417 lines
15 KiB
JavaScript
417 lines
15 KiB
JavaScript
/* -*- mode: js2; js2-basic-offset: 4; indent-tabs-mode: nil -*- */
|
|
|
|
const Signals = imports.signals;
|
|
const Clutter = imports.gi.Clutter;
|
|
const Gio = imports.gi.Gio;
|
|
const Pango = imports.gi.Pango;
|
|
const Gtk = imports.gi.Gtk;
|
|
|
|
const Tidy = imports.gi.Tidy;
|
|
const Big = imports.gi.Big;
|
|
const Shell = imports.gi.Shell;
|
|
|
|
const ITEM_DISPLAY_NAME_COLOR = new Clutter.Color();
|
|
ITEM_DISPLAY_NAME_COLOR.from_pixel(0xffffffff);
|
|
const ITEM_DISPLAY_DESCRIPTION_COLOR = new Clutter.Color();
|
|
ITEM_DISPLAY_DESCRIPTION_COLOR.from_pixel(0xffffffbb);
|
|
const ITEM_DISPLAY_BACKGROUND_COLOR = new Clutter.Color();
|
|
ITEM_DISPLAY_BACKGROUND_COLOR.from_pixel(0x00000000);
|
|
const ITEM_DISPLAY_SELECTED_BACKGROUND_COLOR = new Clutter.Color();
|
|
ITEM_DISPLAY_SELECTED_BACKGROUND_COLOR.from_pixel(0x00ff0055);
|
|
|
|
const ITEM_DISPLAY_HEIGHT = 50;
|
|
const ITEM_DISPLAY_ICON_SIZE = 48;
|
|
const ITEM_DISPLAY_PADDING = 1;
|
|
const ITEM_DISPLAY_MARGIN = 4;
|
|
|
|
/* This is a virtual class that represents a single display item containing
|
|
* a name, a description, and an icon. It allows selecting an item and represents
|
|
* it by highlighting it with a different background color than the default.
|
|
*
|
|
* availableWidth - total width available for the item
|
|
*/
|
|
function GenericDisplayItem(availableWidth) {
|
|
this._init(name, description, icon, availableWidth);
|
|
}
|
|
|
|
GenericDisplayItem.prototype = {
|
|
_init: function(availableWidth) {
|
|
this._availableWidth = availableWidth;
|
|
let me = this;
|
|
|
|
this._group = new Clutter.Group({reactive: true,
|
|
width: availableWidth,
|
|
height: ITEM_DISPLAY_HEIGHT});
|
|
this._group.connect('button-press-event', function(group, e) {
|
|
me.emit('activate');
|
|
return true;
|
|
});
|
|
|
|
this._bg = new Big.Box({ background_color: ITEM_DISPLAY_BACKGROUND_COLOR,
|
|
corner_radius: 4,
|
|
x: 0, y: 0,
|
|
width: availableWidth, height: ITEM_DISPLAY_HEIGHT });
|
|
this._group.add_actor(this._bg);
|
|
|
|
this._name = null;
|
|
this._description = null;
|
|
this._icon = null;
|
|
|
|
this.actor = this._group;
|
|
},
|
|
|
|
//// Public methods ////
|
|
|
|
// Highlights the item by setting a different background color than the default
|
|
// if isSelected is true, removes the highlighting otherwise.
|
|
markSelected: function(isSelected) {
|
|
let color;
|
|
if (isSelected)
|
|
color = ITEM_DISPLAY_SELECTED_BACKGROUND_COLOR;
|
|
else
|
|
color = ITEM_DISPLAY_BACKGROUND_COLOR;
|
|
this._bg.background_color = color;
|
|
},
|
|
|
|
//// Pure virtual public methods ////
|
|
|
|
// Performes an action associated with launching this item, such as opening a file or an application.
|
|
launch: function() {
|
|
throw new Error("Not implemented");
|
|
},
|
|
|
|
//// Protected methods ////
|
|
|
|
/*
|
|
* Creates the graphical elements for the item based on the item information.
|
|
*
|
|
* nameText - name of the item
|
|
* descriptionText - short description of the item
|
|
* iconActor - ClutterTexture containing the icon image which should be 48x48 pixels
|
|
*/
|
|
_setItemInfo: function(nameText, descriptionText, iconActor) {
|
|
if (this._name != null) {
|
|
// this also removes this._name from the parent container,
|
|
// so we don't need to call this._group.remove_actor(this._name) directly
|
|
this._name.destroy();
|
|
this._name = null;
|
|
}
|
|
if (this._description != null) {
|
|
this._description.destroy();
|
|
this._description = null;
|
|
}
|
|
if (this._icon != null) {
|
|
// though we get the icon from elsewhere, we assume its ownership here,
|
|
// and therefore should be responsible for distroying it
|
|
this._icon.destroy();
|
|
this._icon = null;
|
|
}
|
|
|
|
this._icon = iconActor;
|
|
this._group.add_actor(this._icon);
|
|
|
|
let text_width = this._availableWidth - (ITEM_DISPLAY_ICON_SIZE + 4);
|
|
this._name = new Clutter.Label({ color: ITEM_DISPLAY_NAME_COLOR,
|
|
font_name: "Sans 14px",
|
|
width: text_width,
|
|
ellipsize: Pango.EllipsizeMode.END,
|
|
text: nameText,
|
|
x: ITEM_DISPLAY_ICON_SIZE + 4,
|
|
y: ITEM_DISPLAY_PADDING});
|
|
this._group.add_actor(this._name);
|
|
this._description = new Clutter.Label({ color: ITEM_DISPLAY_DESCRIPTION_COLOR,
|
|
font_name: "Sans 12px",
|
|
width: text_width,
|
|
ellipsize: Pango.EllipsizeMode.END,
|
|
text: descriptionText,
|
|
x: this._name.x,
|
|
y: this._name.height + 4})
|
|
this._group.add_actor(this._description);
|
|
}
|
|
};
|
|
|
|
Signals.addSignalMethods(GenericDisplayItem.prototype);
|
|
|
|
/* This is a virtual class that represents a display containing a collection of items
|
|
* that can be filtered with a search string.
|
|
*
|
|
* width - width available for the display
|
|
* height - height available for the display
|
|
*/
|
|
function GenericDisplay(width, height) {
|
|
this._init(width, height);
|
|
}
|
|
|
|
GenericDisplay.prototype = {
|
|
_init : function(width, height) {
|
|
this._search = '';
|
|
this._width = width;
|
|
this._height = height;
|
|
this._grid = new Tidy.Grid({width: width, height: height});
|
|
// map<itemId, Object> where Object represents the item info
|
|
this._allItems = {};
|
|
// map<itemId, GenericDisplayItem>
|
|
this._displayedItems = {};
|
|
this._displayedItemsCount = 0;
|
|
// GenericDisplayItem
|
|
this._activatedItem = null;
|
|
this._selectedIndex = -1;
|
|
this._keepDisplayCurrent = false;
|
|
// TODO: this should be Math.floor, but right now we get too few items if we apply it
|
|
this._maxItems = this._height / (ITEM_DISPLAY_HEIGHT + ITEM_DISPLAY_MARGIN);
|
|
this.actor = this._grid;
|
|
},
|
|
|
|
//// Public methods ////
|
|
|
|
// Sets the search string and displays the matching items.
|
|
setSearch: function(text) {
|
|
this._search = text.toLowerCase();
|
|
this._redisplay();
|
|
},
|
|
|
|
// Sets this._activatedItem to the item that is selected and emits 'activated' signal.
|
|
// The reason we don't call launch() on the activated item right away is because we want
|
|
// the class that contains the display to do all other necessary actions and then call
|
|
// doActivate(). Currently, when a selected item is activated we only clear the search
|
|
// entry, but when an item that was not selected is clicked, we want to move the selection
|
|
// to the clicked item first. This needs to happen in the class that contains the display
|
|
// because the selection might be moved from some other display that class contains.
|
|
activateSelected: function() {
|
|
if (this._selectedIndex != -1) {
|
|
let selected = this._findDisplayedByIndex(this._selectedIndex);
|
|
this._activatedItem = selected;
|
|
this.emit('activated');
|
|
}
|
|
},
|
|
|
|
// Moves the selection one up. If the selection was already on the top item, it's moved
|
|
// to the bottom one. Returns true if the selection actually moved up, false if it wrapped
|
|
// around to the bottom.
|
|
selectUp: function() {
|
|
let selectedUp = true;
|
|
let prev = this._selectedIndex - 1;
|
|
if (this._selectedIndex <= 0) {
|
|
prev = this._displayedItemsCount - 1;
|
|
selectedUp = false;
|
|
}
|
|
this._selectIndex(prev);
|
|
return selectedUp;
|
|
},
|
|
|
|
// Moves the selection one down. If the selection was already on the bottom item, it's moved
|
|
// to the top one. Returns true if the selection actually moved down, false if it wrapped
|
|
// around to the top.
|
|
selectDown: function() {
|
|
let selectedDown = true;
|
|
let next = this._selectedIndex + 1;
|
|
if (this._selectedIndex == this._displayedItemsCount - 1) {
|
|
next = 0;
|
|
selectedDown = false;
|
|
}
|
|
this._selectIndex(next);
|
|
return selectedDown;
|
|
},
|
|
|
|
// Selects the first item among the displayed items.
|
|
selectFirstItem: function() {
|
|
if (this.hasItems())
|
|
this._selectIndex(0);
|
|
},
|
|
|
|
// Selects the last item among the displayed items.
|
|
selectLastItem: function() {
|
|
if (this.hasItems())
|
|
this._selectIndex(this._displayedItemsCount - 1);
|
|
},
|
|
|
|
// Returns true if the display has some item selected.
|
|
hasSelected: function() {
|
|
return this._selectedIndex != -1;
|
|
},
|
|
|
|
// Removes selection if some display item is selected.
|
|
unsetSelected: function() {
|
|
this._selectIndex(-1);
|
|
},
|
|
|
|
// Returns true if the display has any displayed items.
|
|
hasItems: function() {
|
|
return this._displayedItemsCount > 0;
|
|
},
|
|
|
|
// Highlights the activated item and launches it.
|
|
doActivate: function() {
|
|
if (this._activatedItem != null) {
|
|
// We update the selection, so that in case an item was selected by clicking on it and
|
|
// it is different from an item that was previously selected, we can highlight the new selection.
|
|
this._selectIndex(this._getIndexOfDisplayedActor(this._activatedItem.actor));
|
|
this._activatedItem.launch();
|
|
}
|
|
},
|
|
|
|
// Updates the displayed items and makes the display actor visible.
|
|
show: function() {
|
|
this._keepDisplayCurrent = true;
|
|
this._redisplay();
|
|
this._grid.show();
|
|
},
|
|
|
|
// Hides the display actor.
|
|
hide: function() {
|
|
this._grid.hide();
|
|
this._keepDisplayCurrent = false;
|
|
},
|
|
|
|
//// Protected methods ////
|
|
|
|
// 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 me = this;
|
|
|
|
let itemInfo = this._allItems[itemId];
|
|
let displayItem = this._createDisplayItem(itemInfo);
|
|
|
|
displayItem.connect('activate', function() {
|
|
me._activatedItem = displayItem;
|
|
me.emit('activated');
|
|
});
|
|
this._grid.add_actor(displayItem.actor);
|
|
this._displayedItems[itemId] = displayItem;
|
|
this._displayedItemsCount++;
|
|
},
|
|
|
|
// Removes an item identifed by the itemId from the displayed items.
|
|
_removeDisplayItem: function(itemId) {
|
|
let displayItem = this._displayedItems[itemId];
|
|
displayItem.actor.destroy();
|
|
delete this._displayedItems[itemId];
|
|
this._displayedItemsCount--;
|
|
},
|
|
|
|
// Removes all displayed items.
|
|
_removeAllDisplayItems: function() {
|
|
for (itemId in this._displayedItems)
|
|
this._removeDisplayItem(itemId);
|
|
},
|
|
|
|
// Updates the displayed items, applying the search string if one exists.
|
|
_redisplay: function() {
|
|
if (!this._keepDisplayCurrent)
|
|
return;
|
|
|
|
this._refreshCache();
|
|
if (!this._search)
|
|
this._setDefaultList();
|
|
else
|
|
this._doSearchFilter();
|
|
|
|
if (this.hasSelected()) {
|
|
this._selectedIndex = -1;
|
|
this.selectFirstItem();
|
|
}
|
|
|
|
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");
|
|
},
|
|
|
|
// Sorts the list of item ids in-place based on the order in which the items
|
|
// associated with the ids should be displayed.
|
|
_sortItems: function(itemIds) {
|
|
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 ////
|
|
|
|
// Applies the search string to the list of items to find matches,
|
|
// and displays up to this._maxItems that matched.
|
|
_doSearchFilter: function() {
|
|
this._removeAllDisplayItems();
|
|
let matchedItems = [];
|
|
for (itemId in this._allItems) {
|
|
let item = this._allItems[itemId];
|
|
if (this._isInfoMatching(item, this._search))
|
|
matchedItems.push(itemId);
|
|
}
|
|
this._sortItems(matchedItems);
|
|
for (let i = 0; i < matchedItems.length && i < this._maxItems; i++) {
|
|
this._addDisplayItem(matchedItems[i]);
|
|
}
|
|
},
|
|
|
|
// Returns a display item based on its index in the ordering of the
|
|
// display children.
|
|
_findDisplayedByIndex: function(index) {
|
|
let displayedActors = this._grid.get_children();
|
|
let actor = displayedActors[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;
|
|
},
|
|
|
|
// Returns and index that the actor has in the ordering of the display's
|
|
// children.
|
|
_getIndexOfDisplayedActor: function(actor) {
|
|
let children = this._grid.get_children();
|
|
for (let i = 0; i < children.length; i++) {
|
|
if (children[i] == actor)
|
|
return i;
|
|
}
|
|
return -1;
|
|
},
|
|
|
|
// Selects (e.g. highlights) a display item at the provided index.
|
|
_selectIndex: function(index) {
|
|
if (this._selectedIndex != -1) {
|
|
let prev = this._findDisplayedByIndex(this._selectedIndex);
|
|
prev.markSelected(false);
|
|
}
|
|
this._selectedIndex = index;
|
|
if (index != -1 && index < this._displayedItemsCount) {
|
|
let item = this._findDisplayedByIndex(index);
|
|
item.markSelected(true);
|
|
}
|
|
}
|
|
};
|
|
|
|
Signals.addSignalMethods(GenericDisplay.prototype);
|