311 строки
9.2 KiB
JavaScript
311 строки
9.2 KiB
JavaScript
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
|
|
* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is this file as it was released upon January 6, 2001.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Peter Annema.
|
|
* Portions created by the Initial Developer are Copyright (C) 2000
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Peter Annema <disttsc@bart.nl> (Original Author)
|
|
* Jonas Sicking <sicking@bigfoot.com>
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either of the GNU General Public License Version 2 or later (the "GPL"),
|
|
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
/** Document Zoom Management Code
|
|
*
|
|
* To use this, you'll need to have a <menu id="menu_zoom"/>
|
|
* and a getMarkupDocumentViewer() function which returns a
|
|
* nsIMarkupDocumentViewer.
|
|
*
|
|
**/
|
|
|
|
function ZoomManager() {
|
|
this.bundle = document.getElementById("bundle_viewZoom");
|
|
|
|
// factorAnchor starts on factorOther
|
|
this.factorOther = parseInt(this.bundle.getString("valueOther"));
|
|
this.factorAnchor = this.factorOther;
|
|
}
|
|
|
|
ZoomManager.prototype = {
|
|
instance : null,
|
|
|
|
getInstance : function() {
|
|
if (!ZoomManager.prototype.instance)
|
|
ZoomManager.prototype.instance = new ZoomManager();
|
|
|
|
return ZoomManager.prototype.instance;
|
|
},
|
|
|
|
MIN : 1,
|
|
MAX : 2000,
|
|
|
|
bundle : null,
|
|
|
|
zoomFactorsString : "", // cache
|
|
zoomFactors : null,
|
|
|
|
factorOther : 300,
|
|
factorAnchor : 300,
|
|
steps : 0,
|
|
|
|
pref : Components.classes["@mozilla.org/preferences-service;1"]
|
|
.getService(Components.interfaces.nsIPrefService)
|
|
.getBranch(null),
|
|
|
|
get zoomType() {
|
|
return this.pref.getBoolPref("browser.zoom.full") ? "fullZoom" : "textZoom";
|
|
},
|
|
|
|
get currentZoom() {
|
|
var currentZoom;
|
|
try {
|
|
currentZoom = Math.round(getMarkupDocumentViewer()[this.zoomType] * 100);
|
|
if (this.indexOf(currentZoom) == -1) {
|
|
if (currentZoom != this.factorOther) {
|
|
this.factorOther = currentZoom;
|
|
this.factorAnchor = this.factorOther;
|
|
}
|
|
}
|
|
} catch (e) {
|
|
currentZoom = 100;
|
|
}
|
|
return currentZoom;
|
|
},
|
|
|
|
set currentZoom(aZoom) {
|
|
if (aZoom < this.MIN || aZoom > this.MAX)
|
|
throw Components.results.NS_ERROR_INVALID_ARG;
|
|
|
|
getMarkupDocumentViewer()[this.zoomType] = aZoom / 100;
|
|
},
|
|
|
|
enlarge : function() {
|
|
this.jump(1);
|
|
},
|
|
|
|
reduce : function() {
|
|
this.jump(-1);
|
|
},
|
|
|
|
reset : function() {
|
|
this.currentZoom = 100;
|
|
},
|
|
|
|
getZoomFactors : function() {
|
|
this.ensureZoomFactors();
|
|
|
|
return this.zoomFactors;
|
|
},
|
|
|
|
indexOf : function(aZoom) {
|
|
this.ensureZoomFactors();
|
|
|
|
var index = -1;
|
|
if (this.isZoomInRange(aZoom)) {
|
|
index = this.zoomFactors.length - 1;
|
|
while (index >= 0 && this.zoomFactors[index] != aZoom)
|
|
--index;
|
|
}
|
|
|
|
return index;
|
|
},
|
|
|
|
/***** internal helper functions below here *****/
|
|
|
|
ensureZoomFactors : function() {
|
|
var zoomFactorsString = this.bundle.getString("values");
|
|
if (this.zoomFactorsString != zoomFactorsString) {
|
|
this.zoomFactorsString = zoomFactorsString;
|
|
this.zoomFactors = zoomFactorsString.split(",");
|
|
for (var i = 0; i<this.zoomFactors.length; ++i)
|
|
this.zoomFactors[i] = parseInt(this.zoomFactors[i]);
|
|
}
|
|
},
|
|
|
|
isLevelInRange : function(aLevel) {
|
|
return (aLevel >= 0 && aLevel < this.zoomFactors.length);
|
|
},
|
|
|
|
isZoomInRange : function(aZoom) {
|
|
return (aZoom >= this.zoomFactors[0] && aZoom <= this.zoomFactors[this.zoomFactors.length - 1]);
|
|
},
|
|
|
|
jump : function(aDirection) {
|
|
if (aDirection != -1 && aDirection != 1)
|
|
throw Components.results.NS_ERROR_INVALID_ARG;
|
|
|
|
this.ensureZoomFactors();
|
|
|
|
var currentZoom = this.currentZoom;
|
|
var insertIndex = -1;
|
|
var stepFactor = parseFloat(this.bundle.getString("stepFactor"));
|
|
|
|
// temporarily add factorOther to list
|
|
if (this.isZoomInRange(this.factorOther)) {
|
|
insertIndex = 0;
|
|
while (this.zoomFactors[insertIndex] < this.factorOther)
|
|
++insertIndex;
|
|
|
|
if (this.zoomFactors[insertIndex] != this.factorOther)
|
|
this.zoomFactors.splice(insertIndex, 0, this.factorOther);
|
|
}
|
|
|
|
var factor;
|
|
var done = false;
|
|
|
|
if (this.isZoomInRange(currentZoom)) {
|
|
var index = this.indexOf(currentZoom);
|
|
if (aDirection == -1 && index == 0 ||
|
|
aDirection == 1 && index == this.zoomFactors.length - 1) {
|
|
this.steps = 0;
|
|
this.factorAnchor = this.zoomFactors[index];
|
|
} else {
|
|
factor = this.zoomFactors[index + aDirection];
|
|
done = true;
|
|
}
|
|
}
|
|
|
|
if (!done) {
|
|
this.steps += aDirection;
|
|
factor = this.factorAnchor * Math.pow(stepFactor, this.steps);
|
|
if (factor < this.MIN || factor > this.MAX) {
|
|
this.steps -= aDirection;
|
|
factor = this.factorAnchor * Math.pow(stepFactor, this.steps);
|
|
}
|
|
factor = Math.round(factor);
|
|
if (this.isZoomInRange(factor))
|
|
factor = this.snap(factor);
|
|
else
|
|
this.factorOther = factor;
|
|
}
|
|
|
|
if (insertIndex != -1)
|
|
this.zoomFactors.splice(insertIndex, 1);
|
|
|
|
this.currentZoom = factor;
|
|
},
|
|
|
|
snap : function(aZoom) {
|
|
if (this.isZoomInRange(aZoom)) {
|
|
var level = 0;
|
|
while (this.zoomFactors[level + 1] < aZoom)
|
|
++level;
|
|
|
|
// if aZoom closer to [level + 1] than [level], snap to [level + 1]
|
|
if ((this.zoomFactors[level + 1] - aZoom) < (aZoom - this.zoomFactors[level]))
|
|
++level;
|
|
|
|
aZoom = this.zoomFactors[level];
|
|
}
|
|
|
|
return aZoom;
|
|
}
|
|
}
|
|
|
|
/***** init and helper functions for viewZoomOverlay.xul *****/
|
|
window.addEventListener("load", registerZoomManager, false);
|
|
|
|
function registerZoomManager()
|
|
{
|
|
var zoomMenu = document.getElementById("menu_zoom");
|
|
var zoom = ZoomManager.prototype.getInstance();
|
|
|
|
var parentMenu = zoomMenu.parentNode;
|
|
parentMenu.addEventListener("popupshowing", updateViewMenu, false);
|
|
|
|
var insertBefore = document.getElementById("menu_zoomInsertBefore");
|
|
var popup = insertBefore.parentNode;
|
|
var accessKeys = zoom.bundle.getString("accessKeys").split(",");
|
|
var zoomFactors = zoom.getZoomFactors();
|
|
for (var i = 0; i < zoomFactors.length; ++i) {
|
|
var menuItem = document.createElement("menuitem");
|
|
menuItem.setAttribute("type", "radio");
|
|
menuItem.setAttribute("name", "zoom");
|
|
|
|
var label;
|
|
if (zoomFactors[i] == 100) {
|
|
label = zoom.bundle.getString("labelOriginal");
|
|
menuItem.setAttribute("key", "key_zoomReset");
|
|
}
|
|
else
|
|
label = zoom.bundle.getString("label");
|
|
|
|
menuItem.setAttribute("label", label.replace(/%zoom%/, zoomFactors[i]));
|
|
menuItem.setAttribute("accesskey", accessKeys[i]);
|
|
menuItem.setAttribute("value", zoomFactors[i]);
|
|
popup.insertBefore(menuItem, insertBefore);
|
|
}
|
|
}
|
|
|
|
function updateViewMenu()
|
|
{
|
|
var zoom = ZoomManager.prototype.getInstance();
|
|
|
|
var zoomMenu = document.getElementById("menu_zoom");
|
|
var menuLabel = zoom.bundle.getString(zoom.zoomType).replace(/%zoom%/, zoom.currentZoom);
|
|
zoomMenu.setAttribute("label", menuLabel);
|
|
}
|
|
|
|
function updateZoomMenu()
|
|
{
|
|
var zoom = ZoomManager.prototype.getInstance();
|
|
|
|
var currentZoom = zoom.currentZoom;
|
|
|
|
var zoomOther = document.getElementById("menu_zoomOther");
|
|
var label = zoom.bundle.getString("labelOther");
|
|
zoomOther.setAttribute("label", label.replace(/%zoom%/, zoom.factorOther));
|
|
zoomOther.setAttribute("value", zoom.factorOther);
|
|
|
|
var popup = document.getElementById("menu_zoomPopup");
|
|
var item = popup.firstChild;
|
|
while (item) {
|
|
if (item.getAttribute("name") == "zoom") {
|
|
if (item.getAttribute("value") == currentZoom)
|
|
item.setAttribute("checked","true");
|
|
else
|
|
item.removeAttribute("checked");
|
|
}
|
|
item = item.nextSibling;
|
|
}
|
|
}
|
|
|
|
function setZoomOther()
|
|
{
|
|
var zoom = ZoomManager.prototype.getInstance();
|
|
|
|
// open dialog and ask for new value
|
|
var o = {value: zoom.factorOther, zoomMin: zoom.MIN, zoomMax: zoom.MAX};
|
|
window.openDialog("chrome://communicator/content/askViewZoom.xul", "AskViewZoom", "chrome,modal,titlebar", o);
|
|
if (o.zoomOK)
|
|
zoom.currentZoom = o.value;
|
|
}
|