зеркало из https://github.com/mozilla/gecko-dev.git
114 строки
3.0 KiB
JavaScript
114 строки
3.0 KiB
JavaScript
// -*- 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/. */
|
|
|
|
/** Document Zoom Management Code
|
|
*
|
|
* To use this, you'll need to have a getBrowser() function or use the methods
|
|
* that accept a browser to be modified.
|
|
**/
|
|
|
|
ChromeUtils.import("resource://gre/modules/Services.jsm");
|
|
|
|
var ZoomManager = {
|
|
get MIN() {
|
|
delete this.MIN;
|
|
return this.MIN = Services.prefs.getIntPref("zoom.minPercent") / 100;
|
|
},
|
|
|
|
get MAX() {
|
|
delete this.MAX;
|
|
return this.MAX = Services.prefs.getIntPref("zoom.maxPercent") / 100;
|
|
},
|
|
|
|
get useFullZoom() {
|
|
return Services.prefs.getBoolPref("browser.zoom.full");
|
|
},
|
|
|
|
set useFullZoom(aVal) {
|
|
Services.prefs.setBoolPref("browser.zoom.full", aVal);
|
|
return aVal;
|
|
},
|
|
|
|
get zoom() {
|
|
return this.getZoomForBrowser(getBrowser());
|
|
},
|
|
|
|
getZoomForBrowser: function ZoomManager_getZoomForBrowser(aBrowser) {
|
|
let zoom = (this.useFullZoom || aBrowser.isSyntheticDocument)
|
|
? aBrowser.fullZoom : aBrowser.textZoom;
|
|
// Round to remove any floating-point error.
|
|
return Number(zoom ? zoom.toFixed(2) : 1);
|
|
},
|
|
|
|
set zoom(aVal) {
|
|
this.setZoomForBrowser(getBrowser(), aVal);
|
|
return aVal;
|
|
},
|
|
|
|
setZoomForBrowser: function ZoomManager_setZoomForBrowser(aBrowser, aVal) {
|
|
if (aVal < this.MIN || aVal > this.MAX)
|
|
throw Cr.NS_ERROR_INVALID_ARG;
|
|
|
|
if (this.useFullZoom || aBrowser.isSyntheticDocument) {
|
|
aBrowser.textZoom = 1;
|
|
aBrowser.fullZoom = aVal;
|
|
} else {
|
|
aBrowser.textZoom = aVal;
|
|
aBrowser.fullZoom = 1;
|
|
}
|
|
},
|
|
|
|
get zoomValues() {
|
|
var zoomValues = Services.prefs.getCharPref("toolkit.zoomManager.zoomValues")
|
|
.split(",").map(parseFloat);
|
|
zoomValues.sort((a, b) => a - b);
|
|
|
|
while (zoomValues[0] < this.MIN)
|
|
zoomValues.shift();
|
|
|
|
while (zoomValues[zoomValues.length - 1] > this.MAX)
|
|
zoomValues.pop();
|
|
|
|
delete this.zoomValues;
|
|
return this.zoomValues = zoomValues;
|
|
},
|
|
|
|
enlarge: function ZoomManager_enlarge() {
|
|
var i = this.zoomValues.indexOf(this.snap(this.zoom)) + 1;
|
|
if (i < this.zoomValues.length)
|
|
this.zoom = this.zoomValues[i];
|
|
},
|
|
|
|
reduce: function ZoomManager_reduce() {
|
|
var i = this.zoomValues.indexOf(this.snap(this.zoom)) - 1;
|
|
if (i >= 0)
|
|
this.zoom = this.zoomValues[i];
|
|
},
|
|
|
|
reset: function ZoomManager_reset() {
|
|
this.zoom = 1;
|
|
},
|
|
|
|
toggleZoom: function ZoomManager_toggleZoom() {
|
|
var zoomLevel = this.zoom;
|
|
|
|
this.useFullZoom = !this.useFullZoom;
|
|
this.zoom = zoomLevel;
|
|
},
|
|
|
|
snap: function ZoomManager_snap(aVal) {
|
|
var values = this.zoomValues;
|
|
for (var i = 0; i < values.length; i++) {
|
|
if (values[i] >= aVal) {
|
|
if (i > 0 && aVal - values[i - 1] < values[i] - aVal)
|
|
i--;
|
|
return values[i];
|
|
}
|
|
}
|
|
return values[i - 1];
|
|
},
|
|
};
|