1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
// -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
var EXPORTED_SYMBOLS = ["ZoomUI"];
const gLoadContext = Cu.createLoadContext();
const gContentPrefs = Cc["@mozilla.org/content-pref/service;1"].getService(
Ci.nsIContentPrefService2
);
const gZoomPropertyName = "browser.content.full-zoom";
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
PanelMultiView: "resource:///modules/PanelMultiView.sys.mjs",
});
var ZoomUI = {
init(aWindow) {
aWindow.addEventListener("EndSwapDocShells", onEndSwapDocShells, true);
aWindow.addEventListener("FullZoomChange", onZoomChange);
aWindow.addEventListener("TextZoomChange", onZoomChange);
aWindow.addEventListener(
"unload",
() => {
aWindow.removeEventListener(
"EndSwapDocShells",
onEndSwapDocShells,
true
);
aWindow.removeEventListener("FullZoomChange", onZoomChange);
aWindow.removeEventListener("TextZoomChange", onZoomChange);
},
{ once: true }
);
},
/**
* Gets the global browser.content.full-zoom content preference.
*
* @returns Promise<prefValue>
* Resolves to the preference value (float) when done.
*/
getGlobalValue() {
return new Promise(resolve => {
let cachedVal = gContentPrefs.getCachedGlobal(
gZoomPropertyName,
gLoadContext
);
if (cachedVal) {
// We've got cached information, though it may be we've cached
// an undefined value, or the cached info is invalid. To ensure
// a valid return, we opt to return the default 1.0 in the
// undefined and invalid cases.
resolve(parseFloat(cachedVal.value) || 1.0);
return;
}
// Otherwise, nothing is cached, so we must do a full lookup
// with `gContentPrefs.getGlobal()`.
let value = 1.0;
gContentPrefs.getGlobal(gZoomPropertyName, gLoadContext, {
handleResult(pref) {
if (pref.value) {
value = parseFloat(pref.value);
}
},
handleCompletion(reason) {
resolve(value);
},
handleError(error) {
console.error(error);
},
});
});
},
};
function fullZoomLocationChangeObserver(aSubject, aTopic) {
// If the tab was the last one in its window and has been dragged to another
// window, the original browser's window will be unavailable here. Since that
// window is closing, we can just ignore this notification.
if (!aSubject.ownerGlobal) {
return;
}
updateZoomUI(aSubject, false);
}
Services.obs.addObserver(
fullZoomLocationChangeObserver,
"browser-fullZoom:location-change"
);
function onEndSwapDocShells(event) {
updateZoomUI(event.originalTarget);
}
function onZoomChange(event) {
let browser;
if (event.target.nodeType == event.target.DOCUMENT_NODE) {
// In non-e10s, the event is dispatched on the contentDocument
// so we need to jump through some hoops to get to the <xul:browser>.
let topDoc = event.target.defaultView.top.document;
if (!topDoc.documentElement) {
// In some events, such as loading synthetic documents, the
// documentElement will be null and we won't be able to find
// an associated browser.
return;
}
browser = topDoc.ownerGlobal.docShell.chromeEventHandler;
} else {
browser = event.originalTarget;
}
updateZoomUI(browser, true);
}
/**
* Updates zoom controls.
*
* @param {object} aBrowser The browser that the zoomed content resides in.
* @param {boolean} aAnimate Should be True for all cases unless the zoom
* change is related to tab switching. Optional
*/
async function updateZoomUI(aBrowser, aAnimate = false) {
let win = aBrowser.ownerGlobal;
if (!win.gBrowser || win.gBrowser.selectedBrowser != aBrowser) {
return;
}
let appMenuZoomReset = lazy.PanelMultiView.getViewNode(
win.document,
"appMenu-zoomReset-button2"
);
// Exit early if UI elements aren't present.
if (!appMenuZoomReset) {
return;
}
let customizableZoomControls = win.document.getElementById("zoom-controls");
let customizableZoomReset = win.document.getElementById("zoom-reset-button");
let urlbarZoomButton = win.document.getElementById("urlbar-zoom-button");
let zoomFactor = Math.round(win.ZoomManager.zoom * 100);
let defaultZoom = Math.round((await ZoomUI.getGlobalValue()) * 100);
if (!win.gBrowser || win.gBrowser.selectedBrowser != aBrowser) {
// Because the CPS call is async, at this point the selected browser
// may have changed. We should re-check whether the browser for which we've
// been notified is still the selected browser and bail out if not.
// If the selected browser changed (again), we will have been called again
// with the "right" browser, and that'll update the zoom level.
return;
}
// Hide urlbar zoom button if zoom is at the default zoom level,
// if we're viewing an about:blank page with an empty/null
// principal, if the PDF viewer is currently open,
// or if the customizable control is in the toolbar.
urlbarZoomButton.hidden =
defaultZoom == zoomFactor ||
(aBrowser.currentURI.spec == "about:blank" &&
(!aBrowser.contentPrincipal ||
aBrowser.contentPrincipal.isNullPrincipal)) ||
(aBrowser.contentPrincipal &&
aBrowser.contentPrincipal.spec == "resource://pdf.js/web/viewer.html") ||
(customizableZoomControls &&
customizableZoomControls.getAttribute("cui-areatype") == "toolbar");
let label = win.gNavigatorBundle.getFormattedString("zoom-button.label", [
zoomFactor,
]);
if (appMenuZoomReset) {
appMenuZoomReset.setAttribute("label", label);
}
if (customizableZoomReset) {
customizableZoomReset.setAttribute("label", label);
}
if (!urlbarZoomButton.hidden) {
if (aAnimate && !win.gReduceMotion) {
urlbarZoomButton.setAttribute("animate", "true");
} else {
urlbarZoomButton.removeAttribute("animate");
}
urlbarZoomButton.setAttribute("label", label);
}
win.FullZoom.updateCommands();
}
const { CustomizableUI } = ChromeUtils.importESModule(
"resource:///modules/CustomizableUI.sys.mjs"
);
let customizationListener = {};
customizationListener.onWidgetAdded =
customizationListener.onWidgetRemoved =
customizationListener.onWidgetMoved =
function (aWidgetId) {
if (aWidgetId == "zoom-controls") {
for (let window of CustomizableUI.windows) {
updateZoomUI(window.gBrowser.selectedBrowser);
}
}
};
customizationListener.onWidgetReset = customizationListener.onWidgetUndoMove =
function (aWidgetNode) {
if (aWidgetNode.id == "zoom-controls") {
updateZoomUI(aWidgetNode.ownerGlobal.gBrowser.selectedBrowser);
}
};
CustomizableUI.addListener(customizationListener);
|
