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Better caching for document textures and information

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Move thumbnail creation into ShellTextureCache.  It's now asynchronous,
and we cache the result.

Create a DocManager class which keeps around the DocInfo objects between
invocations.  This is also where we ensure we remove thumbnails for
recent items not known anymore.
This commit is contained in:
Colin Walters
2009-07-08 21:06:06 -04:00
parent 1cb6fc004b
commit 5d067ec718
6 changed files with 300 additions and 115 deletions
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94
js/misc/docInfo.js
View File

@ -5,6 +5,8 @@ const Gio = imports.gi.Gio;
const Gtk = imports.gi.Gtk;
const Shell = imports.gi.Shell;
const Lang = imports.lang;
const Signals = imports.signals;
const Main = imports.ui.main;
const THUMBNAIL_ICON_MARGIN = 2;
@ -22,34 +24,19 @@ DocInfo.prototype = {
},
createIcon : function(size) {
let icon = new Clutter.Texture();
let iconPixbuf;
let icon = null;
let defaultPixbuf = this._recentInfo.get_icon(size);
if (this.uri.match("^file://"))
iconPixbuf = Shell.get_thumbnail(this.uri, this.mimeType);
if (iconPixbuf) {
// We calculate the width and height of the texture so as
// to preserve the aspect ratio of the thumbnail. Because
// the images generated based on thumbnails don't have an
// internal padding like system icons do, we create a
// slightly smaller texture and then create a group around
// it for padding purposes
let scalingFactor = (size - THUMBNAIL_ICON_MARGIN * 2) / Math.max(iconPixbuf.get_width(), iconPixbuf.get_height());
icon.set_width(Math.ceil(iconPixbuf.get_width() * scalingFactor));
icon.set_height(Math.ceil(iconPixbuf.get_height() * scalingFactor));
Shell.clutter_texture_set_from_pixbuf(icon, iconPixbuf);
let group = new Clutter.Group({ width: size,
height: size });
group.add_actor(icon);
icon.set_position(THUMBNAIL_ICON_MARGIN, THUMBNAIL_ICON_MARGIN);
return group;
} else {
Shell.clutter_texture_set_from_pixbuf(icon, this._recentInfo.get_icon(size));
return icon;
if (this.uri.match("^file://")) {
icon = Shell.TextureCache.get_default().load_thumbnail(size, this.uri, this.mimeType,
defaultPixbuf);
}
if (!icon) {
icon = new Clutter.Texture({});
Shell.clutter_texture_set_from_pixbuf(icon, defaultPixbuf);
}
return icon;
},
launch : function() {
@ -112,3 +99,58 @@ DocInfo.prototype = {
return this._recentInfo.get_modified();
}
};
var docManagerInstance = null;
function getDocManager(size) {
if (docManagerInstance == null)
docManagerInstance = new DocManager(size);
return docManagerInstance;
}
function DocManager(size) {
this._init(size);
}
DocManager.prototype = {
_init: function(iconSize) {
this._iconSize = iconSize;
this._recentManager = Gtk.RecentManager.get_default();
this._items = {};
this._recentManager.connect('changed', Lang.bind(this, function(recentManager) {
this._reload();
this.emit('changed');
}));
this._reload();
},
_reload: function() {
let docs = this._recentManager.get_items();
let newItems = {};
for (let i = 0; i < docs.length; i++) {
let recentInfo = docs[i];
let docInfo = new DocInfo(recentInfo);
// we use GtkRecentInfo URI as an item Id
newItems[docInfo.uri] = docInfo;
}
let deleted = {};
for (var uri in this._items) {
if (!(uri in newItems))
deleted[uri] = 1;
}
/* If we'd cached any thumbnail references that no longer exist,
dump them here */
let texCache = Shell.TextureCache.get_default();
for (var uri in deleted) {
texCache.unref_thumbnail(this._iconSize, uri);
}
this._items = newItems;
},
getItems: function() {
return this._items;
}
}
Signals.addSignalMethods(DocManager.prototype);