376 lines
14 KiB
JavaScript
376 lines
14 KiB
JavaScript
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/* -*- mode: js2; js2-basic-offset: 4; indent-tabs-mode: nil -*- */
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const DBus = imports.dbus;
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const Main = imports.ui.main;
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const MAG_SERVICE_NAME = 'org.gnome.Magnifier';
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const MAG_SERVICE_PATH = '/org/gnome/Magnifier';
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const ZOOM_SERVICE_NAME = 'org.gnome.Magnifier.ZoomRegion';
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const ZOOM_SERVICE_PATH = '/org/gnome/Magnifier/ZoomRegion';
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// Subset of gnome-mag's Magnifier dbus interface -- to be expanded. See:
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// http://git.gnome.org/browse/gnome-mag/tree/xml/...Magnifier.xml
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const MagnifierIface = {
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name: MAG_SERVICE_NAME,
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methods: [
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{ name: 'setActive', inSignature: 'b', outSignature: '' },
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{ name: 'isActive', inSignature: '', outSignature: 'b' },
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{ name: 'showCursor', inSignature: '', outSignature: '' },
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{ name: 'hideCursor', inSignature: '', outSignature: '' },
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{ name: 'createZoomRegion', inSignature: 'ddaiai', outSignature: 'o' },
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{ name: 'addZoomRegion', inSignature: 'o', outSignature: 'b' },
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{ name: 'getZoomRegions', inSignature: '', outSignature: 'ao' },
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{ name: 'clearAllZoomRegions', inSignature: '', outSignature: '' },
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{ name: 'fullScreenCapable', inSignature: '', outSignature: 'b' },
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{ name: 'setCrosswireSize', inSignature: 'i', outSignature: '' },
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{ name: 'getCrosswireSize', inSignature: '', outSignature: 'i' },
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{ name: 'setCrosswireLength', inSignature: 'i', outSignature: '' },
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{ name: 'getCrosswireLength', inSignature: '', outSignature: 'i' },
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{ name: 'setCrosswireClip', inSignature: 'b', outSignature: '' },
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{ name: 'getCrosswireClip', inSignature: '', outSignature: 'b' },
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{ name: 'setCrosswireColor', inSignature: 'u', outSignature: '' },
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{ name: 'getCrosswireColor', inSignature: '', outSignature: 'u' }
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],
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signals: [],
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properties: []
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};
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// Subset of gnome-mag's ZoomRegion dbus interface -- to be expanded. See:
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// http://git.gnome.org/browse/gnome-mag/tree/xml/...ZoomRegion.xml
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const ZoomRegionIface = {
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name: ZOOM_SERVICE_NAME,
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methods: [
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{ name: 'setMagFactor', inSignature: 'dd', outSignature: ''},
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{ name: 'getMagFactor', inSignature: '', outSignature: 'dd' },
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{ name: 'setRoi', inSignature: 'ai', outSignature: '' },
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{ name: 'getRoi', inSignature: '', outSignature: 'ai' },
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{ name: 'shiftContentsTo', inSignature: 'ii', outSignature: 'b' },
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{ name: 'moveResize', inSignature: 'ai', outSignature: '' }
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],
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signals: [],
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properties: []
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};
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// For making unique ZoomRegion DBus proxy object paths of the form:
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// "/org/gnome/Magnifier/ZoomRegion/zoomer0",
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// "/org/gnome/Magnifier/ZoomRegion/zoomer1", etc.
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let _zoomRegionInstanceCount = 0;
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function ShellMagnifier() {
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this._init();
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}
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ShellMagnifier.prototype = {
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_init: function() {
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this._zoomers = {};
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DBus.session.exportObject(MAG_SERVICE_PATH, this);
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},
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/**
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* setActive:
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* @activate: Boolean to activate or de-activate the magnifier.
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*/
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setActive: function(activate) {
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Main.magnifier.setActive(activate);
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},
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/**
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* isActive:
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* @return Whether the magnifier is active (boolean).
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*/
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isActive: function() {
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return Main.magnifier.isActive();
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},
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/**
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* showCursor:
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* Show the system mouse pointer.
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*/
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showCursor: function() {
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Main.magnifier.showSystemCursor();
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},
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/**
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* hideCursor:
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* Hide the system mouse pointer.
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*/
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hideCursor: function() {
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Main.magnifier.hideSystemCursor();
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},
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/**
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* createZoomRegion:
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* Create a new ZoomRegion and return its object path.
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* @xMagFactor: The power to set horizontal magnification of the
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* ZoomRegion. A value of 1.0 means no magnification. A
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* value of 2.0 doubles the size.
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* @yMagFactor: The power to set the vertical magnification of the
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* ZoomRegion.
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* @roi Array of integers defining the region of the
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* screen/desktop to magnify. The array has the form
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* [x, y, width, height].
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* @viewPort Array of integers, [ x, y, width, height ] that defines
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* the position of the ZoomRegion on screen.
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* @return The newly created ZoomRegion.
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*/
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createZoomRegion: function(xMagFactor, yMagFactor, roi, viewPort) {
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let ROI = { x: roi[0], y: roi[1], width: roi[2], height: roi[3] };
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let viewBox = { x: viewPort[0], y: viewPort[1], width: viewPort[2], height: viewPort[3] };
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let realZoomRegion = Main.magnifier.createZoomRegion(xMagFactor, yMagFactor, ROI, viewBox);
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let objectPath = ZOOM_SERVICE_PATH + "/zoomer" + _zoomRegionInstanceCount;
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_zoomRegionInstanceCount++;
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let zoomRegionProxy = new ShellMagnifierZoomRegion(objectPath, realZoomRegion);
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let proxyAndZoomRegion = {};
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proxyAndZoomRegion.proxy = zoomRegionProxy;
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proxyAndZoomRegion.zoomRegion = realZoomRegion;
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this._zoomers[objectPath] = proxyAndZoomRegion;
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return objectPath;
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},
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/**
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* addZoomRegion:
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* Append the given ZoomRegion to the magnifier's list of ZoomRegions.
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* @zoomerObjectPath: The object path for the zoom region proxy.
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*/
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addZoomRegion: function(zoomerObjectPath) {
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let proxyAndZoomRegion = this._zoomers[zoomerObjectPath];
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if (proxyAndZoomRegion && proxyAndZoomRegion.zoomRegion) {
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Main.magnifier.addZoomRegion(proxyAndZoomRegion.zoomRegion);
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return true;
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}
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else
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return false;
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},
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/**
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* getZoomRegions:
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* Return a list of ZoomRegion object paths for this Magnifier.
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* @return: The Magnifier's zoom region list as an array of DBus object
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* paths.
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*/
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getZoomRegions: function() {
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// There may be more ZoomRegions in the magnifier itself than have
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// been added through dbus. Make sure all of them are associated with
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// an object path and proxy.
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let zoomRegions = Main.magnifier.getZoomRegions();
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let objectPaths = [];
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let thoseZoomers = this._zoomers;
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zoomRegions.forEach (function(aZoomRegion, index, array) {
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let found = false;
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for (let objectPath in thoseZoomers) {
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let proxyAndZoomRegion = thoseZoomers[objectPath];
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if (proxyAndZoomRegion.zoomRegion === aZoomRegion) {
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objectPaths.push(objectPath);
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found = true;
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break;
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}
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}
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if (!found) {
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// Got a ZoomRegion with no DBus proxy, make one.
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let newPath = ZOOM_SERVICE_PATH + "/zoomer" + _zoomRegionInstanceCount;
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_zoomRegionInstanceCount++;
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let zoomRegionProxy = new ShellMagnifierZoomRegion(newPath, aZoomRegion);
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let proxyAndZoomer = {};
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proxyAndZoomer.proxy = zoomRegionProxy;
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proxyAndZoomer.zoomRegion = aZoomRegion;
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thoseZoomers[newPath] = proxyAndZoomer;
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objectPaths.push(newPath);
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}
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});
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return objectPaths;
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},
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/**
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* clearAllZoomRegions:
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* Remove all the zoom regions from this Magnfier's ZoomRegion list.
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*/
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clearAllZoomRegions: function() {
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Main.magnifier.clearAllZoomRegions();
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for (let objectPath in this._zoomers) {
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let proxyAndZoomer = this._zoomers[objectPath];
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proxyAndZoomer.proxy = null;
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proxyAndZoomer.zoomRegion = null;
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delete this._zoomers[objectPath];
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DBus.session.unexportObject(proxyAndZoomer);
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}
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this._zoomers = {};
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},
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/**
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* fullScreenCapable:
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* Consult if the Magnifier can magnify in full-screen mode.
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* @return Always return true.
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*/
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fullScreenCapable: function() {
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return true;
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},
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/**
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* setCrosswireSize:
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* Set the crosswire size of all ZoomRegions.
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* @size: The thickness of each line in the cross wire.
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*/
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setCrosswireSize: function(size) {
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Main.magnifier.setCrosshairsThickness(size);
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},
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/**
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* getCrosswireSize:
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* Get the crosswire size of all ZoomRegions.
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* @return: The thickness of each line in the cross wire.
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*/
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getCrosswireSize: function() {
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return Main.magnifier.getCrosshairsThickness();
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},
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/**
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* setCrosswireLength:
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* Set the crosswire length of all zoom-regions..
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* @size: The length of each line in the cross wire.
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*/
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setCrosswireLength: function(length) {
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Main.magnifier.setCrosshairsLength(length);
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},
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/**
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* setCrosswireSize:
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* Set the crosswire size of all zoom-regions.
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* @size: The thickness of each line in the cross wire.
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*/
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getCrosswireLength: function() {
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return Main.magnifier.getCrosshairsLength();
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},
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/**
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* setCrosswireClip:
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* Set if the crosswire will be clipped by the cursor image..
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* @clip: Flag to indicate whether to clip the crosswire.
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*/
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setCrosswireClip: function(clip) {
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Main.magnifier.setCrosshairsClip(clip);
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},
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/**
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* getCrosswireClip:
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* Get the crosswire clip value.
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* @return: Whether the crosswire is clipped by the cursor image.
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*/
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getCrosswireClip: function() {
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return Main.magnifier.getCrosshairsClip();
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},
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/**
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* setCrosswireColor:
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* Set the crosswire color of all ZoomRegions.
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* @color: Unsigned int of the form rrggbbaa.
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*/
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setCrosswireColor: function(color) {
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Main.magnifier.setCrosshairsColor('#' + color.toString(16));
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},
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/**
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* getCrosswireClip:
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* Get the crosswire color of all ZoomRegions.
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* @return: The crosswire color as an unsigned int in the form rrggbbaa.
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*/
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getCrosswireColor: function() {
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let colorString = Main.magnifier.getCrosshairsColor();
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// Drop the leading '#'.
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return parseInt(colorString.slice(1), 16);
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}
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}
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/**
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* ShellMagnifierZoomRegion:
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* Object that implements the DBus ZoomRegion interface.
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* @zoomerObjectPath: String that is the path to a DBus ZoomRegion.
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* @zoomRegion: The actual zoom region associated with the object path.
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*/
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function ShellMagnifierZoomRegion(zoomerObjectPath, zoomRegion) {
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this._init(zoomerObjectPath, zoomRegion);
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}
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ShellMagnifierZoomRegion.prototype = {
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_init: function(zoomerObjectPath, zoomRegion) {
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this._zoomRegion = zoomRegion;
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DBus.session.proxifyObject(this, ZOOM_SERVICE_NAME, zoomerObjectPath);
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DBus.session.exportObject(zoomerObjectPath, this);
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},
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/**
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* setMagFactor:
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* @xMagFactor: The power to set the horizontal magnification factor to
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* of the magnified view. A value of 1.0 means no
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* magnification. A value of 2.0 doubles the size.
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* @yMagFactor: The power to set the vertical magnification factor to
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* of the magnified view.
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*/
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setMagFactor: function(xMagFactor, yMagFactor) {
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this._zoomRegion.setMagFactor(xMagFactor, yMagFactor);
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},
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/**
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* getMagFactor:
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* @return an array, [xMagFactor, yMagFactor], containing the horizontal
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* and vertical magnification powers. A value of 1.0 means no
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* magnification. A value of 2.0 means the contents are doubled
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* in size, and so on.
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*/
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getMagFactor: function() {
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return this._zoomRegion.getMagFactor();
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},
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/**
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* setRoi:
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* Sets the "region of interest" that the ZoomRegion is magnifying.
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* @roi Array, [x, y, width, height], defining the region of the screen to
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* magnify. The values are in screen (unmagnified) coordinate
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* space.
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*/
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setRoi: function(roi) {
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let roiObject = { x: roi[0], y: roi[1], width: roi[2], height: roi[3] };
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this._zoomRegion.setROI(roiObject);
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},
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/**
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* getRoi:
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* Retrieves the "region of interest" -- the rectangular bounds of that part
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* of the desktop that the magnified view is showing (x, y, width, height).
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* The bounds are given in non-magnified coordinates.
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* @return an array, [x, y, width, height], representing the bounding
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* rectangle of what is shown in the magnified view.
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*/
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getRoi: function() {
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return this._zoomRegion.getROI();
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},
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/**
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* Set the "region of interest" by centering the given screen coordinate
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* within the zoom region.
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* @x The x-coord of the point to place at the center of the zoom region.
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* @y The y-coord.
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* @return Whether the shift was successful (for GS-mag, this is always
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* true).
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*/
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shiftContentsTo: function(x, y) {
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this._zoomRegion.scrollContentsTo(x, y);
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return true;
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},
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/**
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* moveResize
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* Sets the position and size of the ZoomRegion on screen.
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* @viewPort Array, [x, y, width, height], defining the position and size
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|
|
* on screen to place the zoom region.
|
||
|
|
*/
|
||
|
|
moveResize: function(viewPort) {
|
||
|
|
let viewRect = { x: viewPort[0], y: viewPort[1], width: viewPort[2], height: viewPort[3] };
|
||
|
|
this._zoomRegion.setViewPort(viewRect);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
DBus.conformExport(ShellMagnifier.prototype, MagnifierIface);
|
||
|
|
DBus.conformExport(ShellMagnifierZoomRegion.prototype, ZoomRegionIface);
|