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telepathyClient: cache avatar images

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Cache avatars to avoid having to re-download them every session.

We use a cache format that is compatible with empathy's, but we don't
actually use empathy's. This could be changed if we wanted.

https://bugzilla.gnome.org/show_bug.cgi?id=614974
This commit is contained in:
Dan Winship 2010-04-14 10:24:14 -04:00
parent 7d7ed7ce7a
commit e83656969e
2 changed files with 105 additions and 56 deletions
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19
js/misc/telepathy.js
View File

@ -26,6 +26,25 @@ function pathToName(path) {
return path.substr(1).replace('/', '.', 'g');
};
// This is tp_escape_as_identifier() from telepathy-glib
function escapeAsIdentifier(name) {
if (!name)
return '_';
// first char is replaced with _XX if it's non-alpha,
// later chars are replaced with _XX if they're non-alphanumeric
if (name.length == 1) {
return name.replace(/[^a-zA-Z]/, _hexEscape);
} else {
return (name[0].replace(/[^a-zA-Z]/, _hexEscape) +
name.substring(1).replace(/[^a-zA-Z0-9]/g, _hexEscape));
}
}
function _hexEscape(ch) {
return '_' + ch.charCodeAt(0).toString(16);
}
// Telepathy D-Bus interface definitions. Note that most of these are
// incomplete, and only cover the methods/properties/signals that
// we're currently using.

142
js/ui/telepathyClient.js
View File

@ -2,6 +2,7 @@
const Clutter = imports.gi.Clutter;
const DBus = imports.dbus;
const GLib = imports.gi.GLib;
const Lang = imports.lang;
const Shell = imports.gi.Shell;
const St = imports.gi.St;
@ -181,20 +182,32 @@ function AvatarManager() {
AvatarManager.prototype = {
_init: function() {
this._connections = {};
// Note that if we changed this to '/telepathy/avatars' then
// we would share cache files with empathy. But since this is
// not documented/guaranteed, it seems a little sketchy
this._cacheDir = GLib.get_user_cache_dir() + '/gnome-shell/avatars';
},
_addConnection: function(conn) {
if (this._connections[conn.getPath()])
return this._connections[conn.getPath()];
let info = {};
// avatarData[handle] describes the icon for @handle:
// either the string 'default', meaning to use the default
// avatar, or an array of bytes containing, eg, PNG data.
info.avatarData = {};
// Figure out the cache subdirectory for this connection by
// parsing the connection manager name (eg, 'gabble') and
// protocol name (eg, 'jabber') from the Connection's path.
// Telepathy requires the D-Bus path for a connection to have
// a specific form, and explicitly says that clients are
// allowed to parse it.
let match = conn.getPath().match(/\/org\/freedesktop\/Telepathy\/Connection\/([^\/]*\/[^\/]*)\/.*/);
if (!match)
throw new Error('Could not parse connection path ' + conn.getPath());
// icons[handle] is an array of the icon actors currently
info.cacheDir = this._cacheDir + '/' + match[1];
GLib.mkdir_with_parents(info.cacheDir, 0700);
// info.token[handle] is the token for @handle's avatar
info.token = {};
// info.icons[handle] is an array of the icon actors currently
// being displayed for @handle. These will be updated
// automatically if @handle's avatar changes.
info.icons = {};
@ -229,39 +242,57 @@ AvatarManager.prototype = {
delete this._connections[conn.getPath()];
},
_getFileForToken: function(info, token) {
return info.cacheDir + '/' + Telepathy.escapeAsIdentifier(token);
},
_setIcon: function(iconBox, info, handle) {
let textureCache = St.TextureCache.get_default();
let token = info.token[handle];
let file;
if (token) {
file = this._getFileForToken(info, token);
if (!GLib.file_test(file, GLib.FileTest.EXISTS))
file = null;
}
if (file) {
let uri = GLib.filename_to_uri(file, null);
iconBox.child = textureCache.load_uri_async(uri, iconBox._size, iconBox._size);
} else {
iconBox.child = textureCache.load_icon_name('stock_person', iconBox._size);
}
},
_updateIcons: function(info, handle) {
if (!info.icons[handle])
return;
for (let i = 0; i < info.icons[handle].length; i++) {
let iconBox = info.icons[handle][i];
this._setIcon(iconBox, info, handle);
}
},
_avatarUpdated: function(conn, handle, token) {
let info = this._connections[conn.getPath()];
if (!info)
return;
if (!info.avatarData[handle]) {
// This would only happen if either (a) the initial
// RequestAvatars() call hasn't returned yet, or (b)
// Telepathy is informing us about avatars we didn't ask
// about. Either way, we don't have to do anything here.
if (info.token[handle] == token)
return;
info.token[handle] = token;
if (token != '') {
let file = this._getFileForToken(info, token);
if (!GLib.file_test(file, GLib.FileTest.EXISTS)) {
info.connectionAvatars.RequestAvatarsRemote([handle]);
return;
}
}
if (token == '') {
// Invoke the next async callback in the chain, telling
// it to use the default image.
this._avatarRetrieved(conn, handle, token, 'default', null);
} else {
// In this case, @token is some sort of UUID. Telepathy
// expects us to cache avatar images to disk and use the
// tokens to figure out when we already have the right
// images cached. But we don't do that, we just
// ignore @token and request the image unconditionally.
info.connectionAvatars.RequestAvatarsRemote([handle]);
}
},
_createIcon: function(iconData, size) {
let textureCache = St.TextureCache.get_default();
if (iconData == 'default')
return textureCache.load_icon_name('stock_person', size);
else
return textureCache.load_from_data(iconData, iconData.length, size);
this._updateIcons(info, handle);
},
_avatarRetrieved: function(conn, handle, token, avatarData, mimeType) {
@ -269,19 +300,21 @@ AvatarManager.prototype = {
if (!info)
return;
info.avatarData[handle] = avatarData;
if (!info.icons[handle])
return;
for (let i = 0; i < info.icons[handle].length; i++) {
let iconBox = info.icons[handle][i];
let size = iconBox.child.height;
iconBox.child = this._createIcon(avatarData, size);
let file = this._getFileForToken(info, token);
let success = false;
try {
success = GLib.file_set_contents(file, avatarData, avatarData.length);
} catch (e) {
logError(e, 'Error caching avatar data');
}
if (success)
this._updateIcons(info, handle);
},
createAvatar: function(conn, handle, size) {
let iconBox = new St.Bin({ style_class: 'avatar-box' });
iconBox._size = size;
let info = this._connections[conn.getPath()];
if (!info)
@ -298,22 +331,19 @@ AvatarManager.prototype = {
info.icons[handle].splice(i, 1);
}));
let avatarData = info.avatarData[handle];
if (avatarData) {
iconBox.child = this._createIcon(avatarData, size);
return iconBox;
}
// If we already have the icon cached and know its token, this
// will fill it in. Otherwise it will fill in the default
// icon.
this._setIcon(iconBox, info, handle);
// Fill in the default icon and then asynchronously load
// the real avatar.
iconBox.child = this._createIcon('default', size);
info.connectionAvatars.GetKnownAvatarTokensRemote([handle], Lang.bind(this,
function (tokens, err) {
if (tokens && tokens[handle])
info.connectionAvatars.RequestAvatarsRemote([handle]);
else
info.avatarData[handle] = 'default';
}));
// Asynchronously load the real avatar if we don't have it yet.
if (info.token[handle] == null) {
info.connectionAvatars.GetKnownAvatarTokensRemote([handle], Lang.bind(this,
function (tokens, err) {
let token = tokens && tokens[handle] ? tokens[handle] : '';
this._avatarUpdated(conn, handle, token);
}));
}
return iconBox;
}