32ef951fe0
This is probably not the biggest optimization that needs to be made at least for application searching, but we can optimize the case where we're going from a search of "fi" to "fire" by just re-searching the list of things we already had that matched "fi" instead of looping over everything. https://bugzilla.gnome.org/show_bug.cgi?id=596119
814 lines
32 KiB
JavaScript
814 lines
32 KiB
JavaScript
/* -*- mode: js2; js2-basic-offset: 4; indent-tabs-mode: nil -*- */
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const Big = imports.gi.Big;
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const Clutter = imports.gi.Clutter;
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const Gio = imports.gi.Gio;
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const Gdk = imports.gi.Gdk;
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const Gtk = imports.gi.Gtk;
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const Lang = imports.lang;
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const Mainloop = imports.mainloop;
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const Meta = imports.gi.Meta;
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const Pango = imports.gi.Pango;
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const Signals = imports.signals;
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const Shell = imports.gi.Shell;
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const Button = imports.ui.button;
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const DND = imports.ui.dnd;
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const Link = imports.ui.link;
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const Main = imports.ui.main;
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const RedisplayFlags = { NONE: 0,
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RESET_CONTROLS: 1 << 0,
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SUBSEARCH: 1 << 1 };
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const ITEM_DISPLAY_NAME_COLOR = new Clutter.Color();
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ITEM_DISPLAY_NAME_COLOR.from_pixel(0xffffffff);
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const ITEM_DISPLAY_DESCRIPTION_COLOR = new Clutter.Color();
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ITEM_DISPLAY_DESCRIPTION_COLOR.from_pixel(0xffffffbb);
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const ITEM_DISPLAY_BACKGROUND_COLOR = new Clutter.Color();
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ITEM_DISPLAY_BACKGROUND_COLOR.from_pixel(0x00000000);
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const ITEM_DISPLAY_SELECTED_BACKGROUND_COLOR = new Clutter.Color();
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ITEM_DISPLAY_SELECTED_BACKGROUND_COLOR.from_pixel(0x4f6fadaa);
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const DISPLAY_CONTROL_SELECTED_COLOR = new Clutter.Color();
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DISPLAY_CONTROL_SELECTED_COLOR.from_pixel(0x112288ff);
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const PREVIEW_BOX_BACKGROUND_COLOR = new Clutter.Color();
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PREVIEW_BOX_BACKGROUND_COLOR.from_pixel(0xADADADf0);
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const DEFAULT_PADDING = 4;
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const ITEM_DISPLAY_HEIGHT = 50;
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const ITEM_DISPLAY_ICON_SIZE = 48;
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const ITEM_DISPLAY_PADDING = 1;
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const ITEM_DISPLAY_PADDING_RIGHT = 2;
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const DEFAULT_COLUMN_GAP = 6;
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const PREVIEW_ICON_SIZE = 96;
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const PREVIEW_BOX_PADDING = 6;
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const PREVIEW_BOX_SPACING = DEFAULT_PADDING;
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const PREVIEW_BOX_CORNER_RADIUS = 10;
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// how far relative to the full item width the preview box should be placed
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const PREVIEW_PLACING = 3/4;
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const PREVIEW_DETAILS_MIN_WIDTH = PREVIEW_ICON_SIZE * 2;
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const INFORMATION_BUTTON_SIZE = 16;
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/* This is a virtual class that represents a single display item containing
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* a name, a description, and an icon. It allows selecting an item and represents
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* it by highlighting it with a different background color than the default.
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*/
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function GenericDisplayItem() {
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this._init();
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}
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GenericDisplayItem.prototype = {
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_init: function() {
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this.actor = new Big.Box({ orientation: Big.BoxOrientation.HORIZONTAL,
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spacing: ITEM_DISPLAY_PADDING,
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reactive: true,
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background_color: ITEM_DISPLAY_BACKGROUND_COLOR,
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corner_radius: 4,
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height: ITEM_DISPLAY_HEIGHT });
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this.actor._delegate = this;
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this.actor.connect('button-release-event',
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Lang.bind(this,
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function() {
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// Activates the item by launching it
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this.emit('activate');
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return true;
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}));
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let draggable = DND.makeDraggable(this.actor);
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draggable.connect('drag-begin', Lang.bind(this, this._onDragBegin));
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this._infoContent = new Big.Box({ orientation: Big.BoxOrientation.HORIZONTAL,
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spacing: DEFAULT_PADDING });
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this.actor.append(this._infoContent, Big.BoxPackFlags.EXPAND);
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this._iconBox = new Big.Box();
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this._infoContent.append(this._iconBox, Big.BoxPackFlags.NONE);
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this._infoText = new Big.Box({ orientation: Big.BoxOrientation.VERTICAL,
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spacing: DEFAULT_PADDING });
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this._infoContent.append(this._infoText, Big.BoxPackFlags.EXPAND);
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let infoIconUri = "file://" + global.imagedir + "info.svg";
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let infoIcon = Shell.TextureCache.get_default().load_uri_sync(Shell.TextureCachePolicy.FOREVER,
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infoIconUri,
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INFORMATION_BUTTON_SIZE,
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INFORMATION_BUTTON_SIZE);
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this._informationButton = new Button.iconButton(this.actor, INFORMATION_BUTTON_SIZE, infoIcon);
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let buttonBox = new Big.Box({ width: INFORMATION_BUTTON_SIZE + 2 * DEFAULT_PADDING,
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height: INFORMATION_BUTTON_SIZE,
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padding_left: DEFAULT_PADDING, padding_right: DEFAULT_PADDING,
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y_align: Big.BoxAlignment.CENTER });
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buttonBox.append(this._informationButton.actor, Big.BoxPackFlags.NONE);
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this.actor.append(buttonBox, Big.BoxPackFlags.END);
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// Connecting to the button-press-event for the information button ensures that the actor,
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// which is a draggable actor, does not get the button-press-event and doesn't initiate
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// the dragging, which then prevents us from getting the button-release-event for the button.
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this._informationButton.actor.connect('button-press-event',
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Lang.bind(this,
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function() {
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return true;
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}));
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this._informationButton.actor.connect('button-release-event',
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Lang.bind(this,
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function() {
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// Selects the item by highlighting it and displaying its details
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this.emit('show-details');
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return true;
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}));
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this._name = null;
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this._description = null;
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this._icon = null;
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// An array of details description actors that we create over time for the item.
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// It is used for updating the description text inside the details actor when
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// the description text for the item is updated.
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this._detailsDescriptions = [];
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},
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//// Draggable object interface ////
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// Returns a cloned texture of the item's icon to represent the item as it
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// is being dragged.
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getDragActor: function(stageX, stageY) {
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return this._createIcon();
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},
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// Returns the item icon, a separate copy of which is used to
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// represent the item as it is being dragged. This is used to
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// determine a snap-back location for the drag icon if it does
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// not get accepted by any drop target.
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getDragActorSource: function() {
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return this._icon;
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},
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//// Public methods ////
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// Shows the information button when the item was drawn under the mouse pointer.
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onDrawnUnderPointer: function() {
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this._informationButton.show();
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},
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// Highlights the item by setting a different background color than the default
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// if isSelected is true, removes the highlighting otherwise.
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markSelected: function(isSelected) {
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let color;
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if (isSelected) {
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color = ITEM_DISPLAY_SELECTED_BACKGROUND_COLOR;
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this._informationButton.forceShow(true);
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}
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else {
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color = ITEM_DISPLAY_BACKGROUND_COLOR;
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this._informationButton.forceShow(false);
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}
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this.actor.background_color = color;
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},
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/*
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* Returns an actor containing item details. In the future details can have more information than what
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* the preview pop-up has and be item-type specific.
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*/
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createDetailsActor: function() {
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let details = new Big.Box({ orientation: Big.BoxOrientation.VERTICAL,
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spacing: PREVIEW_BOX_SPACING });
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let mainDetails = new Big.Box({ orientation: Big.BoxOrientation.HORIZONTAL,
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spacing: PREVIEW_BOX_SPACING });
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// Inner box with name and description
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let textDetails = new Big.Box({ orientation: Big.BoxOrientation.VERTICAL,
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spacing: PREVIEW_BOX_SPACING });
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let detailsName = new Clutter.Text({ color: ITEM_DISPLAY_NAME_COLOR,
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font_name: "Sans bold 14px",
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line_wrap: true,
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text: this._name.text });
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textDetails.append(detailsName, Big.BoxPackFlags.NONE);
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let detailsDescription = new Clutter.Text({ color: ITEM_DISPLAY_NAME_COLOR,
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font_name: "Sans 14px",
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line_wrap: true,
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text: this._description.text });
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textDetails.append(detailsDescription, Big.BoxPackFlags.NONE);
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this._detailsDescriptions.push(detailsDescription);
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mainDetails.append(textDetails, Big.BoxPackFlags.EXPAND);
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let previewIcon = this._createPreviewIcon();
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let largePreviewIcon = this._createLargePreviewIcon();
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if (previewIcon != null && largePreviewIcon == null) {
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mainDetails.prepend(previewIcon, Big.BoxPackFlags.NONE);
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}
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details.append(mainDetails, Big.BoxPackFlags.NONE);
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if (largePreviewIcon != null) {
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let largePreview = new Big.Box({ orientation: Big.BoxOrientation.HORIZONTAL });
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largePreview.append(largePreviewIcon, Big.BoxPackFlags.NONE);
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details.append(largePreview, Big.BoxPackFlags.NONE);
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}
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return details;
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},
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// Destroys the item.
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destroy: function() {
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this.actor.destroy();
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},
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//// Pure virtual public methods ////
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// Performes an action associated with launching this item, such as opening a file or an application.
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launch: function() {
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throw new Error("Not implemented");
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},
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//// Protected methods ////
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/*
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* Creates the graphical elements for the item based on the item information.
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*
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* nameText - name of the item
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* descriptionText - short description of the item
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*/
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_setItemInfo: function(nameText, descriptionText) {
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if (this._name != null) {
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// this also removes this._name from the parent container,
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// so we don't need to call this.actor.remove_actor(this._name) directly
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this._name.destroy();
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this._name = null;
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}
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if (this._description != null) {
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this._description.destroy();
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this._description = null;
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}
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if (this._icon != null) {
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// though we get the icon from elsewhere, we assume its ownership here,
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// and therefore should be responsible for distroying it
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this._icon.destroy();
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this._icon = null;
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}
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this._icon = this._createIcon();
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this._iconBox.append(this._icon, Big.BoxPackFlags.NONE);
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this._name = new Clutter.Text({ color: ITEM_DISPLAY_NAME_COLOR,
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font_name: "Sans 14px",
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ellipsize: Pango.EllipsizeMode.END,
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text: nameText });
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this._infoText.append(this._name, Big.BoxPackFlags.EXPAND);
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this._description = new Clutter.Text({ color: ITEM_DISPLAY_DESCRIPTION_COLOR,
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font_name: "Sans 12px",
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ellipsize: Pango.EllipsizeMode.END,
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text: descriptionText ? descriptionText : ""
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});
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this._infoText.append(this._description, Big.BoxPackFlags.EXPAND);
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},
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// Sets the description text for the item, including the description text
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// in the details actors that have been created for the item.
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_setDescriptionText: function(text) {
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this._description.text = text;
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for (let i = 0; i < this._detailsDescriptions.length; i++) {
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let detailsDescription = this._detailsDescriptions[i];
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if (detailsDescription != null) {
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detailsDescription.text = text;
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}
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}
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},
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//// Virtual protected methods ////
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// Creates and returns a large preview icon, but only if we have a detailed image.
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_createLargePreviewIcon : function() {
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return null;
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},
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//// Pure virtual protected methods ////
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// Returns an icon for the item.
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_createIcon: function() {
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throw new Error("Not implemented");
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},
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// Returns a preview icon for the item.
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_createPreviewIcon: function() {
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throw new Error("Not implemented");
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},
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//// Private methods ////
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// Hides the information button once the item starts being dragged.
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_onDragBegin : function (draggable, time) {
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// For some reason, we are not getting leave-event signal when we are dragging an item,
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// so we should remove the link manually.
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this._informationButton.actor.hide();
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}
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};
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Signals.addSignalMethods(GenericDisplayItem.prototype);
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/* This is a virtual class that represents a display containing a collection of items
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* that can be filtered with a search string.
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*/
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function GenericDisplay() {
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this._init();
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}
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GenericDisplay.prototype = {
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_init : function() {
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this._search = '';
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this._expanded = false;
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this._maxItemsPerPage = null;
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this._list = new Shell.OverflowList({ spacing: 6.0,
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item_height: ITEM_DISPLAY_HEIGHT });
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this._list.connect('notify::n-pages', Lang.bind(this, function () {
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this._updateDisplayControl(true);
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}));
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this._list.connect('notify::page', Lang.bind(this, function () {
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this._updateDisplayControl(false);
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}));
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// map<itemId, Object> where Object represents the item info
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this._allItems = {};
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// an array of itemIds of items that match the current request
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// in the order in which the items should be displayed
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this._matchedItems = [];
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// map<itemId, GenericDisplayItem>
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this._displayedItems = {};
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this._openDetailIndex = -1;
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this._selectedIndex = -1;
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// These two are public - .actor is the normal "actor subclass" property,
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// but we also expose a .displayControl actor which is separate.
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// See also getNavigationArea.
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this.actor = this._list;
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this.displayControl = new Big.Box({ background_color: ITEM_DISPLAY_BACKGROUND_COLOR,
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spacing: 12,
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orientation: Big.BoxOrientation.HORIZONTAL});
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},
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//// Public methods ////
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// Sets the search string and displays the matching items.
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setSearch: function(text) {
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let lowertext = text.toLowerCase();
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let flags = RedisplayFlags.RESET_CONTROLS;
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if (this._search != '') {
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if (lowertext.indexOf(this._search) == 0)
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flags |= RedisplayFlags.SUBSEARCH;
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}
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this._search = lowertext;
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this._redisplay(flags);
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},
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// Launches the item that is currently selected, closing the Overview
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activateSelected: function() {
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if (this._selectedIndex != -1) {
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let selected = this._findDisplayedByIndex(this._selectedIndex);
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selected.launch();
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this.unsetSelected();
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Main.overview.hide();
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}
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},
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// Moves the selection one up. If the selection was already on the top item, it's moved
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// to the bottom one. Returns true if the selection actually moved up, false if it wrapped
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// around to the bottom.
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selectUp: function() {
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let count = this._list.displayedCount;
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let selectedUp = true;
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let prev = this._selectedIndex - 1;
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if (this._selectedIndex <= 0) {
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prev = count - 1;
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selectedUp = false;
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}
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this._selectIndex(prev);
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return selectedUp;
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},
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// Moves the selection one down. If the selection was already on the bottom item, it's moved
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// to the top one. Returns true if the selection actually moved down, false if it wrapped
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// around to the top.
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selectDown: function() {
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let count = this._list.displayedCount;
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let selectedDown = true;
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let next = this._selectedIndex + 1;
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if (this._selectedIndex == count - 1) {
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next = 0;
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selectedDown = false;
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}
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this._selectIndex(next);
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return selectedDown;
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},
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// Selects the first item among the displayed items.
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selectFirstItem: function() {
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if (this.hasItems())
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this._selectIndex(0);
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},
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// Selects the last item among the displayed items.
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selectLastItem: function() {
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let count = this._list.displayedCount;
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if (this.hasItems())
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this._selectIndex(count - 1);
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},
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// Returns true if the display has some item selected.
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hasSelected: function() {
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return this._selectedIndex != -1;
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},
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// Removes selection if some display item is selected.
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unsetSelected: function() {
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this._selectIndex(-1);
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},
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// Returns true if the display has any displayed items.
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hasItems: function() {
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// TODO: figure out why this._list.displayedCount is returning a
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// positive number when this._mathedItems.length is 0
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// This can be triggered if a search string is entered for which there are no matches.
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// log("this._mathedItems.length: " + this._matchedItems.length + " this._list.displayedCount " + this._list.displayedCount);
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return this._matchedItems.length > 0;
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},
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getMatchedItemsCount: function() {
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return this._matchedItems.length;
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},
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// Load the initial state
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load: function() {
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this._redisplay(RedisplayFlags.RESET_CONTROLS);
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},
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// Should be called when the display is closed
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resetState: function() {
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this._filterReset();
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this._openDetailIndex = -1;
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},
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// Returns an actor which acts as a sidebar; this is used for
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// the applications category view
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getNavigationArea: function () {
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return null;
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},
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createDetailsForIndex: function(index) {
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let item = this._findDisplayedByIndex(index);
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return item.createDetailsActor();
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},
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// Displays the page specified by the pageNumber argument.
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displayPage: function(pageNumber) {
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// Cleanup from the previous selection, but don't unset this._selectedIndex
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if (this.hasSelected()) {
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this._findDisplayedByIndex(this._selectedIndex).markSelected(false);
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}
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this._list.page = pageNumber;
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},
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//// Protected methods ////
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/*
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* Displays items that match the current request and should show up on the current page.
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* Updates the display control to reflect the matched items set and the page selected.
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*
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* resetDisplayControl - indicates if the display control should be re-created because
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* the results or the space allocated for them changed. If it's false,
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* the existing display control is used and only the page links are
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* updated to reflect the current page selection.
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*/
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_displayMatchedItems: function(resetDisplayControl) {
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// When generating a new list to display, we first remove all the old
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// displayed items which will unset the selection. So we need
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// to keep a flag which indicates if this display had the selection.
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let hadSelected = this.hasSelected();
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this._removeAllDisplayItems();
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for (let i = 0; i < this._matchedItems.length; i++) {
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this._addDisplayItem(this._matchedItems[i]);
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}
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if (hadSelected) {
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this._selectedIndex = -1;
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this.selectFirstItem();
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}
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// Check if the pointer is over one of the items and display the information button if it is.
|
|
// We want to do this between finishing our changes to the display and the point where
|
|
// the display is redrawn.
|
|
Mainloop.idle_add(Lang.bind(this,
|
|
function() {
|
|
let [child, x, y, mask] = Gdk.Screen.get_default().get_root_window().get_pointer();
|
|
let actor = global.stage.get_actor_at_pos(Clutter.PickMode.REACTIVE,
|
|
x, y);
|
|
if (actor != null) {
|
|
let item = this._findDisplayedByActor(actor);
|
|
if (item != null) {
|
|
item.onDrawnUnderPointer();
|
|
}
|
|
}
|
|
return false;
|
|
}),
|
|
Meta.PRIORITY_BEFORE_REDRAW);
|
|
},
|
|
|
|
// Creates a display item based on the information associated with itemId
|
|
// and adds it to the displayed items.
|
|
_addDisplayItem : function(itemId) {
|
|
if (this._displayedItems.hasOwnProperty(itemId)) {
|
|
log("Tried adding a display item for " + itemId + ", but an item with this item id is already among displayed items.");
|
|
return;
|
|
}
|
|
|
|
let itemInfo = this._allItems[itemId];
|
|
let displayItem = this._createDisplayItem(itemInfo);
|
|
|
|
displayItem.connect('activate',
|
|
Lang.bind(this,
|
|
function() {
|
|
// update the selection
|
|
this._selectIndex(this._list.get_actor_index(displayItem.actor));
|
|
this.activateSelected();
|
|
}));
|
|
|
|
displayItem.connect('show-details',
|
|
Lang.bind(this,
|
|
function() {
|
|
let index = this._list.get_actor_index(displayItem.actor);
|
|
/* Close the details pane if already open */
|
|
if (index == this._openDetailIndex) {
|
|
this._openDetailIndex = -1;
|
|
this.emit('show-details', -1);
|
|
} else {
|
|
this._openDetailIndex = index;
|
|
this.emit('show-details', index);
|
|
}
|
|
}));
|
|
this._list.add_actor(displayItem.actor);
|
|
this._displayedItems[itemId] = displayItem;
|
|
},
|
|
|
|
// Removes an item identifed by the itemId from the displayed items.
|
|
_removeDisplayItem: function(itemId) {
|
|
let count = this._list.displayedCount;
|
|
let displayItem = this._displayedItems[itemId];
|
|
let displayItemIndex = this._list.get_actor_index(displayItem.actor);
|
|
|
|
if (this.hasSelected() && count == 1) {
|
|
this.unsetSelected();
|
|
} else if (this.hasSelected() && displayItemIndex < this._selectedIndex) {
|
|
this.selectUp();
|
|
}
|
|
|
|
displayItem.destroy();
|
|
|
|
delete this._displayedItems[itemId];
|
|
},
|
|
|
|
// Removes all displayed items.
|
|
_removeAllDisplayItems: function() {
|
|
this.unsetSelected();
|
|
for (itemId in this._displayedItems)
|
|
this._removeDisplayItem(itemId);
|
|
},
|
|
|
|
// Return true if there's an active search or other constraint
|
|
// on the list
|
|
_filterActive: function() {
|
|
return this._search != "";
|
|
},
|
|
|
|
// Called when we are resetting state
|
|
_filterReset: function() {
|
|
this.unsetSelected();
|
|
},
|
|
|
|
/*
|
|
* Updates the displayed items, applying the search string if one exists.
|
|
* @flags: Flags controlling redisplay behavior as follows:
|
|
* RESET_CONTROLS - indicates if the page selection should be reset when displaying the matching results.
|
|
* We reset the page selection when the change in results was initiated by the user by
|
|
* entering a different search criteria or by viewing the results list in a different
|
|
* size mode, but we keep the page selection the same if the results got updated on
|
|
* their own while the user was browsing through the result pages.
|
|
* SUBSEARCH - Indicates that the current _search is a superstring of the previous
|
|
* one, which implies we only need to re-search through previous results.
|
|
*/
|
|
_redisplay: function(flags) {
|
|
let resetPage = flags & RedisplayFlags.RESET_CONTROLS;
|
|
let isSubSearch = flags & RedisplayFlags.SUBSEARCH;
|
|
this._refreshCache();
|
|
if (!this._filterActive())
|
|
this._setDefaultList();
|
|
else
|
|
this._doSearchFilter(isSubSearch);
|
|
|
|
if (resetPage)
|
|
this._list.page = 0;
|
|
|
|
this._displayMatchedItems(true);
|
|
|
|
this.emit('redisplayed');
|
|
},
|
|
|
|
//// Pure virtual protected methods ////
|
|
|
|
// Performs the steps needed to have the latest information about the items.
|
|
_refreshCache: function() {
|
|
throw new Error("Not implemented");
|
|
},
|
|
|
|
// Sets the list of the displayed items based on the default sorting order.
|
|
// The default sorting order is specific to each implementing class.
|
|
_setDefaultList: function() {
|
|
throw new Error("Not implemented");
|
|
},
|
|
|
|
// Compares items associated with the item ids based on the order in which the
|
|
// items should be displayed.
|
|
// Intended to be used as a compareFunction for array.sort().
|
|
// Returns an integer value indicating the result of the comparison.
|
|
_compareItems: function(itemIdA, itemIdB) {
|
|
throw new Error("Not implemented");
|
|
},
|
|
|
|
// Checks if the item info can be a match for the search string.
|
|
// Returns a boolean flag indicating if that's the case.
|
|
_isInfoMatching: function(itemInfo, search) {
|
|
throw new Error("Not implemented");
|
|
},
|
|
|
|
// Creates a display item based on itemInfo.
|
|
_createDisplayItem: function(itemInfo) {
|
|
throw new Error("Not implemented");
|
|
},
|
|
|
|
//// Private methods ////
|
|
|
|
_getItemSearchScore: function(itemId, terms) {
|
|
let item = this._allItems[itemId];
|
|
let score = 0;
|
|
for (let i = 0; i < terms.length; i++) {
|
|
let term = terms[i];
|
|
if (this._isInfoMatching(item, term)) {
|
|
score++;
|
|
}
|
|
}
|
|
return score;
|
|
},
|
|
|
|
_getSearchMatchedItems: function(isSubSearch) {
|
|
// Break the search up into terms, and search for each
|
|
// individual term. Keep track of the number of terms
|
|
// each item matched.
|
|
let terms = this._search.split(/\s+/);
|
|
let matchScores = {};
|
|
|
|
if (isSubSearch) {
|
|
for (let i = 0; i < this._matchedItems.length; i++) {
|
|
let itemId = this._matchedItems[i];
|
|
let score = this._getItemSearchScore(itemId, terms);
|
|
if (score > 0)
|
|
matchScores[itemId] = score;
|
|
}
|
|
} else {
|
|
for (let itemId in this._allItems) {
|
|
let score = this._getItemSearchScore(itemId, terms);
|
|
if (score > 0)
|
|
matchScores[itemId] = score;
|
|
}
|
|
}
|
|
return matchScores;
|
|
},
|
|
|
|
// Applies the search string to the list of items to find matches,
|
|
// and displays the matching items.
|
|
_doSearchFilter: function(isSubSearch) {
|
|
let matchedItemsForSearch;
|
|
|
|
if (this._filterActive()) {
|
|
matchedItemsForSearch = this._getSearchMatchedItems(isSubSearch);
|
|
} else {
|
|
matchedItemsForSearch = {};
|
|
for (let itemId in this._allItems) {
|
|
matchedItemsForSearch[itemId] = 1;
|
|
}
|
|
}
|
|
|
|
this._matchedItems = [];
|
|
for (itemId in matchedItemsForSearch) {
|
|
this._matchedItems.push(itemId);
|
|
}
|
|
this._matchedItems.sort(Lang.bind(this, function (a, b) {
|
|
let countA = matchedItemsForSearch[a];
|
|
let countB = matchedItemsForSearch[b];
|
|
if (countA > countB)
|
|
return -1;
|
|
else if (countA < countB)
|
|
return 1;
|
|
else
|
|
return this._compareItems(a, b);
|
|
}));
|
|
},
|
|
|
|
/*
|
|
* Updates the display control to reflect the matched items set and the page selected.
|
|
*
|
|
* resetDisplayControl - indicates if the display control should be re-created because
|
|
* the results or the space allocated for them changed. If it's false,
|
|
* the existing display control is used and only the page links are
|
|
* updated to reflect the current page selection.
|
|
*/
|
|
_updateDisplayControl: function(resetDisplayControl) {
|
|
if (resetDisplayControl) {
|
|
this.displayControl.remove_all();
|
|
let nPages = this._list.n_pages;
|
|
// Don't show the page indicator if there is only one page.
|
|
if (nPages == 1)
|
|
return;
|
|
let pageNumber = this._list.page;
|
|
for (let i = 0; i < nPages; i++) {
|
|
let pageControl = new Link.Link({ color: (i == pageNumber) ? DISPLAY_CONTROL_SELECTED_COLOR : ITEM_DISPLAY_DESCRIPTION_COLOR,
|
|
font_name: "Sans Bold 16px",
|
|
text: (i+1) + "",
|
|
reactive: (i == pageNumber) ? false : true});
|
|
this.displayControl.append(pageControl.actor, Big.BoxPackFlags.NONE);
|
|
|
|
// we use pageNumberLocalScope to get the page number right in the callback function
|
|
let pageNumberLocalScope = i;
|
|
pageControl.connect('clicked',
|
|
Lang.bind(this,
|
|
function(o, event) {
|
|
this.displayPage(pageNumberLocalScope);
|
|
}));
|
|
}
|
|
} else {
|
|
let pageControlActors = this.displayControl.get_children();
|
|
for (let i = 0; i < pageControlActors.length; i++) {
|
|
let pageControlActor = pageControlActors[i];
|
|
if (i == this._list.page) {
|
|
pageControlActor.color = DISPLAY_CONTROL_SELECTED_COLOR;
|
|
pageControlActor.reactive = false;
|
|
} else {
|
|
pageControlActor.color = ITEM_DISPLAY_DESCRIPTION_COLOR;
|
|
pageControlActor.reactive = true;
|
|
}
|
|
}
|
|
}
|
|
if (this.hasSelected()) {
|
|
this.selectFirstItem();
|
|
}
|
|
},
|
|
|
|
// Returns a display item based on its index in the ordering of the
|
|
// display children.
|
|
_findDisplayedByIndex: function(index) {
|
|
let actor = this._list.get_displayed_actor(index);
|
|
return this._findDisplayedByActor(actor);
|
|
},
|
|
|
|
// Returns a display item based on the actor that represents it in
|
|
// the display.
|
|
_findDisplayedByActor: function(actor) {
|
|
for (itemId in this._displayedItems) {
|
|
let item = this._displayedItems[itemId];
|
|
if (item.actor == actor) {
|
|
return item;
|
|
}
|
|
}
|
|
return null;
|
|
},
|
|
|
|
// Selects (e.g. highlights) a display item at the provided index,
|
|
// updates this.selectedItemDetails actor, and emits 'selected' signal.
|
|
_selectIndex: function(index) {
|
|
// Cleanup from the previous item
|
|
if (this.hasSelected()) {
|
|
this._findDisplayedByIndex(this._selectedIndex).markSelected(false);
|
|
}
|
|
|
|
this._selectedIndex = index;
|
|
if (index < 0)
|
|
return
|
|
|
|
// Mark the new item as selected and create its details pane
|
|
let item = this._findDisplayedByIndex(index);
|
|
item.markSelected(true);
|
|
this.emit('selected');
|
|
}
|
|
};
|
|
|
|
Signals.addSignalMethods(GenericDisplay.prototype);
|