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Diffstat (limited to 'browser/components/urlbar/UrlbarView.jsm')
| -rw-r--r-- | browser/components/urlbar/UrlbarView.jsm | 2232 |
1 files changed, 2232 insertions, 0 deletions
diff --git a/browser/components/urlbar/UrlbarView.jsm b/browser/components/urlbar/UrlbarView.jsm new file mode 100644 index 0000000000..c4c41e2c2d --- /dev/null +++ b/browser/components/urlbar/UrlbarView.jsm @@ -0,0 +1,2232 @@ +/* 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/. */ + +"use strict"; + +var EXPORTED_SYMBOLS = ["UrlbarView"]; + +const { XPCOMUtils } = ChromeUtils.import( + "resource://gre/modules/XPCOMUtils.jsm" +); +XPCOMUtils.defineLazyModuleGetters(this, { + BrowserWindowTracker: "resource:///modules/BrowserWindowTracker.jsm", + Services: "resource://gre/modules/Services.jsm", + UrlbarPrefs: "resource:///modules/UrlbarPrefs.jsm", + UrlbarProvidersManager: "resource:///modules/UrlbarProvidersManager.jsm", + UrlbarSearchOneOffs: "resource:///modules/UrlbarSearchOneOffs.jsm", + UrlbarTokenizer: "resource:///modules/UrlbarTokenizer.jsm", + UrlbarUtils: "resource:///modules/UrlbarUtils.jsm", +}); + +XPCOMUtils.defineLazyServiceGetter( + this, + "styleSheetService", + "@mozilla.org/content/style-sheet-service;1", + "nsIStyleSheetService" +); + +// Stale rows are removed on a timer with this timeout. Tests can override this +// by setting UrlbarView.removeStaleRowsTimeout. +const DEFAULT_REMOVE_STALE_ROWS_TIMEOUT = 400; + +// Query selector for selectable elements in tip and dynamic results. +const SELECTABLE_ELEMENT_SELECTOR = "[role=button], [selectable=true]"; + +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. + */ +class UrlbarView { + /** + * @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._rows.addEventListener("mousedown", this); + this._rows.addEventListener("mouseup", 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); + + // `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); + + for (let viewTemplate of UrlbarView.dynamicViewTemplatesByName.values()) { + if (viewTemplate.stylesheet) { + addDynamicStylesheet(this.window, viewTemplate.stylesheet); + } + } + } + + get oneOffSearchButtons() { + if (!this._oneOffSearchButtons) { + this._oneOffSearchButtons = new 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() { + return !( + this._queryContext && + this._queryContext.results[0] && + this._queryContext.results[0].heuristic + ); + } + + 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 val; + } + + 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.`); + } + this._selectElement(items[val]); + return val; + } + + get selectedElementIndex() { + if (!this.isOpen || !this._selectedElement) { + return -1; + } + + return this._selectedElement.elementIndex; + } + + set selectedElementIndex(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 val; + } + + let selectableElement = this._getFirstSelectableElement(); + while (selectableElement && selectableElement.elementIndex != val) { + selectableElement = this._getNextSelectableElement(selectableElement); + } + + if (!selectableElement) { + throw new Error(`UrlbarView: Index ${val} is out of bounds.`); + } + + this._selectElement(selectableElement); + return val; + } + + /** + * @returns {UrlbarResult} + * The currently selected result. + */ + get selectedResult() { + if (!this.isOpen) { + return null; + } + + let selectedRow = this._getSelectedRow(); + + if (!selectedRow) { + return null; + } + + return selectedRow.result; + } + + /** + * @returns {Element} + * The currently selected element. + */ + get selectedElement() { + if (!this.isOpen) { + return null; + } + + return this._selectedElement; + } + + /** + * 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 {number} + * The number of selectable elements in the view. + */ + get visibleElementCount() { + let sum = 0; + let element = this._getFirstSelectableElement(); + while (element) { + if (this._isElementVisible(element)) { + sum++; + } + element = this._getNextSelectableElement(element); + } + 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) { + if (!this.isOpen) { + return null; + } + + let row = this._getRowFromElement(element); + + if (!row) { + return null; + } + + return row.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; + } + + /** + * 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. + * @returns {Element} + * The closest element that can be picked including the element itself, or + * null if there is no such element. + */ + getClosestSelectableElement(element) { + let row = element.closest(".urlbarView-row"); + if (!row) { + return null; + } + let closest = row; + if ( + row.result.type == UrlbarUtils.RESULT_TYPE.TIP || + row.result.type == UrlbarUtils.RESULT_TYPE.DYNAMIC + ) { + closest = element.closest(SELECTABLE_ELEMENT_SELECTOR); + } + return this._isElementVisible(closest) ? closest : null; + } + + /** + * @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 {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." + ); + } + + // 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 skipAnnouncement = + selectedElt?.result?.providerName == "TabToSearch" && + !this._announceTabToSearchOnSelection && + userPressedTab && + 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; + }; + + // 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(); + } + + 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; + } + if (!this._isElementVisible(next)) { + continue; + } + selectedElement = next; + } + this._selectElement(selectedElement, { + setAccessibleFocus: !isSkippableTabToSearchAnnounce(selectedElement), + }); + } + + removeAccessibleFocus() { + this._setAccessibleFocus(null); + } + + clear() { + this._rows.textContent = ""; + this.panel.setAttribute("noresults", "true"); + this.clearSelection(); + } + + /** + * Closes the view, cancelling the query if necessary. + * @param {boolean} [elementPicked] + * True if the view is being closed because a result was picked. + */ + close(elementPicked = false) { + this.controller.cancelQuery(); + + if (!this.isOpen) { + return; + } + + // 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.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); + } + + /** + * 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 {Event} queryOptions Options to use when starting a new query. The + * event property is mandatory for proper telemetry tracking. + * @returns {boolean} Whether the view was opened. + */ + autoOpen(queryOptions = {}) { + if (this._pickSearchTipIfPresent(queryOptions.event)) { + return false; + } + + if (!queryOptions.event) { + return false; + } + + if ( + !this.input.value || + this.input.getAttribute("pageproxystate") == "valid" + ) { + if ( + !this.isOpen && + ["mousedown", "command"].includes(queryOptions.event.type) + ) { + this.input.startQuery(queryOptions); + 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 && queryOptions.event.type != "tabswitch") { + return false; + } + + if ( + this._rows.firstElementChild && + this._queryContext.searchString == this.input.value + ) { + // We can reuse the current results. + queryOptions.allowAutofill = this._queryContext.allowAutofill; + } else { + // To reduce results flickering, try to reuse a cached UrlbarQueryContext. + 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"; + + if ( + this._queryContext && + this._queryContext.results && + this._queryContext.results.length + ) { + 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); + return true; + } + + // UrlbarController listener methods. + onQueryStarted(queryContext) { + this._queryWasCancelled = false; + this._queryUpdatedResults = false; + this._openPanelInstance = null; + if (!queryContext.searchString) { + this._previousTabToSearchEngine = null; + } + this._startRemoveStaleRowsTimer(); + } + + onQueryCancelled(queryContext) { + this._queryWasCancelled = true; + this._cancelRemoveStaleRowsTimer(); + } + + onQueryFinished(queryContext) { + this._cancelRemoveStaleRowsTimer(); + if (this._queryWasCancelled) { + return; + } + + // If the query finished and it returned some results, remove stale rows. + if (this._queryUpdatedResults) { + this._removeStaleRows(); + return; + } + + // The query didn't return any results. Clear the view. + this.clear(); + + // 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(queryContext); + + 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) && + queryContext.trimmedSearchString[0] != "@" && + (queryContext.trimmedSearchString[0] != + 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. + this._selectElement(this._getFirstSelectableElement(), { + updateInput: false, + setAccessibleFocus: this.controller._userSelectionBehavior == "arrow", + }); + } 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" && + UrlbarPrefs.get("accessibility.tabToSearch.announceResults") && + this._previousTabToSearchEngine != secondResult.payload.engine + ) { + let engine = secondResult.payload.engine; + this.window.A11yUtils.announce({ + id: UrlbarUtils.WEB_ENGINE_NAMES.has(engine) + ? "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; + } + } + + /** + * 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(). + * {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 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 BrowserWindowTracker.orderedWindows) { + removeDynamicStylesheet(window, viewTemplate.stylesheet); + } + } + } + + // Private methods below. + + _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.setAttribute("open", "true"); + this.input.startLayoutExtend(); + + this.window.addEventListener("resize", this); + this.window.addEventListener("blur", this); + + this.controller.notify(this.controller.NOTIFICATIONS.VIEW_OPEN); + } + + /** + * 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 == 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 {number} firstSearchSuggestionIndex Index of the first search suggestion. + * @param {number} lastSearchSuggestionIndex Index of the last search suggestion. + * @returns {boolean} Whether the row can be updated to this result. + */ + _rowCanUpdateToResult( + rowIndex, + result, + firstSearchSuggestionIndex, + lastSearchSuggestionIndex + ) { + // The heuristic result must always be current, thus it's always compatible. + if (result.heuristic) { + return true; + } + let row = this._rows.children[rowIndex]; + 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 && rowIndex >= firstSearchSuggestionIndex; + } + + _updateResults(queryContext) { + // 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. + + // Find where are existing search suggestions. + let firstSearchSuggestionIndex = -1; + let lastSearchSuggestionIndex = -1; + for (let i = 0; i < this._rows.children.length; ++i) { + let row = this._rows.children[i]; + // Mark every row as stale, _updateRow will unmark them later. + row.setAttribute("stale", "true"); + // Skip any row that isn't a search suggestion, or is non-visible because + // over maxResults. + if ( + row.result.heuristic || + i >= queryContext.maxResults || + !this._resultIsSearchSuggestion(row.result) + ) { + continue; + } + if (firstSearchSuggestionIndex == -1) { + firstSearchSuggestionIndex = i; + } + lastSearchSuggestionIndex = i; + } + + // 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 = queryContext.results; + let resultIndex = 0; + // We can have more rows than the visible ones. + for ( + let rowIndex = 0; + rowIndex < this._rows.children.length && resultIndex < results.length; + ++rowIndex + ) { + let row = this._rows.children[rowIndex]; + let result = results[resultIndex]; + if ( + this._rowCanUpdateToResult( + rowIndex, + result, + firstSearchSuggestionIndex, + lastSearchSuggestionIndex + ) + ) { + this._updateRow(row, result); + resultIndex++; + } + } + // Add remaining results, if we have fewer rows than results. + for (; resultIndex < results.length; ++resultIndex) { + let row = this._createRow(); + this._updateRow(row, results[resultIndex]); + // Due to stale rows, we may have more rows than maxResults, thus we must + // hide them, and we'll revert this when stale rows are removed. + if (this._rows.children.length >= queryContext.maxResults) { + this._setRowVisibility(row, false); + } + this._rows.appendChild(row); + } + + this._updateIndices(); + } + + _createRow() { + let item = this._createElement("div"); + item.className = "urlbarView-row"; + item.setAttribute("role", "option"); + item._elements = new Map(); + return item; + } + + _createRowContent(item) { + // 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.className = "urlbarView-title"; + noWrap.appendChild(title); + item._elements.set("title", title); + + let tagsContainer = this._createElement("span"); + tagsContainer.className = "urlbarView-tags"; + 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); + } + + _createRowContentForTip(item) { + // We use role="group" so screen readers will read the group's label when a + // button inside it gets focus. (Screen readers don't do this for + // role="option".) We set aria-labelledby for the group in _updateIndices. + item._content.setAttribute("role", "group"); + + let favicon = this._createElement("img"); + favicon.className = "urlbarView-favicon"; + favicon.setAttribute("data-l10n-id", "urlbar-tip-icon-description"); + item._content.appendChild(favicon); + item._elements.set("favicon", favicon); + + let title = this._createElement("span"); + title.className = "urlbarView-title"; + item._content.appendChild(title); + item._elements.set("title", title); + + let buttonSpacer = this._createElement("span"); + buttonSpacer.className = "urlbarView-tip-button-spacer"; + item._content.appendChild(buttonSpacer); + + let tipButton = this._createElement("span"); + tipButton.className = "urlbarView-tip-button"; + tipButton.setAttribute("role", "button"); + item._content.appendChild(tipButton); + item._elements.set("tipButton", tipButton); + + let helpIcon = this._createElement("span"); + helpIcon.className = "urlbarView-tip-help"; + helpIcon.setAttribute("role", "button"); + helpIcon.setAttribute("data-l10n-id", "urlbar-tip-help-icon"); + item._elements.set("helpButton", helpIcon); + item._content.appendChild(helpIcon); + + // 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); + } + + _createRowContentForDynamicType(item, result) { + let { dynamicType } = result.payload; + let viewTemplate = UrlbarView.dynamicViewTemplatesByName.get(dynamicType); + this._buildViewForDynamicType( + dynamicType, + item._content, + item._elements, + viewTemplate + ); + } + + _buildViewForDynamicType(type, parentNode, elementsByName, template) { + // Add classes to parentNode's classList. + for (let className of template.classList || []) { + parentNode.classList.add(className); + } + // Set attributes on parentNode. + for (let [name, value] of Object.entries(template.attributes || {})) { + if (name == "id") { + // We do not allow dynamic results to set IDs for their Nodes. IDs are + // managed by the view to ensure they are unique. + Cu.reportError( + "Dynamic results are prohibited from setting their own IDs." + ); + continue; + } + parentNode.setAttribute(name, value); + } + 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); + } + } + + _updateRow(item, result) { + let oldResult = item.result; + let oldResultType = item.result && item.result.type; + item.result = result; + item.removeAttribute("stale"); + item.id = getUniqueId("urlbarView-row-"); + + let needsNewContent = + oldResultType === undefined || + (oldResultType == UrlbarUtils.RESULT_TYPE.TIP) != + (result.type == UrlbarUtils.RESULT_TYPE.TIP) || + (oldResultType == UrlbarUtils.RESULT_TYPE.DYNAMIC) != + (result.type == UrlbarUtils.RESULT_TYPE.DYNAMIC) || + (oldResultType == UrlbarUtils.RESULT_TYPE.DYNAMIC && + result.type == UrlbarUtils.RESULT_TYPE.DYNAMIC && + oldResult.dynamicType != result.dynamicType); + + if (needsNewContent) { + if (item._content) { + item._content.remove(); + item._elements.clear(); + } + item._content = this._createElement("span"); + item._content.className = "urlbarView-row-inner"; + item.appendChild(item._content); + item.removeAttribute("dynamicType"); + if (item.result.type == UrlbarUtils.RESULT_TYPE.TIP) { + this._createRowContentForTip(item); + } else if (item.result.type == UrlbarUtils.RESULT_TYPE.DYNAMIC) { + this._createRowContentForDynamicType(item, result); + } else { + this._createRowContent(item); + } + } + + if ( + result.type == UrlbarUtils.RESULT_TYPE.SEARCH && + !result.payload.providesSearchMode && + !result.payload.inPrivateWindow + ) { + item.setAttribute("type", "search"); + } else if (result.type == UrlbarUtils.RESULT_TYPE.REMOTE_TAB) { + item.setAttribute("type", "remotetab"); + } else if (result.type == UrlbarUtils.RESULT_TYPE.TAB_SWITCH) { + item.setAttribute("type", "switchtab"); + } else if (result.type == UrlbarUtils.RESULT_TYPE.TIP) { + item.setAttribute("type", "tip"); + this._updateRowForTip(item, result); + return; + } else if (result.source == UrlbarUtils.RESULT_SOURCE.BOOKMARKS) { + item.setAttribute("type", "bookmark"); + } else if (result.type == UrlbarUtils.RESULT_TYPE.DYNAMIC) { + item.setAttribute("type", "dynamic"); + this._updateRowForDynamicType(item, result); + return; + } else if (result.providerName == "TabToSearch") { + item.setAttribute("type", "tabtosearch"); + } else { + item.removeAttribute("type"); + } + + let favicon = item._elements.get("favicon"); + if ( + result.type == UrlbarUtils.RESULT_TYPE.SEARCH || + result.type == UrlbarUtils.RESULT_TYPE.KEYWORD + ) { + favicon.src = this._iconForResult(result); + } else { + favicon.src = result.payload.icon || 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"); + } + + title._tooltip = result.title; + if (title.hasAttribute("overflow")) { + title.setAttribute("title", title._tooltip); + } + + let tagsContainer = item._elements.get("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; + switch (result.type) { + case UrlbarUtils.RESULT_TYPE.TAB_SWITCH: + actionSetter = () => { + this.document.l10n.setAttributes( + action, + "urlbar-result-action-switch-tab" + ); + }; + setURL = true; + break; + case UrlbarUtils.RESULT_TYPE.REMOTE_TAB: + actionSetter = () => { + action.removeAttribute("data-l10n-id"); + action.textContent = result.payload.device; + }; + setURL = true; + break; + case UrlbarUtils.RESULT_TYPE.SEARCH: + if (result.payload.inPrivateWindow) { + if (result.payload.isPrivateEngine) { + actionSetter = () => { + this.document.l10n.setAttributes( + action, + "urlbar-result-action-search-in-private-w-engine", + { engine: result.payload.engine } + ); + }; + } else { + actionSetter = () => { + this.document.l10n.setAttributes( + action, + "urlbar-result-action-search-in-private" + ); + }; + } + } else if (result.providerName == "TabToSearch") { + actionSetter = () => { + this.document.l10n.setAttributes( + action, + UrlbarUtils.WEB_ENGINE_NAMES.has(result.payload.engine) + ? "urlbar-result-action-tabtosearch-web" + : "urlbar-result-action-tabtosearch-other-engine", + { engine: result.payload.engine } + ); + }; + } else if (!result.payload.providesSearchMode) { + actionSetter = () => { + this.document.l10n.setAttributes( + action, + "urlbar-result-action-search-w-engine", + { engine: result.payload.engine } + ); + }; + } + break; + case UrlbarUtils.RESULT_TYPE.KEYWORD: + isVisitAction = result.payload.input.trim() == result.payload.keyword; + break; + case UrlbarUtils.RESULT_TYPE.OMNIBOX: + actionSetter = () => { + action.removeAttribute("data-l10n-id"); + action.textContent = result.payload.content; + }; + break; + default: + if (result.heuristic) { + isVisitAction = true; + } else { + setURL = true; + } + break; + } + + 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 != UrlbarUtils.RESULT_TYPE.TAB_SWITCH + ) { + item.toggleAttribute("sponsored", true); + actionSetter = () => { + this.document.l10n.setAttributes( + action, + "urlbar-result-action-sponsored" + ); + }; + } else { + item.removeAttribute("sponsored"); + } + + let url = item._elements.get("url"); + if (setURL) { + item.setAttribute("has-url", "true"); + this._addTextContentWithHighlights( + url, + result.payload.displayUrl, + result.payloadHighlights.displayUrl || [] + ); + url._tooltip = result.payload.displayUrl; + } else { + item.removeAttribute("has-url"); + url.textContent = ""; + url._tooltip = ""; + } + if (url.hasAttribute("overflow")) { + url.setAttribute("title", url._tooltip); + } + + if (isVisitAction) { + actionSetter = () => { + this.document.l10n.setAttributes(action, "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 = () => { + action.removeAttribute("data-l10n-id"); + action.textContent = ""; + }; + item._originalActionSetter(); + item.removeAttribute("has-action"); + } + + if (!title.hasAttribute("isurl")) { + title.setAttribute("dir", "auto"); + } else { + title.removeAttribute("dir"); + } + } + + _iconForResult(result, iconUrlOverride = null) { + return ( + (result.source == UrlbarUtils.RESULT_SOURCE.HISTORY && + (result.type == UrlbarUtils.RESULT_TYPE.SEARCH || + result.type == UrlbarUtils.RESULT_TYPE.KEYWORD) && + UrlbarUtils.ICON.HISTORY) || + iconUrlOverride || + result.payload.icon || + ((result.type == UrlbarUtils.RESULT_TYPE.SEARCH || + result.type == UrlbarUtils.RESULT_TYPE.KEYWORD) && + UrlbarUtils.ICON.SEARCH_GLASS) || + UrlbarUtils.ICON.DEFAULT + ); + } + + _updateRowForTip(item, result) { + let favicon = item._elements.get("favicon"); + favicon.src = result.payload.icon || UrlbarUtils.ICON.TIP; + favicon.id = item.id + "-icon"; + + let title = item._elements.get("title"); + title.id = item.id + "-title"; + // Add-ons will provide text, rather than l10n ids. + if (result.payload.textData) { + this.document.l10n.setAttributes( + title, + result.payload.textData.id, + result.payload.textData.args + ); + } else { + title.textContent = result.payload.text; + } + + item._content.setAttribute("aria-labelledby", `${favicon.id} ${title.id}`); + + let tipButton = item._elements.get("tipButton"); + tipButton.id = item.id + "-tip-button"; + // Add-ons will provide buttonText, rather than l10n ids. + if (result.payload.buttonTextData) { + this.document.l10n.setAttributes( + tipButton, + result.payload.buttonTextData.id, + result.payload.buttonTextData.args + ); + } else { + tipButton.textContent = result.payload.buttonText; + } + + let helpIcon = item._elements.get("helpButton"); + helpIcon.id = item.id + "-tip-help"; + helpIcon.style.display = result.payload.helpUrl ? "" : "none"; + + if (result.providerName == "UrlbarProviderSearchTips") { + // For a11y, we treat search tips as alerts. We use A11yUtils.announce + // instead of role="alert" because role="alert" will only fire an alert + // event when the alert (or something inside it) is the root of an + // insertion. In this case, the entire tip result gets inserted into the + // a11y tree as a single insertion, so no alert event would be fired. + this.window.A11yUtils.announce(result.payload.textData); + } + } + + async _updateRowForDynamicType(item, result) { + item.setAttribute("dynamicType", result.payload.dynamicType); + + let idsByName = new Map(); + for (let [name, node] of item._elements) { + node.id = `${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}-${payloadName}`); + this._addTextContentWithHighlights( + nodeToHighlight, + result.payload[payloadName], + highlights + ); + } + + // Get the view update from the result's provider. + let provider = UrlbarProvidersManager.getProvider(result.providerName); + let viewUpdate = await provider.getViewUpdate(result, idsByName); + + // Update each node in the view by name. + for (let [nodeName, update] of Object.entries(viewUpdate)) { + let node = item.querySelector(`#${item.id}-${nodeName}`); + for (let [attrName, value] of Object.entries(update.attributes || {})) { + if (attrName == "id") { + // We do not allow dynamic results to set IDs for their Nodes. IDs are + // managed by the view to ensure they are unique. + Cu.reportError( + "Dynamic results are prohibited from setting their own IDs." + ); + continue; + } + node.setAttribute(attrName, value); + } + for (let [styleName, value] of Object.entries(update.style || {})) { + node.style[styleName] = value; + } + if (update.l10n) { + this.document.l10n.setAttributes( + node, + update.l10n.id, + update.l10n.args || undefined + ); + } else if (update.textContent) { + node.textContent = update.textContent; + } + } + } + + _updateIndices() { + let visibleRowsExist = false; + for (let i = 0; i < this._rows.children.length; i++) { + let item = this._rows.children[i]; + item.result.rowIndex = i; + visibleRowsExist = visibleRowsExist || this._isElementVisible(item); + } + let selectableElement = this._getFirstSelectableElement(); + let uiIndex = 0; + while (selectableElement) { + selectableElement.elementIndex = uiIndex++; + selectableElement = this._getNextSelectableElement(selectableElement); + } + if (visibleRowsExist) { + this.panel.removeAttribute("noresults"); + } else { + this.panel.setAttribute("noresults", "true"); + } + } + + _setRowVisibility(row, visible) { + row.style.display = visible ? "" : "none"; + if ( + !visible && + row.result.type != UrlbarUtils.RESULT_TYPE.TIP && + row.result.type != 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); + } + } + + /** + * 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 = element.closest(".urlbarView-row"); + 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(item, { updateInput = true, setAccessibleFocus = true } = {}) { + if (this._selectedElement) { + this._selectedElement.toggleAttribute("selected", false); + this._selectedElement.removeAttribute("aria-selected"); + } + if (item) { + item.toggleAttribute("selected", true); + item.setAttribute("aria-selected", "true"); + } + this._setAccessibleFocus(setAccessibleFocus && item); + this._selectedElement = item; + + let result = item?.closest(".urlbarView-row")?.result; + if (updateInput) { + this.input.setValueFromResult(result); + } else { + this.input.setResultForCurrentValue(result); + } + + let provider = UrlbarProvidersManager.getProvider(result?.providerName); + if (provider) { + provider.tryMethod("onSelection", result, item); + } + } + + /** + * Returns true if the given element is 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 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 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 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 = element.closest(".urlbarView-row"); + if (!row) { + return null; + } + + let next; + if ( + row.result.type == UrlbarUtils.RESULT_TYPE.TIP || + row.result.type == UrlbarUtils.RESULT_TYPE.DYNAMIC + ) { + let selectables = [...row.querySelectorAll(SELECTABLE_ELEMENT_SELECTOR)]; + let index = selectables.indexOf(element); + if (index == selectables.length - 1) { + next = row.nextElementSibling; + } else { + next = selectables[index + 1]; + } + } else { + next = row.nextElementSibling; + } + + if (next && !this._isSelectableElement(next)) { + next = this._getNextSelectableElement(next); + } + + return next; + } + + /** + * Returns the previous 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 = element.closest(".urlbarView-row"); + if (!row) { + return null; + } + + let previous; + if ( + row.result.type == UrlbarUtils.RESULT_TYPE.TIP || + row.result.type == UrlbarUtils.RESULT_TYPE.DYNAMIC + ) { + let selectables = [...row.querySelectorAll(SELECTABLE_ELEMENT_SELECTOR)]; + let index = selectables.indexOf(element); + if (index == 0 || !selectables.length) { + previous = row.previousElementSibling; + } else if (index < 0) { + previous = selectables[selectables.length - 1]; + } else { + previous = selectables[index - 1]; + } + } else { + previous = row.previousElementSibling; + } + + 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() { + if (!this.isOpen || !this._selectedElement) { + return null; + } + let selected = this._selectedElement; + + if (!selected.classList.contains("urlbarView-row")) { + // selected may be an element in a result group, like RESULT_TYPE.TIP. + selected = selected.closest(".urlbarView-row"); + } + + return selected; + } + + /** + * @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) { + if (!this.isOpen || !element) { + return null; + } + + if (!element.classList.contains("urlbarView-row")) { + element = element.closest(".urlbarView-row"); + } + + return element; + } + + _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 {Node} titleNode + * The DOM node for the result's tile. + */ + _setResultTitle(result, titleNode) { + 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.document.l10n.setAttributes( + titleNode, + "urlbar-result-action-search-w-engine", + { engine: result.payload.engine } + ); + return; + } + + titleNode.removeAttribute("data-l10n-id"); + this._addTextContentWithHighlights( + titleNode, + result.title, + result.titleHighlights + ); + } + + /** + * Adds text content to a node, placing substrings that should be highlighted + * inside <em> nodes. + * + * @param {Node} 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 {Node} 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"); + } + } + + _setElementOverflowing(element, overflowing) { + element.toggleAttribute("overflow", overflowing); + if (overflowing) { + 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 != UrlbarUtils.RESULT_TYPE.TIP) { + return false; + } + let tipButton = this._rows.firstElementChild.querySelector( + ".urlbarView-tip-button" + ); + if (!tipButton) { + throw new Error("Expected a tip button"); + } + this.input.pickElement(tipButton, event); + return true; + } + + // 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 = 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 == UrlbarUtils.RESULT_TYPE.SEARCH && + result.source == 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 == 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 = UrlbarUtils.getResultSourceName(localSearchMode.source); + this.document.l10n.setAttributes( + action, + `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.document.l10n.setAttributes( + action, + "urlbar-result-action-search-w-engine", + { 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 || UrlbarUtils.ICON.DEFAULT; + } + } else { + Cu.reportError("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 = 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 (!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); + if (!element) { + // Ignore clicks on elements that can't be selected/picked. + return; + } + this._selectElement(element, { updateInput: false }); + this.controller.speculativeConnect( + this.selectedResult, + this._queryContext, + "mousedown" + ); + } + + _on_mouseup(event) { + if (event.button == 2) { + // Ignore right clicks. + return; + } + let element = this.getClosestSelectableElement(event.target); + if (!element) { + // Ignore clicks on elements that can't be selected/picked. + return; + } + this.input.pickElement(element, event); + } + + _on_overflow(event) { + if ( + event.detail == 1 && + (event.target.classList.contains("urlbarView-url") || + event.target.classList.contains("urlbarView-title")) + ) { + this._setElementOverflowing(event.target, true); + } + } + + _on_underflow(event) { + if ( + event.detail == 1 && + (event.target.classList.contains("urlbarView-url") || + event.target.classList.contains("urlbarView-title")) + ) { + this._setElementOverflowing(event.target, false); + } + } + + _on_resize() { + this._enableOrDisableRowWrap(); + } +} + +UrlbarView.removeStaleRowsTimeout = DEFAULT_REMOVE_STALE_ROWS_TIMEOUT; + +/** + * 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 { + /** + * Constructor. + * @param {number} size The number of entries to keep in the cache. + */ + constructor(size) { + this.size = size; + this._cache = []; + } + + /** + * Adds a new entry to the cache. + * @param {UrlbarQueryContext} queryContext The UrlbarQueryContext to add. + * @note QueryContexts without a searchString or without results are ignored + * and not added. + */ + put(queryContext) { + let searchString = queryContext.searchString; + if (!searchString || !queryContext.results.length) { + 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 styleSheetService.preloadSheetAsync( + uri, + Ci.nsIStyleSheetService.AGENT_SHEET + ); + window.windowUtils.addSheet(sheet, Ci.nsIDOMWindowUtils.AGENT_SHEET); + } catch (ex) { + Cu.reportError(`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) { + Cu.reportError(`Error removing dynamic stylesheet: ${ex}`); + } +} |