gecko-dev/browser/modules/ZoomUI.jsm

122 строки
4.2 KiB
JavaScript
Исходник Обычный вид История

// -*- 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";
this.EXPORTED_SYMBOLS = [ "ZoomUI" ];
Components.utils.import("resource://gre/modules/Services.jsm");
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});
},
};
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 gBrowser = event.currentTarget.gBrowser;
let topDoc = event.target.defaultView.top.document;
if (!topDoc.documentElement) {
// In some events, such as loading synthetic documents, the
// documentElement will be null and getBrowserForDocument will
// return null.
return;
}
browser = gBrowser.getBrowserForDocument(topDoc);
} 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
*/
function updateZoomUI(aBrowser, aAnimate = false) {
let win = aBrowser.ownerGlobal;
if (aBrowser != win.gBrowser.selectedBrowser) {
return;
}
let appMenuZoomReset = win.document.getElementById("appMenu-zoomReset-button");
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);
// Hide urlbar zoom button if zoom is at 100% or the customizable control is
// in the toolbar.
urlbarZoomButton.hidden =
(zoomFactor == 100 ||
(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) {
urlbarZoomButton.setAttribute("animate", "true");
} else {
urlbarZoomButton.removeAttribute("animate");
}
urlbarZoomButton.setAttribute("label", label);
}
}
Components.utils.import("resource:///modules/CustomizableUI.jsm");
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);