Revision control
Copy as Markdown
Other Tools
// -*- 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
/* globals getBrowser */
/** Document Zoom Management Code
*
* Forked from M-C since we don't provide a global gBrowser variable.
*
*/
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);
},
get zoom() {
return this.getZoomForBrowser(getBrowser());
},
useFullZoomForBrowser(aBrowser) {
return this.useFullZoom || aBrowser.isSyntheticDocument;
},
getFullZoomForBrowser(aBrowser) {
if (!this.useFullZoomForBrowser(aBrowser)) {
return 1.0;
}
return this.getZoomForBrowser(aBrowser);
},
getZoomForBrowser(aBrowser) {
const zoom = this.useFullZoomForBrowser(aBrowser)
? 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);
},
setZoomForBrowser(browser, val) {
if (val < this.MIN || val > this.MAX) {
throw Components.Exception(
`invalid zoom value: ${val}`,
Cr.NS_ERROR_INVALID_ARG
);
}
const fullZoom = this.useFullZoomForBrowser(browser);
browser.textZoom = fullZoom ? 1 : val;
browser.fullZoom = fullZoom ? val : 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(browser = getBrowser()) {
const i =
this.zoomValues.indexOf(this.snap(this.getZoomForBrowser(browser))) + 1;
if (i < this.zoomValues.length) {
this.setZoomForBrowser(browser, this.zoomValues[i]);
}
},
reduce(browser = getBrowser()) {
const i =
this.zoomValues.indexOf(this.snap(this.getZoomForBrowser(browser))) - 1;
if (i >= 0) {
this.setZoomForBrowser(browser, this.zoomValues[i]);
}
},
reset(browser = getBrowser()) {
this.setZoomForBrowser(browser, 1);
},
toggleZoom(browser = getBrowser()) {
const zoomLevel = this.getZoomForBrowser();
this.useFullZoom = !this.useFullZoom;
this.setZoomForBrowser(browser, zoomLevel);
},
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];
},
scrollZoomEnlarge(messagePaneBrowser) {
let zoom = messagePaneBrowser.fullZoom;
zoom += 0.1;
const zoomMax = Services.prefs.getIntPref("zoom.maxPercent") / 100;
if (zoom > zoomMax) {
zoom = zoomMax;
}
messagePaneBrowser.fullZoom = zoom;
},
scrollReduceEnlarge(messagePaneBrowser) {
let zoom = messagePaneBrowser.fullZoom;
zoom -= 0.1;
const zoomMin = Services.prefs.getIntPref("zoom.minPercent") / 100;
if (zoom < zoomMin) {
zoom = zoomMin;
}
messagePaneBrowser.fullZoom = zoom;
},
};