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Diffstat (limited to '')
| -rw-r--r-- | js/ui/searchController.js | 325 |
1 files changed, 325 insertions, 0 deletions
diff --git a/js/ui/searchController.js b/js/ui/searchController.js new file mode 100644 index 0000000..ba743a9 --- /dev/null +++ b/js/ui/searchController.js @@ -0,0 +1,325 @@ +// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*- +/* exported SearchController */ + +const { Clutter, GObject, St } = imports.gi; + +const Main = imports.ui.main; +const Search = imports.ui.search; +const ShellEntry = imports.ui.shellEntry; + +var FocusTrap = GObject.registerClass( +class FocusTrap extends St.Widget { + vfunc_navigate_focus(from, direction) { + if (direction === St.DirectionType.TAB_FORWARD || + direction === St.DirectionType.TAB_BACKWARD) + return super.vfunc_navigate_focus(from, direction); + return false; + } +}); + +function getTermsForSearchString(searchString) { + searchString = searchString.replace(/^\s+/g, '').replace(/\s+$/g, ''); + if (searchString === '') + return []; + return searchString.split(/\s+/); +} + +var SearchController = GObject.registerClass({ + Properties: { + 'search-active': GObject.ParamSpec.boolean( + 'search-active', 'search-active', 'search-active', + GObject.ParamFlags.READABLE, + false), + }, +}, class SearchController extends St.Widget { + _init(searchEntry, showAppsButton) { + super._init({ + name: 'searchController', + layout_manager: new Clutter.BinLayout(), + x_expand: true, + y_expand: true, + visible: false, + }); + + this._showAppsButton = showAppsButton; + this._showAppsButton.connect('notify::checked', this._onShowAppsButtonToggled.bind(this)); + + this._activePage = null; + + this._searchActive = false; + + this._entry = searchEntry; + ShellEntry.addContextMenu(this._entry); + + this._text = this._entry.clutter_text; + this._text.connect('text-changed', this._onTextChanged.bind(this)); + this._text.connect('key-press-event', this._onKeyPress.bind(this)); + this._text.connect('key-focus-in', () => { + this._searchResults.highlightDefault(true); + }); + this._text.connect('key-focus-out', () => { + this._searchResults.highlightDefault(false); + }); + this._entry.connect('popup-menu', () => { + if (!this._searchActive) + return; + + this._entry.menu.close(); + this._searchResults.popupMenuDefault(); + }); + this._entry.connect('notify::mapped', this._onMapped.bind(this)); + global.stage.connect('notify::key-focus', this._onStageKeyFocusChanged.bind(this)); + + this._entry.set_primary_icon(new St.Icon({ + style_class: 'search-entry-icon', + icon_name: 'edit-find-symbolic', + })); + this._clearIcon = new St.Icon({ + style_class: 'search-entry-icon', + icon_name: 'edit-clear-symbolic', + }); + + this._iconClickedId = 0; + this._capturedEventId = 0; + + this._searchResults = new Search.SearchResultsView(); + this.add_child(this._searchResults); + Main.ctrlAltTabManager.addGroup(this._entry, _('Search'), 'edit-find-symbolic'); + + // Since the entry isn't inside the results container we install this + // dummy widget as the last results container child so that we can + // include the entry in the keynav tab path + this._focusTrap = new FocusTrap({ can_focus: true }); + this._focusTrap.connect('key-focus-in', () => { + this._entry.grab_key_focus(); + }); + this._searchResults.add_actor(this._focusTrap); + + global.focus_manager.add_group(this._searchResults); + + this._stageKeyPressId = 0; + Main.overview.connect('showing', () => { + this._stageKeyPressId = + global.stage.connect('key-press-event', this._onStageKeyPress.bind(this)); + }); + Main.overview.connect('hiding', () => { + if (this._stageKeyPressId !== 0) { + global.stage.disconnect(this._stageKeyPressId); + this._stageKeyPressId = 0; + } + }); + } + + prepareToEnterOverview() { + this.reset(); + this._setSearchActive(false); + } + + vfunc_unmap() { + this.reset(); + + super.vfunc_unmap(); + } + + _setSearchActive(searchActive) { + if (this._searchActive === searchActive) + return; + + this._searchActive = searchActive; + this.notify('search-active'); + } + + _onShowAppsButtonToggled() { + this._setSearchActive(false); + } + + _onStageKeyPress(actor, event) { + // Ignore events while anything but the overview has + // pushed a modal (system modals, looking glass, ...) + if (Main.modalCount > 1) + return Clutter.EVENT_PROPAGATE; + + let symbol = event.get_key_symbol(); + + if (symbol === Clutter.KEY_Escape) { + if (this._searchActive) + this.reset(); + else if (this._showAppsButton.checked) + this._showAppsButton.checked = false; + else + Main.overview.hide(); + return Clutter.EVENT_STOP; + } else if (this._shouldTriggerSearch(symbol)) { + this.startSearch(event); + } + return Clutter.EVENT_PROPAGATE; + } + + _searchCancelled() { + this._setSearchActive(false); + + // Leave the entry focused when it doesn't have any text; + // when replacing a selected search term, Clutter emits + // two 'text-changed' signals, one for deleting the previous + // text and one for the new one - the second one is handled + // incorrectly when we remove focus + // (https://bugzilla.gnome.org/show_bug.cgi?id=636341) */ + if (this._text.text !== '') + this.reset(); + } + + reset() { + // Don't drop the key focus on Clutter's side if anything but the + // overview has pushed a modal (e.g. system modals when activated using + // the overview). + if (Main.modalCount <= 1) + global.stage.set_key_focus(null); + + this._entry.text = ''; + + this._text.set_cursor_visible(true); + this._text.set_selection(0, 0); + } + + _onStageKeyFocusChanged() { + let focus = global.stage.get_key_focus(); + let appearFocused = this._entry.contains(focus) || + this._searchResults.contains(focus); + + this._text.set_cursor_visible(appearFocused); + + if (appearFocused) + this._entry.add_style_pseudo_class('focus'); + else + this._entry.remove_style_pseudo_class('focus'); + } + + _onMapped() { + if (this._entry.mapped) { + // Enable 'find-as-you-type' + this._capturedEventId = + global.stage.connect('captured-event', this._onCapturedEvent.bind(this)); + this._text.set_cursor_visible(true); + this._text.set_selection(0, 0); + } else { + // Disable 'find-as-you-type' + if (this._capturedEventId > 0) + global.stage.disconnect(this._capturedEventId); + this._capturedEventId = 0; + } + } + + _shouldTriggerSearch(symbol) { + if (symbol === Clutter.KEY_Multi_key) + return true; + + if (symbol === Clutter.KEY_BackSpace && this._searchActive) + return true; + + let unicode = Clutter.keysym_to_unicode(symbol); + if (unicode === 0) + return false; + + if (getTermsForSearchString(String.fromCharCode(unicode)).length > 0) + return true; + + return false; + } + + startSearch(event) { + global.stage.set_key_focus(this._text); + this._text.event(event, false); + } + + // the entry does not show the hint + _isActivated() { + return this._text.text === this._entry.get_text(); + } + + _onTextChanged() { + let terms = getTermsForSearchString(this._entry.get_text()); + + const searchActive = terms.length > 0; + this._searchResults.setTerms(terms); + + if (searchActive) { + this._setSearchActive(true); + + this._entry.set_secondary_icon(this._clearIcon); + + if (this._iconClickedId === 0) { + this._iconClickedId = + this._entry.connect('secondary-icon-clicked', this.reset.bind(this)); + } + } else { + if (this._iconClickedId > 0) { + this._entry.disconnect(this._iconClickedId); + this._iconClickedId = 0; + } + + this._entry.set_secondary_icon(null); + this._searchCancelled(); + } + } + + _onKeyPress(entry, event) { + let symbol = event.get_key_symbol(); + if (symbol === Clutter.KEY_Escape) { + if (this._isActivated()) { + this.reset(); + return Clutter.EVENT_STOP; + } + } else if (this._searchActive) { + let arrowNext, nextDirection; + if (entry.get_text_direction() === Clutter.TextDirection.RTL) { + arrowNext = Clutter.KEY_Left; + nextDirection = St.DirectionType.LEFT; + } else { + arrowNext = Clutter.KEY_Right; + nextDirection = St.DirectionType.RIGHT; + } + + if (symbol === Clutter.KEY_Tab) { + this._searchResults.navigateFocus(St.DirectionType.TAB_FORWARD); + return Clutter.EVENT_STOP; + } else if (symbol === Clutter.KEY_ISO_Left_Tab) { + this._focusTrap.can_focus = false; + this._searchResults.navigateFocus(St.DirectionType.TAB_BACKWARD); + this._focusTrap.can_focus = true; + return Clutter.EVENT_STOP; + } else if (symbol === Clutter.KEY_Down) { + this._searchResults.navigateFocus(St.DirectionType.DOWN); + return Clutter.EVENT_STOP; + } else if (symbol === arrowNext && this._text.position === -1) { + this._searchResults.navigateFocus(nextDirection); + return Clutter.EVENT_STOP; + } else if (symbol === Clutter.KEY_Return || symbol === Clutter.KEY_KP_Enter) { + this._searchResults.activateDefault(); + return Clutter.EVENT_STOP; + } + } + return Clutter.EVENT_PROPAGATE; + } + + _onCapturedEvent(actor, event) { + if (event.type() === Clutter.EventType.BUTTON_PRESS) { + const targetActor = global.stage.get_event_actor(event); + if (targetActor !== this._text && + this._text.has_key_focus() && + this._text.text === '' && + !this._text.has_preedit() && + !Main.layoutManager.keyboardBox.contains(targetActor)) { + // the user clicked outside after activating the entry, but + // with no search term entered and no keyboard button pressed + // - cancel the search + this.reset(); + } + } + + return Clutter.EVENT_PROPAGATE; + } + + get searchActive() { + return this._searchActive; + } +}); |