diff options
Diffstat (limited to '')
| -rw-r--r-- | browser/components/urlbar/UrlbarView.sys.mjs | 3355 |
1 files changed, 3355 insertions, 0 deletions
diff --git a/browser/components/urlbar/UrlbarView.sys.mjs b/browser/components/urlbar/UrlbarView.sys.mjs new file mode 100644 index 0000000000..fe6b0e6ce0 --- /dev/null +++ b/browser/components/urlbar/UrlbarView.sys.mjs @@ -0,0 +1,3355 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +import { AppConstants } from "resource://gre/modules/AppConstants.sys.mjs"; +import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs"; + +const lazy = {}; + +ChromeUtils.defineESModuleGetters(lazy, { + L10nCache: "resource:///modules/UrlbarUtils.sys.mjs", + UrlbarPrefs: "resource:///modules/UrlbarPrefs.sys.mjs", + UrlbarProviderQuickSuggest: + "resource:///modules/UrlbarProviderQuickSuggest.sys.mjs", + UrlbarProviderTopSites: "resource:///modules/UrlbarProviderTopSites.sys.mjs", + UrlbarProvidersManager: "resource:///modules/UrlbarProvidersManager.sys.mjs", + UrlbarProviderWeather: "resource:///modules/UrlbarProviderWeather.sys.mjs", + UrlbarResult: "resource:///modules/UrlbarResult.sys.mjs", + UrlbarSearchOneOffs: "resource:///modules/UrlbarSearchOneOffs.sys.mjs", + UrlbarTokenizer: "resource:///modules/UrlbarTokenizer.sys.mjs", + UrlbarUtils: "resource:///modules/UrlbarUtils.sys.mjs", +}); + +XPCOMUtils.defineLazyModuleGetters(lazy, { + BrowserWindowTracker: "resource:///modules/BrowserWindowTracker.jsm", + ObjectUtils: "resource://gre/modules/ObjectUtils.jsm", +}); + +XPCOMUtils.defineLazyServiceGetter( + lazy, + "styleSheetService", + "@mozilla.org/content/style-sheet-service;1", + "nsIStyleSheetService" +); + +// Query selector for selectable elements in results. +const SELECTABLE_ELEMENT_SELECTOR = "[role=button], [selectable]"; +const KEYBOARD_SELECTABLE_ELEMENT_SELECTOR = + "[role=button]:not([keyboard-inaccessible]), [selectable]"; + +const ZERO_PREFIX_HISTOGRAM_DWELL_TIME = "FX_URLBAR_ZERO_PREFIX_DWELL_TIME_MS"; +const ZERO_PREFIX_SCALAR_ABANDONMENT = "urlbar.zeroprefix.abandonment"; +const ZERO_PREFIX_SCALAR_ENGAGEMENT = "urlbar.zeroprefix.engagement"; +const ZERO_PREFIX_SCALAR_EXPOSURE = "urlbar.zeroprefix.exposure"; + +const RESULT_MENU_COMMANDS = { + DISMISS: "dismiss", + HELP: "help", +}; + +const getBoundsWithoutFlushing = element => + element.ownerGlobal.windowUtils.getBoundsWithoutFlushing(element); + +// Used to get a unique id to use for row elements, it wraps at 9999, that +// should be plenty for our needs. +let gUniqueIdSerial = 1; +function getUniqueId(prefix) { + return prefix + (gUniqueIdSerial++ % 9999); +} + +/** + * Receives and displays address bar autocomplete results. + */ +export class UrlbarView { + // Stale rows are removed on a timer with this timeout. + static removeStaleRowsTimeout = 400; + + /** + * @param {UrlbarInput} input + * The UrlbarInput instance belonging to this UrlbarView instance. + */ + constructor(input) { + this.input = input; + this.panel = input.panel; + this.controller = input.controller; + this.document = this.panel.ownerDocument; + this.window = this.document.defaultView; + + this.#mainContainer = this.panel.querySelector(".urlbarView-body-inner"); + this.#rows = this.panel.querySelector(".urlbarView-results"); + this.resultMenu = this.panel.querySelector(".urlbarView-result-menu"); + this.#resultMenuCommands = new WeakMap(); + + this.#rows.addEventListener("mousedown", this); + + // For the horizontal fade-out effect, set the overflow attribute on result + // rows when they overflow. + this.#rows.addEventListener("overflow", this); + this.#rows.addEventListener("underflow", this); + + this.resultMenu.addEventListener("command", this); + this.resultMenu.addEventListener("popupshowing", this); + + // `noresults` is used to style the one-offs without their usual top border + // when no results are present. + this.panel.setAttribute("noresults", "true"); + + this.controller.setView(this); + this.controller.addQueryListener(this); + // This is used by autoOpen to avoid flickering results when reopening + // previously abandoned searches. + this.queryContextCache = new QueryContextCache(5); + + // We cache l10n strings to avoid Fluent's async lookup. + this.#l10nCache = new lazy.L10nCache(this.document.l10n); + + for (let viewTemplate of UrlbarView.dynamicViewTemplatesByName.values()) { + if (viewTemplate.stylesheet) { + addDynamicStylesheet(this.window, viewTemplate.stylesheet); + } + } + } + + get oneOffSearchButtons() { + if (!this.#oneOffSearchButtons) { + this.#oneOffSearchButtons = new lazy.UrlbarSearchOneOffs(this); + this.#oneOffSearchButtons.addEventListener( + "SelectedOneOffButtonChanged", + this + ); + } + return this.#oneOffSearchButtons; + } + + /** + * Whether the panel is open. + * + * @returns {boolean} + */ + get isOpen() { + return this.input.hasAttribute("open"); + } + + get allowEmptySelection() { + let { heuristicResult } = this.#queryContext || {}; + return !heuristicResult || !this.#shouldShowHeuristic(heuristicResult); + } + + get selectedRowIndex() { + if (!this.isOpen) { + return -1; + } + + let selectedRow = this.#getSelectedRow(); + + if (!selectedRow) { + return -1; + } + + return selectedRow.result.rowIndex; + } + + set selectedRowIndex(val) { + if (!this.isOpen) { + throw new Error( + "UrlbarView: Cannot select an item if the view isn't open." + ); + } + + if (val < 0) { + this.#selectElement(null); + return; + } + + let items = Array.from(this.#rows.children).filter(r => + this.#isElementVisible(r) + ); + if (val >= items.length) { + throw new Error(`UrlbarView: Index ${val} is out of bounds.`); + } + + // Select the first selectable element inside the row. If it doesn't + // contain a selectable element, clear the selection. + let row = items[val]; + let element = this.#getNextSelectableElement(row); + if (this.#getRowFromElement(element) != row) { + element = null; + } + + this.#selectElement(element); + } + + get selectedElementIndex() { + if (!this.isOpen || !this.#selectedElement) { + return -1; + } + + return this.#selectedElement.elementIndex; + } + + /** + * @returns {UrlbarResult} + * The currently selected result. + */ + get selectedResult() { + if (!this.isOpen) { + return null; + } + + return this.#getSelectedRow()?.result; + } + + /** + * @returns {Element} + * The currently selected element. + */ + get selectedElement() { + if (!this.isOpen) { + return null; + } + + return this.#selectedElement; + } + + /** + * @returns {boolean} + * Whether the SPACE key should activate the selected element (if any) + * instead of adding to the input value. + */ + shouldSpaceActivateSelectedElement() { + // We want SPACE to activate buttons only. + if (this.selectedElement?.getAttribute("role") != "button") { + return false; + } + // Make sure the input field is empty, otherwise the user might want to add + // a space to the current search string. As it stands, selecting a button + // should always clear the input field, so this is just an extra safeguard. + if (this.input.value) { + return false; + } + return true; + } + + /** + * Clears selection, regardless of view status. + */ + clearSelection() { + this.#selectElement(null, { updateInput: false }); + } + + /** + * @returns {number} + * The number of visible results in the view. Note that this may be larger + * than the number of results in the current query context since the view + * may be showing stale results. + */ + get visibleRowCount() { + let sum = 0; + for (let row of this.#rows.children) { + sum += Number(this.#isElementVisible(row)); + } + return sum; + } + + /** + * Returns the result of the row containing the given element, or the result + * of the element if it itself is a row. + * + * @param {Element} element + * An element in the view. + * @returns {UrlbarResult} + * The result of the element's row. + */ + getResultFromElement(element) { + return element?.classList.contains("urlbarView-result-menuitem") + ? this.#resultMenuResult + : this.#getRowFromElement(element)?.result; + } + + /** + * @param {number} index + * The index from which to fetch the result. + * @returns {UrlbarResult} + * The result at `index`. Null if the view is closed or if there are no + * results. + */ + getResultAtIndex(index) { + if ( + !this.isOpen || + !this.#rows.children.length || + index >= this.#rows.children.length + ) { + return null; + } + + return this.#rows.children[index].result; + } + + /** + * @param {UrlbarResult} result A result. + * @returns {boolean} True if the given result is selected. + */ + resultIsSelected(result) { + if (this.selectedRowIndex < 0) { + return false; + } + + return result.rowIndex == this.selectedRowIndex; + } + + /** + * Moves the view selection forward or backward. + * + * @param {number} amount + * The number of steps to move. + * @param {object} options Options object + * @param {boolean} [options.reverse] + * Set to true to select the previous item. By default the next item + * will be selected. + * @param {boolean} [options.userPressedTab] + * Set to true if the user pressed Tab to select a result. Default false. + */ + selectBy(amount, { reverse = false, userPressedTab = false } = {}) { + if (!this.isOpen) { + throw new Error( + "UrlbarView: Cannot select an item if the view isn't open." + ); + } + + // Freeze results as the user is interacting with them, unless we are + // deferring events while waiting for critical results. + if (!this.input.eventBufferer.isDeferringEvents) { + this.controller.cancelQuery(); + } + + if (!userPressedTab) { + let { selectedRowIndex } = this; + let end = this.visibleRowCount - 1; + if (selectedRowIndex == -1) { + this.selectedRowIndex = reverse ? end : 0; + return; + } + let endReached = selectedRowIndex == (reverse ? 0 : end); + if (endReached) { + if (this.allowEmptySelection) { + this.#selectElement(null); + } else { + this.selectedRowIndex = reverse ? end : 0; + } + return; + } + this.selectedRowIndex = Math.max( + 0, + Math.min(end, selectedRowIndex + amount * (reverse ? -1 : 1)) + ); + return; + } + + // Tab key handling below. + + // Do not set aria-activedescendant if the user is moving to a + // tab-to-search result with the Tab key. If + // accessibility.tabToSearch.announceResults is set, the tab-to-search + // result was announced to the user as they typed. We don't set + // aria-activedescendant so the user doesn't think they have to press + // Enter to enter search mode. See bug 1647929. + const isSkippableTabToSearchAnnounce = selectedElt => { + let result = this.getResultFromElement(selectedElt); + let skipAnnouncement = + result?.providerName == "TabToSearch" && + !this.#announceTabToSearchOnSelection && + lazy.UrlbarPrefs.get("accessibility.tabToSearch.announceResults"); + if (skipAnnouncement) { + // Once we skip setting aria-activedescendant once, we should not skip + // it again if the user returns to that result. + this.#announceTabToSearchOnSelection = true; + } + return skipAnnouncement; + }; + + let selectedElement = this.#selectedElement; + + // We cache the first and last rows since they will not change while + // selectBy is running. + let firstSelectableElement = this.#getFirstSelectableElement(); + // #getLastSelectableElement will not return an element that is over + // maxResults and thus may be hidden and not selectable. + let lastSelectableElement = this.#getLastSelectableElement(); + + if (!selectedElement) { + selectedElement = reverse + ? lastSelectableElement + : firstSelectableElement; + this.#selectElement(selectedElement, { + setAccessibleFocus: !isSkippableTabToSearchAnnounce(selectedElement), + }); + return; + } + let endReached = reverse + ? selectedElement == firstSelectableElement + : selectedElement == lastSelectableElement; + if (endReached) { + if (this.allowEmptySelection) { + selectedElement = null; + } else { + selectedElement = reverse + ? lastSelectableElement + : firstSelectableElement; + } + this.#selectElement(selectedElement, { + setAccessibleFocus: !isSkippableTabToSearchAnnounce(selectedElement), + }); + return; + } + + while (amount-- > 0) { + let next = reverse + ? this.#getPreviousSelectableElement(selectedElement) + : this.#getNextSelectableElement(selectedElement); + if (!next) { + break; + } + selectedElement = next; + } + this.#selectElement(selectedElement, { + setAccessibleFocus: !isSkippableTabToSearchAnnounce(selectedElement), + }); + } + + async acknowledgeFeedback(result) { + let row = this.#rows.children[result.rowIndex]; + if (!row) { + return; + } + + let l10n = { id: "firefox-suggest-feedback-acknowledgment" }; + await this.#l10nCache.ensure(l10n); + if (row.result != result) { + return; + } + + let { value } = this.#l10nCache.get(l10n); + row.setAttribute("feedback-acknowledgment", value); + this.window.A11yUtils.announce({ + raw: value, + source: row._content.closest("[role=option]"), + }); + } + + acknowledgeDismissal(result) { + let row = this.#rows.children[result.rowIndex]; + if (!row || row.result != result) { + return; + } + + // The row is no longer selectable. It's necessary to clear the selection + // before replacing the row because replacement will likely create a new + // `urlbarView-row-inner`, which will interfere with the ability of + // `#selectElement()` to clear the old selection after replacement, below. + let isSelected = this.#getSelectedRow() == row; + if (isSelected) { + this.#selectElement(null, { updateInput: false }); + } + this.#setRowSelectable(row, false); + + // Replace the row with a dismissal acknowledgment tip. + let tip = new lazy.UrlbarResult( + lazy.UrlbarUtils.RESULT_TYPE.TIP, + lazy.UrlbarUtils.RESULT_SOURCE.OTHER_LOCAL, + { + type: "dismissalAcknowledgment", + titleL10n: { id: "firefox-suggest-dismissal-acknowledgment" }, + buttons: [{ l10n: { id: "urlbar-search-tips-confirm-short" } }], + icon: "chrome://branding/content/icon32.png", + } + ); + this.#updateRow(row, tip); + this.#updateIndices(); + + // If the row was selected, move the selection to the tip button. + if (isSelected) { + this.#selectElement(this.#getNextSelectableElement(row), { + updateInput: false, + }); + } + } + + removeAccessibleFocus() { + this.#setAccessibleFocus(null); + } + + clear() { + this.#rows.textContent = ""; + this.panel.setAttribute("noresults", "true"); + this.clearSelection(); + this.visibleResults = []; + } + + /** + * Closes the view, cancelling the query if necessary. + * + * @param {object} options Options object + * @param {boolean} [options.elementPicked] + * True if the view is being closed because a result was picked. + * @param {boolean} [options.showFocusBorder] + * True if the Urlbar focus border should be shown after the view is closed. + */ + close({ elementPicked = false, showFocusBorder = true } = {}) { + this.controller.cancelQuery(); + // We do not show the focus border when an element is picked because we'd + // flash it just before the input is blurred. The focus border is removed + // in UrlbarInput._on_blur. + if (!elementPicked && showFocusBorder) { + this.input.removeAttribute("suppress-focus-border"); + } + + if (!this.isOpen) { + return; + } + + this.#inputWidthOnLastClose = getBoundsWithoutFlushing( + this.input.textbox + ).width; + + // We exit search mode preview on close since the result previewing it is + // implicitly unselected. + if (this.input.searchMode?.isPreview) { + this.input.searchMode = null; + } + + this.resultMenu.hidePopup(); + this.removeAccessibleFocus(); + this.input.inputField.setAttribute("aria-expanded", "false"); + this.#openPanelInstance = null; + this.#previousTabToSearchEngine = null; + + this.input.removeAttribute("open"); + this.input.endLayoutExtend(); + + // Search Tips can open the view without the Urlbar being focused. If the + // tip is ignored (e.g. the page content is clicked or the window loses + // focus) we should discard the telemetry event created when the view was + // opened. + if (!this.input.focused && !elementPicked) { + this.controller.engagementEvent.discard(); + this.controller.engagementEvent.record(null, {}); + } + + this.window.removeEventListener("resize", this); + this.window.removeEventListener("blur", this); + + this.controller.notify(this.controller.NOTIFICATIONS.VIEW_CLOSE); + + if (this.#isShowingZeroPrefix) { + if (elementPicked) { + Services.telemetry.scalarAdd(ZERO_PREFIX_SCALAR_ENGAGEMENT, 1); + } else { + Services.telemetry.scalarAdd(ZERO_PREFIX_SCALAR_ABANDONMENT, 1); + } + this.#setIsShowingZeroPrefix(false); + } + } + + /** + * This can be used to open the view automatically as a consequence of + * specific user actions. For Top Sites searches (without a search string) + * the view is opened only for mouse or keyboard interactions. + * If the user abandoned a search (there is a search string) the view is + * reopened, and we try to use cached results to reduce flickering, then a new + * query is started to refresh results. + * + * @param {object} options Options object + * @param {Event} options.event The event associated with the call to autoOpen. + * @param {boolean} [options.suppressFocusBorder] If true, we hide the focus border + * when the panel is opened. This is true by default to avoid flashing + * the border when the unfocused address bar is clicked. + * @returns {boolean} Whether the view was opened. + */ + autoOpen({ event, suppressFocusBorder = true }) { + if (this.#pickSearchTipIfPresent(event)) { + return false; + } + + if (!event) { + return false; + } + + let queryOptions = { event }; + + if ( + !this.input.value || + (this.input.getAttribute("pageproxystate") == "valid" && + !this.window.gBrowser.selectedBrowser.searchTerms) + ) { + if (!this.isOpen && ["mousedown", "command"].includes(event.type)) { + // Try to reuse the cached top-sites context. If it's not cached, then + // there will be a gap of time between when the input is focused and + // when the view opens that can be perceived as flicker. + if (!this.input.searchMode && this.queryContextCache.topSitesContext) { + this.onQueryResults(this.queryContextCache.topSitesContext); + } + this.input.startQuery(queryOptions); + if (suppressFocusBorder) { + this.input.toggleAttribute("suppress-focus-border", true); + } + return true; + } + return false; + } + + // Reopen abandoned searches only if the input is focused. + if (!this.input.focused) { + return false; + } + + // Tab switch is the only case where we requery if the view is open, because + // switching tabs doesn't necessarily close the view. + if (this.isOpen && event.type != "tabswitch") { + return false; + } + + // We can reuse the current rows as they are if the input value and width + // haven't changed since the view was closed. The width check is related to + // row overflow: If we reuse the current rows, overflow and underflow events + // won't fire even if the view's width has changed and there are rows that + // do actually overflow or underflow. That means previously overflowed rows + // may unnecessarily show the overflow gradient, for example. + if ( + this.#rows.firstElementChild && + this.#queryContext.searchString == this.input.value && + this.#inputWidthOnLastClose == + getBoundsWithoutFlushing(this.input.textbox).width + ) { + // We can reuse the current rows. + queryOptions.allowAutofill = this.#queryContext.allowAutofill; + } else { + // To reduce flickering, try to reuse a cached UrlbarQueryContext. The + // overflow problem is addressed in this case because `onQueryResults()` + // starts the regular view-update process, during which the overflow state + // is reset on all rows. + let cachedQueryContext = this.queryContextCache.get(this.input.value); + if (cachedQueryContext) { + this.onQueryResults(cachedQueryContext); + } + } + + this.controller.engagementEvent.discard(); + queryOptions.searchString = this.input.value; + queryOptions.autofillIgnoresSelection = true; + queryOptions.event.interactionType = "returned"; + + // A search tip can be cached in results if it was shown but ignored + // by the user. Don't open the panel if a search tip is present or it + // will cause a flicker since it'll be quickly overwritten (Bug 1812261). + if ( + this.#queryContext?.results?.length && + this.#queryContext.results[0].type != lazy.UrlbarUtils.RESULT_TYPE.TIP + ) { + this.#openPanel(); + } + + // If we had cached results, this will just refresh them, avoiding results + // flicker, otherwise there may be some noise. + this.input.startQuery(queryOptions); + if (suppressFocusBorder) { + this.input.toggleAttribute("suppress-focus-border", true); + } + return true; + } + + // UrlbarController listener methods. + onQueryStarted(queryContext) { + this.#queryWasCancelled = false; + this.#queryUpdatedResults = false; + this.#openPanelInstance = null; + if (!queryContext.searchString) { + this.#previousTabToSearchEngine = null; + } + this.#startRemoveStaleRowsTimer(); + + // Cache l10n strings so they're available when we update the view as + // results arrive. This is a no-op for strings that are already cached. + // `#cacheL10nStrings` is async but we don't await it because doing so would + // require view updates to be async. Instead we just opportunistically cache + // and if there's a cache miss we fall back to `l10n.setAttributes`. + this.#cacheL10nStrings(); + } + + onQueryCancelled(queryContext) { + this.#queryWasCancelled = true; + this.#cancelRemoveStaleRowsTimer(); + } + + onQueryFinished(queryContext) { + this.#cancelRemoveStaleRowsTimer(); + if (this.#queryWasCancelled) { + return; + } + + // At this point the query finished successfully. If it returned some + // results, remove stale rows. Otherwise remove all rows. + if (this.#queryUpdatedResults) { + this.#removeStaleRows(); + } else { + this.clear(); + } + + // Now that the view has finished updating for this query, call + // `#setIsShowingZeroPrefix()`. + this.#setIsShowingZeroPrefix(!queryContext.searchString); + + // If the query returned results, we're done. + if (this.#queryUpdatedResults) { + return; + } + + // If search mode isn't active, close the view. + if (!this.input.searchMode) { + this.close(); + return; + } + + // Search mode is active. If the one-offs should be shown, make sure they + // are enabled and show the view. + let openPanelInstance = (this.#openPanelInstance = {}); + this.oneOffSearchButtons.willHide().then(willHide => { + if (!willHide && openPanelInstance == this.#openPanelInstance) { + this.oneOffSearchButtons.enable(true); + this.#openPanel(); + } + }); + } + + onQueryResults(queryContext) { + this.queryContextCache.put(queryContext); + this.#queryContext = queryContext; + + if (!this.isOpen) { + this.clear(); + } + this.#queryUpdatedResults = true; + this.#updateResults(); + + let firstResult = queryContext.results[0]; + + if (queryContext.lastResultCount == 0) { + // Clear the selection when we get a new set of results. + this.#selectElement(null, { + updateInput: false, + }); + + // Show the one-off search buttons unless any of the following are true: + // * The first result is a search tip + // * The search string is empty + // * The search string starts with an `@` or a search restriction + // character + this.oneOffSearchButtons.enable( + firstResult.providerName != "UrlbarProviderSearchTips" && + queryContext.trimmedSearchString[0] != "@" && + (queryContext.trimmedSearchString[0] != + lazy.UrlbarTokenizer.RESTRICT.SEARCH || + queryContext.trimmedSearchString.length != 1) + ); + } + + if (!this.selectedElement && !this.oneOffSearchButtons.selectedButton) { + if (firstResult.heuristic) { + // Select the heuristic result. The heuristic may not be the first + // result added, which is why we do this check here when each result is + // added and not above. + if (this.#shouldShowHeuristic(firstResult)) { + this.#selectElement(this.#getFirstSelectableElement(), { + updateInput: false, + setAccessibleFocus: + this.controller._userSelectionBehavior == "arrow", + }); + } else { + this.input.setResultForCurrentValue(firstResult); + } + } else if ( + firstResult.payload.providesSearchMode && + queryContext.trimmedSearchString != "@" + ) { + // Filtered keyword offer results can be in the first position but not + // be heuristic results. We do this so the user can press Tab to select + // them, resembling tab-to-search. In that case, the input value is + // still associated with the first result. + this.input.setResultForCurrentValue(firstResult); + } + } + + // Announce tab-to-search results to screen readers as the user types. + // Check to make sure we don't announce the same engine multiple times in + // a row. + let secondResult = queryContext.results[1]; + if ( + secondResult?.providerName == "TabToSearch" && + lazy.UrlbarPrefs.get("accessibility.tabToSearch.announceResults") && + this.#previousTabToSearchEngine != secondResult.payload.engine + ) { + let engine = secondResult.payload.engine; + this.window.A11yUtils.announce({ + id: secondResult.payload.isGeneralPurposeEngine + ? "urlbar-result-action-before-tabtosearch-web" + : "urlbar-result-action-before-tabtosearch-other", + args: { engine }, + }); + this.#previousTabToSearchEngine = engine; + // Do not set aria-activedescendant when the user tabs to the result + // because we already announced it. + this.#announceTabToSearchOnSelection = false; + } + + // If we update the selected element, a new unique ID is generated for it. + // We need to ensure that aria-activedescendant reflects this new ID. + if (this.selectedElement && !this.oneOffSearchButtons.selectedButton) { + let aadID = this.input.inputField.getAttribute("aria-activedescendant"); + if (aadID && !this.document.getElementById(aadID)) { + this.#setAccessibleFocus(this.selectedElement); + } + } + + this.#openPanel(); + + if (firstResult.heuristic) { + // The heuristic result may be a search alias result, so apply formatting + // if necessary. Conversely, the heuristic result of the previous query + // may have been an alias, so remove formatting if necessary. + this.input.formatValue(); + } + + if (queryContext.deferUserSelectionProviders.size) { + // DeferUserSelectionProviders block user selection until the result is + // shown, so it's the view's duty to remove them. + // Doing it sooner, like when the results are added by the provider, + // would not suffice because there's still a delay before those results + // reach the view. + queryContext.results.forEach(r => { + queryContext.deferUserSelectionProviders.delete(r.providerName); + }); + } + } + + /** + * Handles removing a result from the view when it is removed from the query, + * and attempts to select the new result on the same row. + * + * This assumes that the result rows are in index order. + * + * @param {number} index The index of the result that has been removed. + */ + onQueryResultRemoved(index) { + let rowToRemove = this.#rows.children[index]; + rowToRemove.remove(); + + this.#updateIndices(); + + if (rowToRemove != this.#getSelectedRow()) { + return; + } + + // Select the row at the same index, if possible. + let newSelectionIndex = index; + if (index >= this.#queryContext.results.length) { + newSelectionIndex = this.#queryContext.results.length - 1; + } + if (newSelectionIndex >= 0) { + this.selectedRowIndex = newSelectionIndex; + } + } + + openResultMenu(result, anchor) { + this.#resultMenuResult = result; + + if (AppConstants.platform == "macosx") { + // `openPopup(anchor)` doesn't use a native context menu, which is very + // noticeable on Mac. Use `openPopup()` with x and y coords instead. See + // bug 1831760 and bug 1710459. + let rect = getBoundsWithoutFlushing(anchor); + rect = this.window.windowUtils.toScreenRectInCSSUnits( + rect.x, + rect.y, + rect.width, + rect.height + ); + this.resultMenu.openPopup(null, { + x: rect.x, + y: rect.y + rect.height, + }); + } else { + this.resultMenu.openPopup(anchor, "bottomright topright"); + } + + anchor.toggleAttribute("open", true); + let listener = event => { + if (event.target == this.resultMenu) { + anchor.removeAttribute("open"); + this.resultMenu.removeEventListener("popuphidden", listener); + } + }; + this.resultMenu.addEventListener("popuphidden", listener); + } + + /** + * Clears the result menu commands cache, removing the cached commands for all + * results. This is useful when the commands for one or more results change + * while the results remain in the view. + */ + invalidateResultMenuCommands() { + this.#resultMenuCommands = new WeakMap(); + } + + /** + * Passes DOM events for the view to the on_<event type> methods. + * + * @param {Event} event + * DOM event from the <view>. + */ + handleEvent(event) { + let methodName = "on_" + event.type; + if (methodName in this) { + this[methodName](event); + } else { + throw new Error("Unrecognized UrlbarView event: " + event.type); + } + } + + static dynamicViewTemplatesByName = new Map(); + + /** + * Registers the view template for a dynamic result type. A view template is + * a plain object that describes the DOM subtree for a dynamic result type. + * When a dynamic result is shown in the urlbar view, its type's view template + * is used to construct the part of the view that represents the result. + * + * The specified view template will be available to the urlbars in all current + * and future browser windows until it is unregistered. A given dynamic + * result type has at most one view template. If this method is called for a + * dynamic result type more than once, the view template in the last call + * overrides those in previous calls. + * + * @param {string} name + * The view template will be registered for the dynamic result type with + * this name. + * @param {object} viewTemplate + * This object describes the DOM subtree for the given dynamic result type. + * It should be a tree-like nested structure with each object in the nesting + * representing a DOM element to be created. This tree-like structure is + * achieved using the `children` property described below. Each object in + * the structure may include the following properties: + * + * {string} name + * The name of the object. It is required for all objects in the + * structure except the root object and serves two important functions: + * (1) The element created for the object will automatically have a class + * named `urlbarView-dynamic-${dynamicType}-${name}`, where + * `dynamicType` is the name of the dynamic result type. The element + * will also automatically have an attribute "name" whose value is + * this name. The class and attribute allow the element to be styled + * in CSS. + * (2) The name is used when updating the view. See + * UrlbarProvider.getViewUpdate(). + * Names must be unique within a view template, but they don't need to be + * globally unique. i.e., two different view templates can use the same + * names, and other DOM elements can use the same names in their IDs and + * classes. The name also suffixes the dynamic element's ID: an element + * with name `data` will get the ID `urlbarView-row-{unique number}-data`. + * If there is no name provided for the root element, the root element + * will not get an ID. + * {string} tag + * The tag name of the object. It is required for all objects in the + * structure except the root object and declares the kind of element that + * will be created for the object: span, div, img, etc. + * {object} [attributes] + * An optional mapping from attribute names to values. For each + * name-value pair, an attribute is added to the element created for the + * object. The `id` attribute is reserved and cannot be set by the + * provider. Element IDs are passed back to the provider in getViewUpdate + * if they are needed. + * {array} [children] + * An optional list of children. Each item in the array must be an object + * as described here. For each item, a child element as described by the + * item is created and added to the element created for the parent object. + * {array} [classList] + * An optional list of classes. Each class will be added to the element + * created for the object by calling element.classList.add(). + * {boolean} [overflowable] + * If true, the element's overflow status will be tracked in order to + * fade it out when needed. + * {string} [stylesheet] + * An optional stylesheet URL. This property is valid only on the root + * object in the structure. The stylesheet will be loaded in all browser + * windows so that the dynamic result type view may be styled. + */ + static addDynamicViewTemplate(name, viewTemplate) { + this.dynamicViewTemplatesByName.set(name, viewTemplate); + if (viewTemplate.stylesheet) { + for (let window of lazy.BrowserWindowTracker.orderedWindows) { + addDynamicStylesheet(window, viewTemplate.stylesheet); + } + } + } + + /** + * Unregisters the view template for a dynamic result type. + * + * @param {string} name + * The view template will be unregistered for the dynamic result type with + * this name. + */ + static removeDynamicViewTemplate(name) { + let viewTemplate = this.dynamicViewTemplatesByName.get(name); + if (!viewTemplate) { + return; + } + this.dynamicViewTemplatesByName.delete(name); + if (viewTemplate.stylesheet) { + for (let window of lazy.BrowserWindowTracker.orderedWindows) { + removeDynamicStylesheet(window, viewTemplate.stylesheet); + } + } + } + + // Private properties and methods below. + #announceTabToSearchOnSelection; + #inputWidthOnLastClose = 0; + #l10nCache; + #mainContainer; + #mousedownSelectedElement; + #openPanelInstance; + #oneOffSearchButtons; + #previousTabToSearchEngine; + #queryContext; + #queryUpdatedResults; + #queryWasCancelled; + #removeStaleRowsTimer; + #resultMenuResult; + #resultMenuCommands; + #rows; + #selectedElement; + #zeroPrefixStopwatchInstance = null; + + #createElement(name) { + return this.document.createElementNS("http://www.w3.org/1999/xhtml", name); + } + + #openPanel() { + if (this.isOpen) { + return; + } + this.controller.userSelectionBehavior = "none"; + + this.panel.removeAttribute("actionoverride"); + + this.#enableOrDisableRowWrap(); + + this.input.inputField.setAttribute("aria-expanded", "true"); + + this.input.toggleAttribute("suppress-focus-border", true); + this.input.toggleAttribute("open", true); + this.input.startLayoutExtend(); + + this.window.addEventListener("resize", this); + this.window.addEventListener("blur", this); + + this.controller.notify(this.controller.NOTIFICATIONS.VIEW_OPEN); + } + + #shouldShowHeuristic(result) { + if (!result?.heuristic) { + throw new Error("A heuristic result must be given"); + } + return ( + !lazy.UrlbarPrefs.get("experimental.hideHeuristic") || + result.type == lazy.UrlbarUtils.RESULT_TYPE.TIP + ); + } + + /** + * Whether a result is a search suggestion. + * + * @param {UrlbarResult} result The result to examine. + * @returns {boolean} Whether the result is a search suggestion. + */ + #resultIsSearchSuggestion(result) { + return Boolean( + result && + result.type == lazy.UrlbarUtils.RESULT_TYPE.SEARCH && + result.payload.suggestion + ); + } + + /** + * Checks whether the given row index can be update to the result we want + * to apply. This is used in #updateResults to avoid flickering of results, by + * reusing existing rows. + * + * @param {number} rowIndex Index of the row to examine. + * @param {UrlbarResult} result The result we'd like to apply. + * @param {boolean} seenSearchSuggestion Whether the view update has + * encountered an existing row with a search suggestion result. + * @returns {boolean} Whether the row can be updated to this result. + */ + #rowCanUpdateToResult(rowIndex, result, seenSearchSuggestion) { + // The heuristic result must always be current, thus it's always compatible. + if (result.heuristic) { + return true; + } + let row = this.#rows.children[rowIndex]; + if (result.hasSuggestedIndex != row.result.hasSuggestedIndex) { + // Don't replace a suggestedIndex result with a non-suggestedIndex result + // or vice versa. + return false; + } + if ( + result.hasSuggestedIndex && + result.suggestedIndex != row.result.suggestedIndex + ) { + // Don't replace a suggestedIndex result with another suggestedIndex + // result if the suggestedIndex values are different. + return false; + } + let resultIsSearchSuggestion = this.#resultIsSearchSuggestion(result); + // If the row is same type, just update it. + if ( + resultIsSearchSuggestion == this.#resultIsSearchSuggestion(row.result) + ) { + return true; + } + // If the row has a different type, update it if we are in a compatible + // index range. + // In practice we don't want to overwrite a search suggestion with a non + // search suggestion, but we allow the opposite. + return resultIsSearchSuggestion && seenSearchSuggestion; + } + + #updateResults() { + // TODO: For now this just compares search suggestions to the rest, in the + // future we should make it support any type of result. Or, even better, + // results should be grouped, thus we can directly update groups. + + // Walk rows and find an insertion index for results. To avoid flicker, we + // skip rows until we find one compatible with the result we want to apply. + // If we couldn't find a compatible range, we'll just update. + let results = this.#queryContext.results; + if (results[0]?.heuristic && !this.#shouldShowHeuristic(results[0])) { + // Exclude the heuristic. + results = results.slice(1); + } + let rowIndex = 0; + let resultIndex = 0; + let visibleSpanCount = 0; + let seenMisplacedResult = false; + let seenSearchSuggestion = false; + + // We can have more rows than the visible ones. + for ( + ; + rowIndex < this.#rows.children.length && resultIndex < results.length; + ++rowIndex + ) { + let row = this.#rows.children[rowIndex]; + if (this.#isElementVisible(row)) { + visibleSpanCount += lazy.UrlbarUtils.getSpanForResult(row.result); + } + // Continue updating rows as long as we haven't encountered a new + // suggestedIndex result that couldn't replace a current result. + if (!seenMisplacedResult) { + let result = results[resultIndex]; + // skip this result if it is supposed to be hidden from the view. + if (result.exposureResultHidden) { + this.#addExposure(result); + resultIndex++; + continue; + } + seenSearchSuggestion = + seenSearchSuggestion || + (!row.result.heuristic && this.#resultIsSearchSuggestion(row.result)); + if ( + this.#rowCanUpdateToResult(rowIndex, result, seenSearchSuggestion) + ) { + // We can replace the row's current result with the new one. + this.#updateRow(row, result); + resultIndex++; + continue; + } + if (result.hasSuggestedIndex || row.result.hasSuggestedIndex) { + seenMisplacedResult = true; + } + } + row.setAttribute("stale", "true"); + } + + // Mark all the remaining rows as stale and update the visible span count. + // We include stale rows in the count because we should never show more than + // maxResults spans at one time. Later we'll remove stale rows and unhide + // excess non-stale rows. + for (; rowIndex < this.#rows.children.length; ++rowIndex) { + let row = this.#rows.children[rowIndex]; + row.setAttribute("stale", "true"); + if (this.#isElementVisible(row)) { + visibleSpanCount += lazy.UrlbarUtils.getSpanForResult(row.result); + } + } + + // Add remaining results, if we have fewer rows than results. + for (; resultIndex < results.length; ++resultIndex) { + let result = results[resultIndex]; + // skip this result if it is supposed to be hidden from the view. + if (result.exposureResultHidden) { + this.#addExposure(result); + continue; + } + let row = this.#createRow(); + this.#updateRow(row, result); + if (!seenMisplacedResult && result.hasSuggestedIndex) { + if (result.isSuggestedIndexRelativeToGroup) { + // We can't know at this point what the right index of a group- + // relative suggestedIndex result will be. To avoid all all possible + // flicker, don't make it (and all rows after it) visible until stale + // rows are removed. + seenMisplacedResult = true; + } else { + // We need to check whether the new suggestedIndex result will end up + // at its right index if we append it here. The "right" index is the + // final index the result will occupy once the update is done and all + // stale rows have been removed. We could use a more flexible + // definition, but we use this strict one in order to avoid all + // perceived flicker and movement of suggestedIndex results. Once + // stale rows are removed, the final number of rows in the view will + // be the new result count, so we base our arithmetic here on it. + let finalIndex = + result.suggestedIndex >= 0 + ? Math.min(results.length - 1, result.suggestedIndex) + : Math.max(0, results.length + result.suggestedIndex); + if (this.#rows.children.length != finalIndex) { + seenMisplacedResult = true; + } + } + } + let newVisibleSpanCount = + visibleSpanCount + lazy.UrlbarUtils.getSpanForResult(result); + if ( + newVisibleSpanCount <= this.#queryContext.maxResults && + !seenMisplacedResult + ) { + // The new row can be visible. + visibleSpanCount = newVisibleSpanCount; + } else { + // The new row must be hidden at first because the view is already + // showing maxResults spans, or we encountered a new suggestedIndex + // result that couldn't be placed in the right spot. We'll show it when + // stale rows are removed. + this.#setRowVisibility(row, false); + } + this.#rows.appendChild(row); + } + + this.#updateIndices(); + } + + #createRow() { + let item = this.#createElement("div"); + item.className = "urlbarView-row"; + item._elements = new Map(); + item._buttons = new Map(); + + // A note about row selection. Any element in a row that can be selected + // will have the `selectable` attribute set on it. For typical rows, the + // selectable element is not the `.urlbarView-row` itself but rather the + // `.urlbarView-row-inner` inside it. That's because the `.urlbarView-row` + // also contains the row's buttons, which should not be selected when the + // main part of the row -- `.urlbarView-row-inner` -- is selected. + // + // Since it's the row itself and not the row-inner that is a child of the + // `role=listbox` element (the rows container, `this.#rows`), screen readers + // will not automatically recognize the row-inner as a listbox option. To + // compensate, we set `role=option` on the row-inner and `role=presentation` + // on the row itself so that screen readers ignore it. + item.setAttribute("role", "presentation"); + + return item; + } + + #createRowContent(item, result) { + // The url is the only element that can wrap, thus all the other elements + // are child of noWrap. + let noWrap = this.#createElement("span"); + noWrap.className = "urlbarView-no-wrap"; + item._content.appendChild(noWrap); + + let favicon = this.#createElement("img"); + favicon.className = "urlbarView-favicon"; + noWrap.appendChild(favicon); + item._elements.set("favicon", favicon); + + let typeIcon = this.#createElement("span"); + typeIcon.className = "urlbarView-type-icon"; + noWrap.appendChild(typeIcon); + + let tailPrefix = this.#createElement("span"); + tailPrefix.className = "urlbarView-tail-prefix"; + noWrap.appendChild(tailPrefix); + item._elements.set("tailPrefix", tailPrefix); + // tailPrefix holds text only for alignment purposes so it should never be + // read to screen readers. + tailPrefix.toggleAttribute("aria-hidden", true); + + let tailPrefixStr = this.#createElement("span"); + tailPrefixStr.className = "urlbarView-tail-prefix-string"; + tailPrefix.appendChild(tailPrefixStr); + item._elements.set("tailPrefixStr", tailPrefixStr); + + let tailPrefixChar = this.#createElement("span"); + tailPrefixChar.className = "urlbarView-tail-prefix-char"; + tailPrefix.appendChild(tailPrefixChar); + item._elements.set("tailPrefixChar", tailPrefixChar); + + let title = this.#createElement("span"); + title.classList.add("urlbarView-title", "urlbarView-overflowable"); + noWrap.appendChild(title); + item._elements.set("title", title); + + let tagsContainer = this.#createElement("span"); + tagsContainer.classList.add("urlbarView-tags", "urlbarView-overflowable"); + noWrap.appendChild(tagsContainer); + item._elements.set("tagsContainer", tagsContainer); + + let titleSeparator = this.#createElement("span"); + titleSeparator.className = "urlbarView-title-separator"; + noWrap.appendChild(titleSeparator); + item._elements.set("titleSeparator", titleSeparator); + + let action = this.#createElement("span"); + action.className = "urlbarView-action"; + noWrap.appendChild(action); + item._elements.set("action", action); + + let url = this.#createElement("span"); + url.className = "urlbarView-url"; + item._content.appendChild(url); + item._elements.set("url", url); + } + + /** + * @param {Element} node + * The element to set attributes on. + * @param {object} attributes + * Attribute names to values mapping. For each name-value pair, an + * attribute is set on the element, except for `null` as a value which + * signals an attribute should be removed, and `undefined` in which case + * the attribute won't be set nor removed. The `id` attribute is reserved + * and cannot be set here. + */ + #setDynamicAttributes(node, attributes) { + if (!attributes) { + return; + } + for (let [name, value] of Object.entries(attributes)) { + if (name == "id") { + // IDs are managed externally to ensure they are unique. + console.error( + `Not setting id="${value}", as dynamic attributes may not include IDs.` + ); + continue; + } + if (value === undefined) { + continue; + } + if (value === null) { + node.removeAttribute(name); + } else if (typeof value == "boolean") { + node.toggleAttribute(name, value); + } else { + node.setAttribute(name, value); + } + } + } + + #createRowContentForDynamicType(item, result) { + let { dynamicType } = result.payload; + let provider = lazy.UrlbarProvidersManager.getProvider(result.providerName); + let viewTemplate = + provider.getViewTemplate?.(result) || + UrlbarView.dynamicViewTemplatesByName.get(dynamicType); + if (!viewTemplate) { + console.error(`No viewTemplate found for ${result.providerName}`); + } + this.#buildViewForDynamicType( + dynamicType, + item._content, + item._elements, + viewTemplate + ); + this.#setRowSelectable(item, item._content.hasAttribute("selectable")); + } + + #buildViewForDynamicType(type, parentNode, elementsByName, template) { + // Set attributes on parentNode. + this.#setDynamicAttributes(parentNode, template.attributes); + // Add classes to parentNode's classList. + if (template.classList) { + parentNode.classList.add(...template.classList); + } + if (template.overflowable) { + parentNode.classList.add("urlbarView-overflowable"); + } + if (template.name) { + parentNode.setAttribute("name", template.name); + elementsByName.set(template.name, parentNode); + } + // Recurse into children. + for (let childTemplate of template.children || []) { + let child = this.#createElement(childTemplate.tag); + child.classList.add(`urlbarView-dynamic-${type}-${childTemplate.name}`); + parentNode.appendChild(child); + this.#buildViewForDynamicType(type, child, elementsByName, childTemplate); + } + } + + #createRowContentForBestMatch(item, result) { + item._content.toggleAttribute("selectable", true); + + let favicon = this.#createElement("img"); + favicon.className = "urlbarView-favicon"; + item._content.appendChild(favicon); + item._elements.set("favicon", favicon); + + let typeIcon = this.#createElement("span"); + typeIcon.className = "urlbarView-type-icon"; + item._content.appendChild(typeIcon); + + let body = this.#createElement("span"); + body.className = "urlbarView-row-body"; + item._content.appendChild(body); + + let top = this.#createElement("div"); + top.className = "urlbarView-row-body-top"; + body.appendChild(top); + + let noWrap = this.#createElement("div"); + noWrap.className = "urlbarView-row-body-top-no-wrap"; + top.appendChild(noWrap); + item._elements.set("noWrap", noWrap); + + let title = this.#createElement("span"); + title.classList.add("urlbarView-title", "urlbarView-overflowable"); + noWrap.appendChild(title); + item._elements.set("title", title); + + let titleSeparator = this.#createElement("span"); + titleSeparator.className = "urlbarView-title-separator"; + noWrap.appendChild(titleSeparator); + item._elements.set("titleSeparator", titleSeparator); + + let url = this.#createElement("span"); + url.className = "urlbarView-url"; + top.appendChild(url); + item._elements.set("url", url); + + let bottom = this.#createElement("div"); + bottom.className = "urlbarView-row-body-bottom"; + body.appendChild(bottom); + item._elements.set("bottom", bottom); + } + + #createRowContentForRichSuggestion(item, result) { + item._content.toggleAttribute("selectable", true); + + let favicon = this.#createElement("img"); + favicon.className = "urlbarView-favicon"; + item._content.appendChild(favicon); + item._elements.set("favicon", favicon); + + let body = this.#createElement("span"); + body.classList.add("urlbarView-no-wrap", "urlbarView-overflowable"); + item._content.appendChild(body); + + let title = this.#createElement("span"); + title.classList.add("urlbarView-title"); + body.appendChild(title); + item._elements.set("title", title); + + let description = this.#createElement("small"); + description.className = "urlbarView-description"; + body.appendChild(description); + item._elements.set("description", description); + + let titleSeparator = this.#createElement("span"); + titleSeparator.className = "urlbarView-title-separator"; + body.appendChild(titleSeparator); + item._elements.set("titleSeparator", titleSeparator); + + let action = this.#createElement("span"); + action.className = "urlbarView-action"; + body.appendChild(action); + item._elements.set("action", action); + + let url = this.#createElement("span"); + url.className = "urlbarView-url"; + item._content.appendChild(url); + item._elements.set("url", url); + } + + #addRowButtons(item, result) { + for (let i = 0; i < result.payload.buttons?.length; i++) { + this.#addRowButton(item, { + name: i.toString(), + ...result.payload.buttons[i], + }); + } + + // TODO: `buttonText` is intended only for WebExtensions. We should remove + // it and the WebExtensions urlbar API since we're no longer using it. + if (result.payload.buttonText) { + this.#addRowButton(item, { + name: "tip", + url: result.payload.buttonUrl, + }); + item._buttons.get("tip").textContent = result.payload.buttonText; + } + + if (!lazy.UrlbarPrefs.get("resultMenu")) { + if (result.payload.isBlockable) { + this.#addRowButton(item, { + name: "block", + command: "dismiss", + l10n: result.payload.blockL10n, + }); + } + if (result.payload.helpUrl) { + this.#addRowButton(item, { + name: "help", + command: "help", + url: result.payload.helpUrl, + l10n: result.payload.helpL10n, + }); + } + } else if (this.#getResultMenuCommands(result)) { + this.#addRowButton(item, { + name: "menu", + l10n: { + id: result.showFeedbackMenu + ? "urlbar-result-menu-button-feedback" + : "urlbar-result-menu-button", + }, + attributes: lazy.UrlbarPrefs.get("resultMenu.keyboardAccessible") + ? null + : { + "keyboard-inaccessible": true, + }, + }); + } + } + + #addRowButton(item, { name, command, l10n, url, attributes }) { + let button = this.#createElement("span"); + this.#setDynamicAttributes(button, attributes); + button.id = `${item.id}-button-${name}`; + button.classList.add("urlbarView-button", "urlbarView-button-" + name); + button.setAttribute("role", "button"); + button.dataset.name = name; + if (l10n) { + this.#setElementL10n(button, l10n); + } + if (command) { + button.dataset.command = command; + } + if (url) { + button.dataset.url = url; + } + item._buttons.set(name, button); + item.appendChild(button); + } + + // eslint-disable-next-line complexity + #updateRow(item, result) { + let oldResult = item.result; + let oldResultType = item.result && item.result.type; + let provider = lazy.UrlbarProvidersManager.getProvider(result.providerName); + item.result = result; + item.removeAttribute("stale"); + item.id = getUniqueId("urlbarView-row-"); + + let needsNewContent = + oldResultType === undefined || + (oldResultType == lazy.UrlbarUtils.RESULT_TYPE.DYNAMIC) != + (result.type == lazy.UrlbarUtils.RESULT_TYPE.DYNAMIC) || + (oldResultType == lazy.UrlbarUtils.RESULT_TYPE.DYNAMIC && + result.type == lazy.UrlbarUtils.RESULT_TYPE.DYNAMIC && + oldResult.payload.dynamicType != result.payload.dynamicType) || + // Dynamic results that implement getViewTemplate will + // always need updating. + provider?.getViewTemplate || + oldResult.isBestMatch != result.isBestMatch || + oldResult.payload.isRichSuggestion != result.payload.isRichSuggestion || + (!lazy.UrlbarPrefs.get("resultMenu") && + (!!result.payload.helpUrl != item._buttons.has("help") || + !!result.payload.isBlockable != item._buttons.has("block"))) || + !!this.#getResultMenuCommands(result) != item._buttons.has("menu") || + !lazy.ObjectUtils.deepEqual( + oldResult.payload.buttons, + result.payload.buttons + ); + + if (needsNewContent) { + while (item.lastChild) { + item.lastChild.remove(); + } + item._elements.clear(); + item._buttons.clear(); + item._content = this.#createElement("span"); + item._content.className = "urlbarView-row-inner"; + item.appendChild(item._content); + item.removeAttribute("tip-type"); + item.removeAttribute("dynamicType"); + item.removeAttribute("feedback-acknowledgment"); + if (item.result.type == lazy.UrlbarUtils.RESULT_TYPE.DYNAMIC) { + this.#createRowContentForDynamicType(item, result); + } else if (item.result.isBestMatch) { + this.#createRowContentForBestMatch(item, result); + } else if (result.payload.isRichSuggestion) { + this.#createRowContentForRichSuggestion(item, result); + } else { + this.#createRowContent(item, result); + } + this.#addRowButtons(item, result); + } + item._content.id = item.id + "-inner"; + + if ( + result.type == lazy.UrlbarUtils.RESULT_TYPE.SEARCH && + !result.payload.providesSearchMode && + !result.payload.inPrivateWindow + ) { + item.setAttribute("type", "search"); + } else if (result.type == lazy.UrlbarUtils.RESULT_TYPE.REMOTE_TAB) { + item.setAttribute("type", "remotetab"); + } else if (result.type == lazy.UrlbarUtils.RESULT_TYPE.TAB_SWITCH) { + item.setAttribute("type", "switchtab"); + } else if (result.type == lazy.UrlbarUtils.RESULT_TYPE.TIP) { + item.setAttribute("type", "tip"); + item.setAttribute("tip-type", result.payload.type); + + // Due to role=button, the button and help icon can sometimes become + // focused. We want to prevent that because the input should always be + // focused instead. (This happens when input.search("", { focus: false }) + // is called, a tip is the first result but not heuristic, and the user + // tabs the into the button from the navbar buttons. The input is skipped + // and the focus goes straight to the tip button.) + item.addEventListener("focus", () => this.input.focus(), true); + + if ( + result.providerName == "UrlbarProviderSearchTips" || + result.payload.type == "dismissalAcknowledgment" + ) { + // For a11y, we treat search tips as alerts. We use A11yUtils.announce + // instead of role="alert" because role="alert" will only fire an alert + // event when the alert (or something inside it) is the root of an + // insertion. In this case, the entire tip result gets inserted into the + // a11y tree as a single insertion, so no alert event would be fired. + this.window.A11yUtils.announce(result.payload.titleL10n); + } + } else if (result.source == lazy.UrlbarUtils.RESULT_SOURCE.BOOKMARKS) { + item.setAttribute("type", "bookmark"); + } else if (result.type == lazy.UrlbarUtils.RESULT_TYPE.DYNAMIC) { + item.setAttribute("type", "dynamic"); + this.#updateRowForDynamicType(item, result); + return; + } else if (result.providerName == "TabToSearch") { + item.setAttribute("type", "tabtosearch"); + } else if (result.isBestMatch) { + item.setAttribute("type", "bestmatch"); + this.#updateRowForBestMatch(item, result); + return; + } else { + item.removeAttribute("type"); + } + + let favicon = item._elements.get("favicon"); + if ( + result.type == lazy.UrlbarUtils.RESULT_TYPE.SEARCH || + result.type == lazy.UrlbarUtils.RESULT_TYPE.KEYWORD + ) { + favicon.src = this.#iconForResult(result); + } else { + favicon.src = result.payload.icon || lazy.UrlbarUtils.ICON.DEFAULT; + } + + let title = item._elements.get("title"); + this.#setResultTitle(result, title); + + if (result.payload.tail && result.payload.tailOffsetIndex > 0) { + this.#fillTailSuggestionPrefix(item, result); + title.setAttribute("aria-label", result.payload.suggestion); + item.toggleAttribute("tail-suggestion", true); + } else { + item.removeAttribute("tail-suggestion"); + title.removeAttribute("aria-label"); + } + + this.#updateOverflowTooltip(title, result.title); + + let tagsContainer = item._elements.get("tagsContainer"); + if (tagsContainer) { + tagsContainer.textContent = ""; + if (result.payload.tags && result.payload.tags.length) { + tagsContainer.append( + ...result.payload.tags.map((tag, i) => { + const element = this.#createElement("span"); + element.className = "urlbarView-tag"; + this.#addTextContentWithHighlights( + element, + tag, + result.payloadHighlights.tags[i] + ); + return element; + }) + ); + } + } + + let action = item._elements.get("action"); + let actionSetter = null; + let isVisitAction = false; + let setURL = false; + let isRowSelectable = true; + switch (result.type) { + case lazy.UrlbarUtils.RESULT_TYPE.TAB_SWITCH: + actionSetter = () => { + this.#setElementL10n(action, { + id: "urlbar-result-action-switch-tab", + }); + }; + setURL = true; + break; + case lazy.UrlbarUtils.RESULT_TYPE.REMOTE_TAB: + actionSetter = () => { + this.#removeElementL10n(action); + action.textContent = result.payload.device; + }; + setURL = true; + break; + case lazy.UrlbarUtils.RESULT_TYPE.SEARCH: + if (result.payload.inPrivateWindow) { + if (result.payload.isPrivateEngine) { + actionSetter = () => { + this.#setElementL10n(action, { + id: "urlbar-result-action-search-in-private-w-engine", + args: { engine: result.payload.engine }, + }); + }; + } else { + actionSetter = () => { + this.#setElementL10n(action, { + id: "urlbar-result-action-search-in-private", + }); + }; + } + } else if (result.providerName == "TabToSearch") { + actionSetter = () => { + this.#setElementL10n(action, { + id: result.payload.isGeneralPurposeEngine + ? "urlbar-result-action-tabtosearch-web" + : "urlbar-result-action-tabtosearch-other-engine", + args: { engine: result.payload.engine }, + }); + }; + } else if (!result.payload.providesSearchMode) { + actionSetter = () => { + this.#setElementL10n(action, { + id: "urlbar-result-action-search-w-engine", + args: { engine: result.payload.engine }, + }); + }; + } + break; + case lazy.UrlbarUtils.RESULT_TYPE.KEYWORD: + isVisitAction = result.payload.input.trim() == result.payload.keyword; + break; + case lazy.UrlbarUtils.RESULT_TYPE.OMNIBOX: + actionSetter = () => { + this.#removeElementL10n(action); + action.textContent = result.payload.content; + }; + break; + case lazy.UrlbarUtils.RESULT_TYPE.TIP: + isRowSelectable = false; + break; + default: + if (result.heuristic && !result.payload.title) { + isVisitAction = true; + } else if ( + result.providerName != lazy.UrlbarProviderQuickSuggest.name + ) { + setURL = true; + } + break; + } + + this.#setRowSelectable(item, isRowSelectable); + + if (result.providerName == "TabToSearch") { + action.toggleAttribute("slide-in", true); + } else { + action.removeAttribute("slide-in"); + } + + if (result.payload.isPinned) { + item.toggleAttribute("pinned", true); + } else { + item.removeAttribute("pinned"); + } + + if ( + result.payload.isSponsored && + result.type != lazy.UrlbarUtils.RESULT_TYPE.TAB_SWITCH + ) { + item.toggleAttribute("sponsored", true); + actionSetter = () => { + this.#setElementL10n(action, { + id: "urlbar-result-action-sponsored", + }); + }; + } else { + item.removeAttribute("sponsored"); + } + + if ( + result.providerName == lazy.UrlbarProviderQuickSuggest.name && + result.payload.isSponsored + ) { + item.toggleAttribute("firefox-suggest-sponsored", true); + } else { + item.removeAttribute("firefox-suggest-sponsored"); + } + + if (result.payload.isRichSuggestion) { + let description = item._elements.get("description"); + description.textContent = result.payload.description; + item.setAttribute("rich-suggestion", "with-icon"); + } else if (lazy.UrlbarPrefs.get("richSuggestions.featureGate")) { + // We need to modify the layout of standard urlbar results when + // richSuggestions are enabled so the titles align. + item.setAttribute("rich-suggestion", "no-icon"); + } else { + item.removeAttribute("rich-suggestion"); + } + + let url = item._elements.get("url"); + if (setURL) { + item.setAttribute("has-url", "true"); + this.#addTextContentWithHighlights( + url, + result.payload.displayUrl, + result.payloadHighlights.displayUrl || [] + ); + this.#updateOverflowTooltip(url, result.payload.displayUrl); + } else { + item.removeAttribute("has-url"); + url.textContent = ""; + this.#updateOverflowTooltip(url, ""); + } + + if (isVisitAction) { + actionSetter = () => { + this.#setElementL10n(action, { + id: "urlbar-result-action-visit", + }); + }; + title.setAttribute("isurl", "true"); + } else { + title.removeAttribute("isurl"); + } + + if (actionSetter) { + actionSetter(); + item._originalActionSetter = actionSetter; + item.setAttribute("has-action", "true"); + } else { + item._originalActionSetter = () => { + this.#removeElementL10n(action); + action.textContent = ""; + }; + item._originalActionSetter(); + item.removeAttribute("has-action"); + } + + if (!title.hasAttribute("isurl")) { + title.setAttribute("dir", "auto"); + } else { + title.removeAttribute("dir"); + } + } + + #setRowSelectable(item, isRowSelectable) { + item.toggleAttribute("row-selectable", isRowSelectable); + item._content.toggleAttribute("selectable", isRowSelectable); + if (isRowSelectable) { + item._content.setAttribute("role", "option"); + } else { + item._content.removeAttribute("role"); + } + } + + #iconForResult(result, iconUrlOverride = null) { + return ( + (result.source == lazy.UrlbarUtils.RESULT_SOURCE.HISTORY && + (result.type == lazy.UrlbarUtils.RESULT_TYPE.SEARCH || + result.type == lazy.UrlbarUtils.RESULT_TYPE.KEYWORD) && + lazy.UrlbarUtils.ICON.HISTORY) || + iconUrlOverride || + result.payload.icon || + (result.type == lazy.UrlbarUtils.RESULT_TYPE.SEARCH && + result.payload.trending && + lazy.UrlbarUtils.ICON.TRENDING) || + ((result.type == lazy.UrlbarUtils.RESULT_TYPE.SEARCH || + result.type == lazy.UrlbarUtils.RESULT_TYPE.KEYWORD) && + lazy.UrlbarUtils.ICON.SEARCH_GLASS) || + lazy.UrlbarUtils.ICON.DEFAULT + ); + } + + async #updateRowForDynamicType(item, result) { + item.setAttribute("dynamicType", result.payload.dynamicType); + + let idsByName = new Map(); + for (let [name, node] of item._elements) { + node.id = `${item.id}-${name}`; + idsByName.set(name, node.id); + } + + // First, apply highlighting. We do this before updating via getViewUpdate + // so the dynamic provider can override the highlighting by setting the + // textContent of the highlighted node, if it wishes. + for (let [payloadName, highlights] of Object.entries( + result.payloadHighlights + )) { + if (!highlights.length) { + continue; + } + // Highlighting only works if the dynamic element name is the same as the + // highlighted payload property name. + let nodeToHighlight = item.querySelector(`#${item.id}-${payloadName}`); + this.#addTextContentWithHighlights( + nodeToHighlight, + result.payload[payloadName], + highlights + ); + } + + // Get the view update from the result's provider. + let provider = lazy.UrlbarProvidersManager.getProvider(result.providerName); + let viewUpdate = await provider.getViewUpdate(result, idsByName); + if (item.result != result) { + return; + } + + // Update each node in the view by name. + for (let [nodeName, update] of Object.entries(viewUpdate)) { + let node = item.querySelector(`#${item.id}-${nodeName}`); + this.#setDynamicAttributes(node, update.attributes); + if (update.style) { + for (let [styleName, value] of Object.entries(update.style)) { + node.style[styleName] = value; + } + } + if (update.l10n) { + if (update.l10n.cacheable) { + await this.#l10nCache.ensureAll([update.l10n]); + if (item.result != result) { + return; + } + } + this.#setElementL10n(node, update.l10n); + } else if (update.textContent) { + node.textContent = update.textContent; + } + } + } + + #updateRowForBestMatch(item, result) { + this.#setRowSelectable(item, true); + + let favicon = item._elements.get("favicon"); + favicon.src = this.#iconForResult(result); + + let title = item._elements.get("title"); + this.#setResultTitle(result, title); + this.#updateOverflowTooltip(title, result.title); + + let url = item._elements.get("url"); + this.#addTextContentWithHighlights( + url, + result.payload.displayUrl, + result.payloadHighlights.displayUrl || [] + ); + this.#updateOverflowTooltip(url, result.payload.displayUrl); + + let bottom = item._elements.get("bottom"); + if (result.payload.isSponsored) { + this.#setElementL10n(bottom, { id: "urlbar-result-action-sponsored" }); + } else { + this.#removeElementL10n(bottom); + } + } + + /** + * Performs a final pass over all rows in the view after a view update, stale + * rows are removed, and other changes to the number of rows. Sets `rowIndex` + * on each result, updates row labels, and performs other tasks that must be + * deferred until all rows have been updated. + */ + #updateIndices() { + this.visibleResults = []; + + // `currentLabel` is the last-seen row label as we iterate through the rows. + // When we encounter a label that's different from `currentLabel`, we add it + // to the row and set it to `currentLabel`; we remove the labels for all + // other rows, and therefore no label will appear adjacent to itself. (A + // label may appear more than once, but there will be at least one different + // label in between.) Each row's label is determined by `#rowLabel()`. + let currentLabel; + + for (let i = 0; i < this.#rows.children.length; i++) { + let item = this.#rows.children[i]; + item.result.rowIndex = i; + + let visible = this.#isElementVisible(item); + if (visible) { + if (item.result.exposureResultType) { + this.#addExposure(item.result); + } + this.visibleResults.push(item.result); + } + + let newLabel = this.#updateRowLabel(item, visible, currentLabel); + if (newLabel) { + currentLabel = newLabel; + } + } + + let selectableElement = this.#getFirstSelectableElement(); + let uiIndex = 0; + while (selectableElement) { + selectableElement.elementIndex = uiIndex++; + selectableElement = this.#getNextSelectableElement(selectableElement); + } + + if (this.visibleResults.length) { + this.panel.removeAttribute("noresults"); + } else { + this.panel.setAttribute("noresults", "true"); + } + } + + /** + * Sets or removes the group label from a row. Designed to be called + * iteratively over each row. + * + * @param {Element} item + * A row in the view. + * @param {boolean} isVisible + * Whether the row is visible. This can be computed by the method itself, + * but it's a parameter as an optimization since the caller is expected to + * know it. + * @param {object} currentLabel + * The current group label during row iteration. + * @returns {object} + * If the given row should not have a label, returns null. Otherwise returns + * an l10n object for the label's l10n string: `{ id, args }` + */ + #updateRowLabel(item, isVisible, currentLabel) { + let label; + if (isVisible) { + label = this.#rowLabel(item, currentLabel); + if (label && lazy.ObjectUtils.deepEqual(label, currentLabel)) { + label = null; + } + } + + // When the row-inner is selected, screen readers won't naturally read the + // label because it's a pseudo-element of the row, not the row-inner. To + // compensate, for rows that have labels we add an element to the row-inner + // with `aria-label` and no text content. Rows that don't have labels won't + // have this element. + let groupAriaLabel = item._elements.get("groupAriaLabel"); + + if (!label) { + this.#removeElementL10n(item, { attribute: "label" }); + if (groupAriaLabel) { + groupAriaLabel.remove(); + item._elements.delete("groupAriaLabel"); + } + return null; + } + + this.#setElementL10n(item, { + attribute: "label", + id: label.id, + args: label.args, + }); + + if (!groupAriaLabel) { + groupAriaLabel = this.#createElement("span"); + groupAriaLabel.className = "urlbarView-group-aria-label"; + item._content.insertBefore(groupAriaLabel, item._content.firstChild); + item._elements.set("groupAriaLabel", groupAriaLabel); + } + + // `aria-label` must be a string, not an l10n ID, so first fetch the + // localized value and then set it as the attribute. There's no relevant + // aria attribute that uses l10n IDs. + this.#l10nCache.ensure(label).then(() => { + let message = this.#l10nCache.get(label); + groupAriaLabel.setAttribute("aria-label", message?.attributes.label); + }); + + return label; + } + + /** + * Returns the group label to use for a row. Designed to be called iteratively + * over each row. + * + * @param {Element} row + * A row in the view. + * @param {object} currentLabel + * The current group label during row iteration. + * @returns {object} + * If the current row should not have a label, returns null. Otherwise + * returns an l10n object for the label's l10n string: `{ id, args }` + */ + #rowLabel(row, currentLabel) { + if (!lazy.UrlbarPrefs.get("groupLabels.enabled")) { + return null; + } + + if ( + row.result.isBestMatch && + row.result.providerName == lazy.UrlbarProviderQuickSuggest.name && + row.result.payload.telemetryType == "amo" + ) { + return { id: "urlbar-group-addon" }; + } + + if ( + row.result.isBestMatch || + row.result.providerName == lazy.UrlbarProviderWeather.name + ) { + return { id: "urlbar-group-best-match" }; + } + + if (!this.#queryContext?.searchString || row.result.heuristic) { + return null; + } + + if (row.result.providerName == lazy.UrlbarProviderQuickSuggest.name) { + return { id: "urlbar-group-firefox-suggest" }; + } + + switch (row.result.type) { + case lazy.UrlbarUtils.RESULT_TYPE.KEYWORD: + case lazy.UrlbarUtils.RESULT_TYPE.REMOTE_TAB: + case lazy.UrlbarUtils.RESULT_TYPE.TAB_SWITCH: + case lazy.UrlbarUtils.RESULT_TYPE.URL: + return { id: "urlbar-group-firefox-suggest" }; + case lazy.UrlbarUtils.RESULT_TYPE.SEARCH: + // Show "{ $engine } suggestions" if it's not the first label. + if (currentLabel && row.result.payload.suggestion) { + let engineName = + row.result.payload.engine || Services.search.defaultEngine.name; + return { + id: "urlbar-group-search-suggestions", + args: { engine: engineName }, + }; + } + break; + case lazy.UrlbarUtils.RESULT_TYPE.DYNAMIC: + if (row.result.providerName == "quickactions") { + return { id: "urlbar-group-quickactions" }; + } + break; + } + + return null; + } + + #setRowVisibility(row, visible) { + row.style.display = visible ? "" : "none"; + if ( + !visible && + row.result.type != lazy.UrlbarUtils.RESULT_TYPE.TIP && + row.result.type != lazy.UrlbarUtils.RESULT_TYPE.DYNAMIC + ) { + // Reset the overflow state of elements that can overflow in case their + // content changes while they're hidden. When making the row visible + // again, we'll get new overflow events if needed. + this.#setElementOverflowing(row._elements.get("title"), false); + this.#setElementOverflowing(row._elements.get("url"), false); + let tagsContainer = row._elements.get("tagsContainer"); + if (tagsContainer) { + this.#setElementOverflowing(tagsContainer, false); + } + } + } + + /** + * Returns true if the given element and its row are both visible. + * + * @param {Element} element + * An element in the view. + * @returns {boolean} + * True if the given element and its row are both visible. + */ + #isElementVisible(element) { + if (!element || element.style.display == "none") { + return false; + } + let row = this.#getRowFromElement(element); + return row && row.style.display != "none"; + } + + #removeStaleRows() { + let row = this.#rows.lastElementChild; + while (row) { + let next = row.previousElementSibling; + if (row.hasAttribute("stale")) { + row.remove(); + } else { + this.#setRowVisibility(row, true); + } + row = next; + } + this.#updateIndices(); + } + + #startRemoveStaleRowsTimer() { + this.#removeStaleRowsTimer = this.window.setTimeout(() => { + this.#removeStaleRowsTimer = null; + this.#removeStaleRows(); + }, UrlbarView.removeStaleRowsTimeout); + } + + #cancelRemoveStaleRowsTimer() { + if (this.#removeStaleRowsTimer) { + this.window.clearTimeout(this.#removeStaleRowsTimer); + this.#removeStaleRowsTimer = null; + } + } + + #selectElement( + element, + { updateInput = true, setAccessibleFocus = true } = {} + ) { + if (element && !element.matches(KEYBOARD_SELECTABLE_ELEMENT_SELECTOR)) { + throw new Error("Element is not keyboard-selectable"); + } + + if (this.#selectedElement) { + this.#selectedElement.toggleAttribute("selected", false); + this.#selectedElement.removeAttribute("aria-selected"); + this.#getSelectedRow()?.toggleAttribute("selected", false); + } + let row = this.#getRowFromElement(element); + if (element) { + element.toggleAttribute("selected", true); + element.setAttribute("aria-selected", "true"); + if (row?.hasAttribute("row-selectable")) { + row?.toggleAttribute("selected", true); + } + } + this.#setAccessibleFocus(setAccessibleFocus && element); + this.#selectedElement = element; + + let result = row?.result; + if (updateInput) { + let urlOverride = null; + if (element?.classList?.contains("urlbarView-button-help")) { + urlOverride = result.payload.helpUrl; + } else if (element?.classList?.contains("urlbarView-button")) { + // Clear the input when a button is selected. + urlOverride = ""; + } + this.input.setValueFromResult({ result, urlOverride }); + } else { + this.input.setResultForCurrentValue(result); + } + + let provider = lazy.UrlbarProvidersManager.getProvider( + result?.providerName + ); + if (provider) { + provider.tryMethod("onSelection", result, element); + } + } + + /** + * Returns the element closest to the given element that can be + * selected/picked. If the element itself can be selected, it's returned. If + * there is no such element, null is returned. + * + * @param {Element} element + * An element in the view. + * @param {object} [options] + * Options object. + * @param {boolean} [options.byMouse] + * If true, include elements that are only selectable by mouse. + * @returns {Element} + * The closest element that can be picked including the element itself, or + * null if there is no such element. + */ + #getClosestSelectableElement(element, { byMouse = false } = {}) { + let closest = element.closest( + byMouse + ? SELECTABLE_ELEMENT_SELECTOR + : KEYBOARD_SELECTABLE_ELEMENT_SELECTOR + ); + if (closest && this.#isElementVisible(closest)) { + return closest; + } + // When clicking on a gap within a row or on its border or padding, treat + // this as if the main part was clicked. + if ( + element.classList.contains("urlbarView-row") && + element.hasAttribute("row-selectable") + ) { + return element._content; + } + return null; + } + + /** + * Returns true if the given element is keyboard-selectable. + * + * @param {Element} element + * The element to test. + * @returns {boolean} + * True if the element is selectable and false if not. + */ + #isSelectableElement(element) { + return this.#getClosestSelectableElement(element) == element; + } + + /** + * Returns the first keyboard-selectable element in the view. + * + * @returns {Element} + * The first selectable element in the view. + */ + #getFirstSelectableElement() { + let element = this.#rows.firstElementChild; + if (element && !this.#isSelectableElement(element)) { + element = this.#getNextSelectableElement(element); + } + return element; + } + + /** + * Returns the last keyboard-selectable element in the view. + * + * @returns {Element} + * The last selectable element in the view. + */ + #getLastSelectableElement() { + let element = this.#rows.lastElementChild; + if (element && !this.#isSelectableElement(element)) { + element = this.#getPreviousSelectableElement(element); + } + return element; + } + + /** + * Returns the next keyboard-selectable element after the given element. If + * the element is the last selectable element, returns null. + * + * @param {Element} element + * An element in the view. + * @returns {Element} + * The next selectable element after `element` or null if `element` is the + * last selectable element. + */ + #getNextSelectableElement(element) { + let row = this.#getRowFromElement(element); + if (!row) { + return null; + } + + let next = row.nextElementSibling; + let selectables = [ + ...row.querySelectorAll(KEYBOARD_SELECTABLE_ELEMENT_SELECTOR), + ]; + if (selectables.length) { + let index = selectables.indexOf(element); + if (index < selectables.length - 1) { + next = selectables[index + 1]; + } + } + + if (next && !this.#isSelectableElement(next)) { + next = this.#getNextSelectableElement(next); + } + + return next; + } + + /** + * Returns the previous keyboard-selectable element before the given element. + * If the element is the first selectable element, returns null. + * + * @param {Element} element + * An element in the view. + * @returns {Element} + * The previous selectable element before `element` or null if `element` is + * the first selectable element. + */ + #getPreviousSelectableElement(element) { + let row = this.#getRowFromElement(element); + if (!row) { + return null; + } + + let previous = row.previousElementSibling; + let selectables = [ + ...row.querySelectorAll(KEYBOARD_SELECTABLE_ELEMENT_SELECTOR), + ]; + if (selectables.length) { + let index = selectables.indexOf(element); + if (index < 0) { + previous = selectables[selectables.length - 1]; + } else if (index > 0) { + previous = selectables[index - 1]; + } + } + + if (previous && !this.#isSelectableElement(previous)) { + previous = this.#getPreviousSelectableElement(previous); + } + + return previous; + } + + /** + * Returns the currently selected row. Useful when this.#selectedElement may + * be a non-row element, such as a descendant element of RESULT_TYPE.TIP. + * + * @returns {Element} + * The currently selected row, or ancestor row of the currently selected + * item. + */ + #getSelectedRow() { + return this.#getRowFromElement(this.#selectedElement); + } + + /** + * @param {Element} element + * An element that is potentially a row or descendant of a row. + * @returns {Element} + * The row containing `element`, or `element` itself if it is a row. + */ + #getRowFromElement(element) { + return element?.closest(".urlbarView-row"); + } + + #setAccessibleFocus(item) { + if (item) { + this.input.inputField.setAttribute("aria-activedescendant", item.id); + } else { + this.input.inputField.removeAttribute("aria-activedescendant"); + } + } + + /** + * Sets `result`'s title in `titleNode`'s DOM. + * + * @param {UrlbarResult} result + * The result for which the title is being set. + * @param {Element} titleNode + * The DOM node for the result's tile. + */ + #setResultTitle(result, titleNode) { + if (result.payload.titleL10n) { + this.#setElementL10n(titleNode, result.payload.titleL10n); + return; + } + + // TODO: `text` is intended only for WebExtensions. We should remove it and + // the WebExtensions urlbar API since we're no longer using it. + if (result.payload.text) { + titleNode.textContent = result.payload.text; + return; + } + + if (result.payload.providesSearchMode) { + // Keyword offers are the only result that require a localized title. + // We localize the title instead of using the action text as a title + // because some keyword offer results use both a title and action text + // (e.g. tab-to-search). + this.#setElementL10n(titleNode, { + id: "urlbar-result-action-search-w-engine", + args: { engine: result.payload.engine }, + }); + return; + } + + this.#removeElementL10n(titleNode); + this.#addTextContentWithHighlights( + titleNode, + result.title, + result.titleHighlights + ); + } + + /** + * Adds text content to a node, placing substrings that should be highlighted + * inside <em> nodes. + * + * @param {Element} parentNode + * The text content will be added to this node. + * @param {string} textContent + * The text content to give the node. + * @param {Array} highlights + * The matches to highlight in the text. + */ + #addTextContentWithHighlights(parentNode, textContent, highlights) { + parentNode.textContent = ""; + if (!textContent) { + return; + } + highlights = (highlights || []).concat([[textContent.length, 0]]); + let index = 0; + for (let [highlightIndex, highlightLength] of highlights) { + if (highlightIndex - index > 0) { + parentNode.appendChild( + this.document.createTextNode( + textContent.substring(index, highlightIndex) + ) + ); + } + if (highlightLength > 0) { + let strong = this.#createElement("strong"); + strong.textContent = textContent.substring( + highlightIndex, + highlightIndex + highlightLength + ); + parentNode.appendChild(strong); + } + index = highlightIndex + highlightLength; + } + } + + /** + * Adds markup for a tail suggestion prefix to a row. + * + * @param {Element} item + * The node for the result row. + * @param {UrlbarResult} result + * A UrlbarResult representing a tail suggestion. + */ + #fillTailSuggestionPrefix(item, result) { + let tailPrefixStrNode = item._elements.get("tailPrefixStr"); + let tailPrefixStr = result.payload.suggestion.substring( + 0, + result.payload.tailOffsetIndex + ); + tailPrefixStrNode.textContent = tailPrefixStr; + + let tailPrefixCharNode = item._elements.get("tailPrefixChar"); + tailPrefixCharNode.textContent = result.payload.tailPrefix; + } + + #enableOrDisableRowWrap() { + if (getBoundsWithoutFlushing(this.input.textbox).width < 650) { + this.#rows.setAttribute("wrap", "true"); + } else { + this.#rows.removeAttribute("wrap"); + } + } + + /** + * @param {Element} element + * The element + * @returns {boolean} + * Whether we track this element's overflow status in order to fade it out + * and add a tooltip when needed. + */ + #canElementOverflow(element) { + let { classList } = element; + return ( + classList.contains("urlbarView-overflowable") || + classList.contains("urlbarView-url") + ); + } + + /** + * Marks an element as overflowing or not overflowing. + * + * @param {Element} element + * The element + * @param {boolean} overflowing + * Whether the element is overflowing + */ + #setElementOverflowing(element, overflowing) { + element.toggleAttribute("overflow", overflowing); + this.#updateOverflowTooltip(element); + } + + /** + * Sets an overflowing element's tooltip, or removes the tooltip if the + * element isn't overflowing. Also optionally updates the string that should + * be used as the tooltip in case of overflow. + * + * @param {Element} element + * The element + * @param {string} [tooltip] + * The string that should be used in the tooltip. This will be stored and + * re-used next time the element overflows. + */ + #updateOverflowTooltip(element, tooltip) { + if (typeof tooltip == "string") { + element._tooltip = tooltip; + } + if (element.hasAttribute("overflow") && element._tooltip) { + element.setAttribute("title", element._tooltip); + } else { + element.removeAttribute("title"); + } + } + + /** + * If the view is open and showing a single search tip, this method picks it + * and closes the view. This counts as an engagement, so this method should + * only be called due to user interaction. + * + * @param {event} event + * The user-initiated event for the interaction. Should not be null. + * @returns {boolean} + * True if this method picked a tip, false otherwise. + */ + #pickSearchTipIfPresent(event) { + if ( + !this.isOpen || + !this.#queryContext || + this.#queryContext.results.length != 1 + ) { + return false; + } + let result = this.#queryContext.results[0]; + if (result.type != lazy.UrlbarUtils.RESULT_TYPE.TIP) { + return false; + } + let buttons = this.#rows.firstElementChild._buttons; + let tipButton = buttons.get("tip") || buttons.get("0"); + if (!tipButton) { + throw new Error("Expected a tip button"); + } + this.input.pickElement(tipButton, event); + return true; + } + + /** + * Caches some l10n strings used by the view. Strings that are already cached + * are not cached again. + * + * Note: + * Currently strings are never evicted from the cache, so do not cache + * strings whose arguments include the search string or other values that + * can cause the cache to grow unbounded. Suitable strings include those + * without arguments or those whose arguments depend on a small set of + * static values like search engine names. + */ + async #cacheL10nStrings() { + let idArgs = [ + ...this.#cacheL10nIDArgsForSearchService(), + { id: "urlbar-result-action-search-bookmarks" }, + { id: "urlbar-result-action-search-history" }, + { id: "urlbar-result-action-search-in-private" }, + { id: "urlbar-result-action-search-tabs" }, + { id: "urlbar-result-action-switch-tab" }, + { id: "urlbar-result-action-visit" }, + ]; + + if (lazy.UrlbarPrefs.get("groupLabels.enabled")) { + idArgs.push({ id: "urlbar-group-firefox-suggest" }); + if ( + (lazy.UrlbarPrefs.get("bestMatchEnabled") && + lazy.UrlbarPrefs.get("suggest.bestmatch")) || + (lazy.UrlbarPrefs.get("weatherFeatureGate") && + lazy.UrlbarPrefs.get("suggest.weather")) + ) { + idArgs.push({ id: "urlbar-group-best-match" }); + } + } + + if ( + lazy.UrlbarPrefs.get("quickSuggestEnabled") && + lazy.UrlbarPrefs.get("suggest.quicksuggest.sponsored") + ) { + idArgs.push({ id: "urlbar-result-action-sponsored" }); + } + + await this.#l10nCache.ensureAll(idArgs); + } + + /** + * A helper for l10n string caching that returns `{ id, args }` objects for + * strings that depend on the search service. + * + * @returns {Array} + * Array of `{ id, args }` objects, possibly empty. + */ + #cacheL10nIDArgsForSearchService() { + // The search service may not be initialized if the user opens the view very + // quickly after startup. Skip caching related strings in that case. Strings + // are cached opportunistically every time the view opens, so they'll be + // cached soon. We could use the search service's async methods, which + // internally await initialization, but that would allow previously cached + // out-of-date strings to appear in the view while the async calls are + // ongoing. Generally there's no reason for our string-caching paths to be + // async and it may even be a bad idea (except for the final necessary + // `this.#l10nCache.ensureAll()` call). + if (!Services.search.hasSuccessfullyInitialized) { + return []; + } + + let idArgs = []; + + let { defaultEngine, defaultPrivateEngine } = Services.search; + let engineNames = [defaultEngine?.name, defaultPrivateEngine?.name].filter( + name => name + ); + + if (defaultPrivateEngine) { + idArgs.push({ + id: "urlbar-result-action-search-in-private-w-engine", + args: { engine: defaultPrivateEngine.name }, + }); + } + + let engineStringIDs = [ + "urlbar-result-action-tabtosearch-web", + "urlbar-result-action-tabtosearch-other-engine", + "urlbar-result-action-search-w-engine", + ]; + for (let id of engineStringIDs) { + idArgs.push(...engineNames.map(name => ({ id, args: { engine: name } }))); + } + + if (lazy.UrlbarPrefs.get("groupLabels.enabled")) { + idArgs.push( + ...engineNames.map(name => ({ + id: "urlbar-group-search-suggestions", + args: { engine: name }, + })) + ); + } + + return idArgs; + } + + /** + * Sets an element's textContent or attribute to a cached l10n string. If the + * string isn't cached, then this falls back to the async `l10n.setAttributes` + * using the given l10n ID and args. The string will pop in as a result, but + * there's no way around it. + * + * @param {Element} element + * The element to set. + * @param {object} options + * Options object. + * @param {string} options.id + * The l10n string ID. + * @param {object} options.args + * The l10n string arguments. + * @param {string} options.attribute + * If you're setting an attribute string, then pass the name of the + * attribute. In that case, the string in the Fluent file should define a + * value for the attribute, like ".foo = My value for the foo attribute". + * If you're setting the element's textContent, then leave this undefined. + * @param {boolean} options.excludeArgsFromCacheKey + * Pass true if the string was cached using a key that excluded arguments. + */ + #setElementL10n( + element, + { + id, + args = undefined, + attribute = undefined, + excludeArgsFromCacheKey = false, + } + ) { + let message = this.#l10nCache.get({ id, args, excludeArgsFromCacheKey }); + if (message) { + element.removeAttribute("data-l10n-id"); + if (attribute) { + element.setAttribute(attribute, message.attributes[attribute]); + } else { + element.textContent = message.value; + } + } else { + if (attribute) { + element.setAttribute("data-l10n-attrs", attribute); + } + this.document.l10n.setAttributes(element, id, args); + } + } + + /** + * Removes textContent and attributes set by `#setElementL10n`. + * + * @param {Element} element + * The element that should be acted on + * @param {object} options + * Options object + * @param {string} [options.attribute] + * If you passed an attribute to `#setElementL10n`, then pass it here too. + */ + #removeElementL10n(element, { attribute = undefined } = {}) { + if (attribute) { + element.removeAttribute(attribute); + element.removeAttribute("data-l10n-attrs"); + } else { + element.textContent = ""; + } + element.removeAttribute("data-l10n-id"); + } + + get #isShowingZeroPrefix() { + return !!this.#zeroPrefixStopwatchInstance; + } + + #setIsShowingZeroPrefix(isShowing) { + if (!!isShowing == !!this.#zeroPrefixStopwatchInstance) { + return; + } + + if (!isShowing) { + TelemetryStopwatch.finish( + ZERO_PREFIX_HISTOGRAM_DWELL_TIME, + this.#zeroPrefixStopwatchInstance + ); + this.#zeroPrefixStopwatchInstance = null; + return; + } + + this.#zeroPrefixStopwatchInstance = {}; + TelemetryStopwatch.start( + ZERO_PREFIX_HISTOGRAM_DWELL_TIME, + this.#zeroPrefixStopwatchInstance + ); + + Services.telemetry.scalarAdd(ZERO_PREFIX_SCALAR_EXPOSURE, 1); + } + + /** + * @param {UrlbarResult} result + * The result to get menu commands for. + * @returns {Array} + * Array of menu commands available for the result, null if there are none. + */ + #getResultMenuCommands(result) { + if (!lazy.UrlbarPrefs.get("resultMenu")) { + return null; + } + if (this.#resultMenuCommands.has(result)) { + return this.#resultMenuCommands.get(result); + } + + let commands = lazy.UrlbarProvidersManager.getProvider( + result.providerName + )?.tryMethod("getResultCommands", result); + if (commands) { + this.#resultMenuCommands.set(result, commands); + return commands; + } + + commands = []; + if ( + result.source == lazy.UrlbarUtils.RESULT_SOURCE.HISTORY && + !result.autofill + ) { + commands.push( + { + name: RESULT_MENU_COMMANDS.DISMISS, + l10n: { id: "urlbar-result-menu-remove-from-history" }, + }, + { + name: RESULT_MENU_COMMANDS.HELP, + l10n: { id: "urlbar-result-menu-learn-more" }, + } + ); + } + if (result.payload.isBlockable) { + commands.push({ + name: RESULT_MENU_COMMANDS.DISMISS, + l10n: result.payload.blockL10n, + }); + } + if (result.payload.helpUrl) { + commands.push({ + name: RESULT_MENU_COMMANDS.HELP, + l10n: result.payload.helpL10n, + }); + } + let rv = commands.length ? commands : null; + this.#resultMenuCommands.set(result, rv); + return rv; + } + + #populateResultMenu( + menupopup = this.resultMenu, + commands = this.#getResultMenuCommands(this.#resultMenuResult) + ) { + menupopup.textContent = ""; + for (let data of commands) { + if (data.children) { + let popup = this.document.createXULElement("menupopup"); + this.#populateResultMenu(popup, data.children); + let menu = this.document.createXULElement("menu"); + this.#setElementL10n(menu, data.l10n); + menu.appendChild(popup); + menupopup.appendChild(menu); + continue; + } + if (data.name == "separator") { + menupopup.appendChild(this.document.createXULElement("menuseparator")); + continue; + } + let menuitem = this.document.createXULElement("menuitem"); + menuitem.dataset.command = data.name; + menuitem.classList.add("urlbarView-result-menuitem"); + this.#setElementL10n(menuitem, data.l10n); + menupopup.appendChild(menuitem); + } + } + + // Event handlers below. + + on_SelectedOneOffButtonChanged() { + if (!this.isOpen || !this.#queryContext) { + return; + } + + let engine = this.oneOffSearchButtons.selectedButton?.engine; + let source = this.oneOffSearchButtons.selectedButton?.source; + + let localSearchMode; + if (source) { + localSearchMode = lazy.UrlbarUtils.LOCAL_SEARCH_MODES.find( + m => m.source == source + ); + } + + for (let item of this.#rows.children) { + let result = item.result; + + let isPrivateSearchWithoutPrivateEngine = + result.payload.inPrivateWindow && !result.payload.isPrivateEngine; + let isSearchHistory = + result.type == lazy.UrlbarUtils.RESULT_TYPE.SEARCH && + result.source == lazy.UrlbarUtils.RESULT_SOURCE.HISTORY; + let isSearchSuggestion = result.payload.suggestion && !isSearchHistory; + + // For one-off buttons having a source, we update the action for the + // heuristic result, or for any non-heuristic that is a remote search + // suggestion or a private search with no private engine. + if ( + !result.heuristic && + !isSearchSuggestion && + !isPrivateSearchWithoutPrivateEngine + ) { + continue; + } + + // If there is no selected button and we are in full search mode, it is + // because the user just confirmed a one-off button, thus starting a new + // query. Don't change the heuristic result because it would be + // immediately replaced with the search mode heuristic, causing flicker. + if ( + result.heuristic && + !engine && + !localSearchMode && + this.input.searchMode && + !this.input.searchMode.isPreview + ) { + continue; + } + + let action = item.querySelector(".urlbarView-action"); + let favicon = item.querySelector(".urlbarView-favicon"); + let title = item.querySelector(".urlbarView-title"); + + // If a one-off button is the only selection, force the heuristic result + // to show its action text, so the engine name is visible. + if ( + result.heuristic && + !this.selectedElement && + (localSearchMode || engine) + ) { + item.setAttribute("show-action-text", "true"); + } else { + item.removeAttribute("show-action-text"); + } + + // If an engine is selected, update search results to use that engine. + // Otherwise, restore their original engines. + if (result.type == lazy.UrlbarUtils.RESULT_TYPE.SEARCH) { + if (engine) { + if (!result.payload.originalEngine) { + result.payload.originalEngine = result.payload.engine; + } + result.payload.engine = engine.name; + } else if (result.payload.originalEngine) { + result.payload.engine = result.payload.originalEngine; + delete result.payload.originalEngine; + } + } + + // If the result is the heuristic and a one-off is selected (i.e., + // localSearchMode || engine), then restyle it to look like a search + // result; otherwise, remove such styling. For restyled results, we + // override the usual result-picking behaviour in UrlbarInput.pickResult. + if (result.heuristic) { + title.textContent = + localSearchMode || engine + ? this.#queryContext.searchString + : result.title; + + // Set the restyled-search attribute so the action text and title + // separator are shown or hidden via CSS as appropriate. + if (localSearchMode || engine) { + item.setAttribute("restyled-search", "true"); + } else { + item.removeAttribute("restyled-search"); + } + } + + // Update result action text. + if (localSearchMode) { + // Update the result action text for a local one-off. + let name = lazy.UrlbarUtils.getResultSourceName(localSearchMode.source); + this.#setElementL10n(action, { + id: `urlbar-result-action-search-${name}`, + }); + if (result.heuristic) { + item.setAttribute("source", name); + } + } else if (engine && !result.payload.inPrivateWindow) { + // Update the result action text for an engine one-off. + this.#setElementL10n(action, { + id: "urlbar-result-action-search-w-engine", + args: { engine: engine.name }, + }); + } else { + // No one-off is selected. If we replaced the action while a one-off + // button was selected, it should be restored. + if (item._originalActionSetter) { + item._originalActionSetter(); + if (result.heuristic) { + favicon.src = result.payload.icon || lazy.UrlbarUtils.ICON.DEFAULT; + } + } else { + console.error("An item is missing the action setter"); + } + item.removeAttribute("source"); + } + + // Update result favicons. + let iconOverride = localSearchMode?.icon || engine?.iconURI?.spec; + if (!iconOverride && (localSearchMode || engine)) { + // For one-offs without an icon, do not allow restyled URL results to + // use their own icons. + iconOverride = lazy.UrlbarUtils.ICON.SEARCH_GLASS; + } + if ( + result.heuristic || + (result.payload.inPrivateWindow && !result.payload.isPrivateEngine) + ) { + // If we just changed the engine from the original engine and it had an + // icon, then make sure the result now uses the new engine's icon or + // failing that the default icon. If we changed it back to the original + // engine, go back to the original or default icon. + favicon.src = this.#iconForResult(result, iconOverride); + } + } + } + + on_blur(event) { + // If the view is open without the input being focused, it will not close + // automatically when the window loses focus. We might be in this state + // after a Search Tip is shown on an engine homepage. + if (!lazy.UrlbarPrefs.get("ui.popup.disable_autohide")) { + this.close(); + } + } + + on_mousedown(event) { + if (event.button == 2) { + // Ignore right clicks. + return; + } + + let element = this.#getClosestSelectableElement(event.target, { + byMouse: true, + }); + if (!element) { + // Ignore clicks on elements that can't be selected/picked. + return; + } + + this.window.top.addEventListener("mouseup", this); + + // Select the element and open a speculative connection unless it's a + // button. Buttons are special in the two ways listed below. Some buttons + // may be exceptions to these two criteria, but to provide a consistent UX + // and avoid complexity, we apply this logic to all of them. + // + // (1) Some buttons do not close the view when clicked, like the block and + // menu buttons. Clicking these buttons should not have any side effects in + // the view or input beyond their primary purpose. For example, the block + // button should remove the row but it should not change the input value or + // page proxy state, and ideally it shouldn't change the input's selection + // or caret either. It probably also shouldn't change the view's selection + // (if the removed row isn't selected), but that may be more debatable. + // + // It may be possible to select buttons on mousedown and then clear the + // selection on mouseup as usual while meeting these requirements. However, + // it's not simple because clearing the selection has surprising side + // effects in the input like the ones mentioned above. + // + // (2) Most buttons don't have URLs, so there's nothing to speculatively + // connect to. If a button does have a URL, it's typically different from + // the primary URL of its related result, so it's not critical to open a + // speculative connection anyway. + if (!element.classList.contains("urlbarView-button")) { + this.#mousedownSelectedElement = element; + this.#selectElement(element, { updateInput: false }); + this.controller.speculativeConnect( + this.selectedResult, + this.#queryContext, + "mousedown" + ); + } + } + + on_mouseup(event) { + if (event.button == 2) { + // Ignore right clicks. + return; + } + + this.window.top.removeEventListener("mouseup", this); + + // When mouseup outside of browser, as the target will not be element, + // ignore it. + let element = + event.target.nodeType === event.target.ELEMENT_NODE + ? this.#getClosestSelectableElement(event.target, { byMouse: true }) + : null; + if (element) { + this.input.pickElement(element, event); + } + + // If the element that was selected on mousedown is still in the view, clear + // the selection. Do it after calling `pickElement()` above since code that + // reacts to picks may assume the selected element is the picked element. + // + // If the element is no longer in the view, then it must be because its row + // was removed in response to the pick. If the element was not a button, we + // selected it on mousedown and then `onQueryResultRemoved()` selected the + // next row; we shouldn't unselect it here. If the element was a button, + // then we didn't select anything on mousedown; clearing the selection seems + // like it would be harmless, but it has side effects in the input we want + // to avoid (see `on_mousedown()`). + if (this.#mousedownSelectedElement?.isConnected) { + this.#selectElement(null); + } + this.#mousedownSelectedElement = null; + } + + on_overflow(event) { + if ( + event.detail == 1 /* horizontal overflow */ && + this.#canElementOverflow(event.target) + ) { + this.#setElementOverflowing(event.target, true); + } + } + + on_underflow(event) { + if ( + event.detail == 1 /* horizontal underflow */ && + this.#canElementOverflow(event.target) + ) { + this.#setElementOverflowing(event.target, false); + } + } + + on_resize() { + this.#enableOrDisableRowWrap(); + } + + on_command(event) { + if (event.currentTarget == this.resultMenu) { + let result = this.#resultMenuResult; + this.#resultMenuResult = null; + let menuitem = event.target; + switch (menuitem.dataset.command) { + case RESULT_MENU_COMMANDS.HELP: + menuitem.dataset.url = + result.payload.helpUrl || + Services.urlFormatter.formatURLPref("app.support.baseURL") + + "awesome-bar-result-menu"; + break; + } + this.input.pickResult(result, event, menuitem); + } + } + + on_popupshowing(event) { + if (event.target == this.resultMenu) { + this.#populateResultMenu(); + } + } + + /** + * Add result to exposure set on the controller. + * + * @param {UrlbarResult} result UrlbarResult for which to record an exposure. + */ + #addExposure(result) { + this.controller.engagementEvent.addExposure(result); + } +} + +/** + * Implements a QueryContext cache, working as a circular buffer, when a new + * entry is added at the top, the last item is remove from the bottom. + */ +class QueryContextCache { + #cache; + #size; + #topSitesContext; + #topSitesListener; + + /** + * Constructor. + * + * @param {number} size The number of entries to keep in the cache. + */ + constructor(size) { + this.#size = size; + this.#cache = []; + + // We store the top-sites context separately since it will often be needed + // and therefore shouldn't be evicted except when the top sites change. + this.#topSitesContext = null; + this.#topSitesListener = () => (this.#topSitesContext = null); + lazy.UrlbarProviderTopSites.addTopSitesListener(this.#topSitesListener); + } + + /** + * @returns {number} The number of entries to keep in the cache. + */ + get size() { + return this.#size; + } + + /** + * @returns {UrlbarQueryContext} The cached top-sites context or null if none. + */ + get topSitesContext() { + return this.#topSitesContext; + } + + /** + * Adds a new entry to the cache. + * + * @param {UrlbarQueryContext} queryContext The UrlbarQueryContext to add. + * Note: QueryContexts without results are ignored and not added. Contexts + * with an empty searchString that are not the top-sites context are + * also ignored. + */ + put(queryContext) { + if (!queryContext.results.length) { + return; + } + + let searchString = queryContext.searchString; + if (!searchString) { + // Cache the context if it's the top-sites context. An empty search string + // doesn't necessarily imply top sites since there are other queries that + // use it too, like search mode. If any result is from the top-sites + // provider, assume the context is top sites. + if ( + queryContext.results?.some( + r => r.providerName == lazy.UrlbarProviderTopSites.name + ) + ) { + this.#topSitesContext = queryContext; + } + return; + } + + let index = this.#cache.findIndex(e => e.searchString == searchString); + if (index != -1) { + if (this.#cache[index] == queryContext) { + return; + } + this.#cache.splice(index, 1); + } + if (this.#cache.unshift(queryContext) > this.size) { + this.#cache.length = this.size; + } + } + + get(searchString) { + return this.#cache.find(e => e.searchString == searchString); + } +} + +/** + * Adds a dynamic result type stylesheet to a specified window. + * + * @param {Window} window + * The window to which to add the stylesheet. + * @param {string} stylesheetURL + * The stylesheet's URL. + */ +async function addDynamicStylesheet(window, stylesheetURL) { + // Try-catch all of these so that failing to load a stylesheet doesn't break + // callers and possibly the urlbar. If a stylesheet does fail to load, the + // dynamic results that depend on it will appear broken, but at least we + // won't break the whole urlbar. + try { + let uri = Services.io.newURI(stylesheetURL); + let sheet = await lazy.styleSheetService.preloadSheetAsync( + uri, + Ci.nsIStyleSheetService.AGENT_SHEET + ); + window.windowUtils.addSheet(sheet, Ci.nsIDOMWindowUtils.AGENT_SHEET); + } catch (ex) { + console.error(`Error adding dynamic stylesheet: ${ex}`); + } +} + +/** + * Removes a dynamic result type stylesheet from the view's window. + * + * @param {Window} window + * The window from which to remove the stylesheet. + * @param {string} stylesheetURL + * The stylesheet's URL. + */ +function removeDynamicStylesheet(window, stylesheetURL) { + // Try-catch for the same reason as desribed in addDynamicStylesheet. + try { + window.windowUtils.removeSheetUsingURIString( + stylesheetURL, + Ci.nsIDOMWindowUtils.AGENT_SHEET + ); + } catch (ex) { + console.error(`Error removing dynamic stylesheet: ${ex}`); + } +} |