svgedit/editor/extensions/ext-overview_window.js

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/* eslint-disable no-var */
/* globals svgEditor, svgedit, $ */
/*
* ext-overview_window.js
*
* Licensed under the MIT License
*
* Copyright(c) 2013 James Sacksteder
*
*/
var overviewWindowGlobals = {};
svgEditor.addExtension('overview_window', function () {
'use strict';
// Disabled in Chrome 48-, see https://github.com/SVG-Edit/svgedit/issues/26 and
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// https://code.google.com/p/chromium/issues/detail?id=565120.
if (svgedit.browser.isChrome()) {
var verIndex = navigator.userAgent.indexOf('Chrome/') + 7;
var chromeVersion = parseInt(navigator.userAgent.substring(verIndex), 10);
if (chromeVersion < 49) {
return;
}
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}
// Define and insert the base html element.
var propsWindowHtml =
'<div id="overview_window_content_pane" style="width:100%; word-wrap:break-word; display:inline-block; margin-top:20px;">' +
'<div id="overview_window_content" style="position:relative; left:12px; top:0px;">' +
'<div style="background-color:#A0A0A0; display:inline-block; overflow:visible;">' +
'<svg id="overviewMiniView" width="150" height="100" x="0" y="0" viewBox="0 0 4800 3600" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">' +
'<use x="0" y="0" xlink:href="#svgroot"> </use>' +
'</svg>' +
'<div id="overview_window_view_box" style="min-width:50px; min-height:50px; position:absolute; top:30px; left:30px; z-index:5; background-color:rgba(255,0,102,0.3);">' +
'</div>' +
'</div>' +
'</div>' +
'</div>';
$('#sidepanels').append(propsWindowHtml);
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// Define dynamic animation of the view box.
var updateViewBox = function () {
var portHeight = parseFloat($('#workarea').css('height'));
var portWidth = parseFloat($('#workarea').css('width'));
var portX = $('#workarea').scrollLeft();
var portY = $('#workarea').scrollTop();
var windowWidth = parseFloat($('#svgcanvas').css('width'));
var windowHeight = parseFloat($('#svgcanvas').css('height'));
var overviewWidth = $('#overviewMiniView').attr('width');
var overviewHeight = $('#overviewMiniView').attr('height');
var viewBoxX = portX / windowWidth * overviewWidth;
var viewBoxY = portY / windowHeight * overviewHeight;
var viewBoxWidth = portWidth / windowWidth * overviewWidth;
var viewBoxHeight = portHeight / windowHeight * overviewHeight;
$('#overview_window_view_box').css('min-width', viewBoxWidth + 'px');
$('#overview_window_view_box').css('min-height', viewBoxHeight + 'px');
$('#overview_window_view_box').css('top', viewBoxY + 'px');
$('#overview_window_view_box').css('left', viewBoxX + 'px');
};
$('#workarea').scroll(function () {
if (!(overviewWindowGlobals.viewBoxDragging)) {
updateViewBox();
}
});
$('#workarea').resize(updateViewBox);
updateViewBox();
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// Compensate for changes in zoom and canvas size.
var updateViewDimensions = function () {
var viewWidth = $('#svgroot').attr('width');
var viewHeight = $('#svgroot').attr('height');
var viewX = 640;
var viewY = 480;
if (svgedit.browser.isIE()) {
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// This has only been tested with Firefox 10 and IE 9 (without chrome frame).
// I am not sure if if is Firefox or IE that is being non compliant here.
// Either way the one that is noncompliant may become more compliant later.
// TAG:HACK
// TAG:VERSION_DEPENDENT
// TAG:BROWSER_SNIFFING
viewX = 0;
viewY = 0;
}
var svgWidthOld = $('#overviewMiniView').attr('width');
var svgHeightNew = viewHeight / viewWidth * svgWidthOld;
$('#overviewMiniView').attr('viewBox', viewX + ' ' + viewY + ' ' + viewWidth + ' ' + viewHeight);
$('#overviewMiniView').attr('height', svgHeightNew);
updateViewBox();
};
updateViewDimensions();
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// Set up the overview window as a controller for the view port.
overviewWindowGlobals.viewBoxDragging = false;
var updateViewPortFromViewBox = function () {
var windowWidth = parseFloat($('#svgcanvas').css('width'));
var windowHeight = parseFloat($('#svgcanvas').css('height'));
var overviewWidth = $('#overviewMiniView').attr('width');
var overviewHeight = $('#overviewMiniView').attr('height');
var viewBoxX = parseFloat($('#overview_window_view_box').css('left'));
var viewBoxY = parseFloat($('#overview_window_view_box').css('top'));
var portX = viewBoxX / overviewWidth * windowWidth;
var portY = viewBoxY / overviewHeight * windowHeight;
$('#workarea').scrollLeft(portX);
$('#workarea').scrollTop(portY);
};
$('#overview_window_view_box').draggable({
containment: 'parent',
drag: updateViewPortFromViewBox,
start: function () { overviewWindowGlobals.viewBoxDragging = true; },
stop: function () { overviewWindowGlobals.viewBoxDragging = false; }
});
$('#overviewMiniView').click(function (evt) {
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// Firefox doesn't support evt.offsetX and evt.offsetY.
var mouseX = (evt.offsetX || evt.originalEvent.layerX);
var mouseY = (evt.offsetY || evt.originalEvent.layerY);
var overviewWidth = $('#overviewMiniView').attr('width');
var overviewHeight = $('#overviewMiniView').attr('height');
var viewBoxWidth = parseFloat($('#overview_window_view_box').css('min-width'));
var viewBoxHeight = parseFloat($('#overview_window_view_box').css('min-height'));
var viewBoxX = mouseX - 0.5 * viewBoxWidth;
var viewBoxY = mouseY - 0.5 * viewBoxHeight;
// deal with constraints
if (viewBoxX < 0) {
viewBoxX = 0;
}
if (viewBoxY < 0) {
viewBoxY = 0;
}
if (viewBoxX + viewBoxWidth > overviewWidth) {
viewBoxX = overviewWidth - viewBoxWidth;
}
if (viewBoxY + viewBoxHeight > overviewHeight) {
viewBoxY = overviewHeight - viewBoxHeight;
}
$('#overview_window_view_box').css('top', viewBoxY + 'px');
$('#overview_window_view_box').css('left', viewBoxX + 'px');
updateViewPortFromViewBox();
});
return {
name: 'overview window',
canvasUpdated: updateViewDimensions,
workareaResized: updateViewBox
};
});