/*
@licstart The following is the entire license notice for the
JavaScript code in this file.
Copyright (C) 1997-2017 by Dimitri van Heesch
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
@licend The above is the entire license notice
for the JavaScript code in this file
*/
/**
* The code below is based on SVGPan Library 1.2 and was modified for doxygen
* to support both zooming and panning via the mouse and via embedded bottons.
*
* This code is licensed under the following BSD license:
*
* Copyright 2009-2010 Andrea Leofreddi <a.leofreddi@itcharm.com>. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY Andrea Leofreddi ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL Andrea Leofreddi OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of Andrea Leofreddi.
*/
var root = document.documentElement;
var state = 'none';
var stateOrigin;
var stateTf = root.createSVGMatrix();
var cursorGrab = ' url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA4AAAAOCAMAAAAolt3jAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAAlQTFRFAAAA////////c3ilYwAAAAN0Uk5T//8A18oNQQAAAD1JREFUeNp0zlEKACAIA9Bt9z90bZBZkQj29qFBEuBOzQHSnWTTyckEfqUuZgFvslH4ch3qLCO/Kr8cAgwATw4Ax6XRCcoAAAAASUVORK5CYII="), move';
var zoomSteps = 10;
var zoomInFactor;
var zoomOutFactor;
var windowWidth;
var windowHeight;
var svgDoc;
var minZoom;
var maxZoom;
if (!window) window=this;
/**
* Show the graph in the middle of the view, scaled to fit
*/
function show()
{
if (window.innerHeight) // Firefox
{
windowWidth = window.innerWidth;
windowHeight = window.innerHeight;
}
else if (document.documentElement.clientWidth) // Chrome/Safari
{
windowWidth = document.documentElement.clientWidth
windowHeight = document.documentElement.clientHeight
}
if (!windowWidth || !windowHeight) // failsafe
{
windowWidth = 800;
windowHeight = 600;
}
minZoom = Math.min(Math.min(viewHeight,windowHeight)/viewHeight,Math.min(viewWidth,windowWidth)/viewWidth);
maxZoom = minZoom+1.5;
zoomInFactor = Math.pow(maxZoom/minZoom,1.0/zoomSteps);
zoomOutFactor = 1.0/zoomInFactor;
var g = svgDoc.getElementById('viewport');
try
{
var bb = g.getBBox(); // this can throw an exception if css { display: none }
var tx = (windowWidth-viewWidth*minZoom+8)/(2*minZoom);
var ty = viewHeight+(windowHeight-viewHeight*minZoom)/(2*minZoom);
var a = 'scale('+minZoom+') rotate(0) translate('+tx+' '+ty+')';
g.setAttribute('transform',a);
}
catch(e) {}
}
/**
* Register handlers
*/
function init(evt)
{
svgDoc = evt.target.ownerDocument;
try {
if (top.window && top.window.registerShow) { // register show function in html doc for dynamic sections
top.window.registerShow(sectionId,show);
}
} catch(e) {
// ugh, we are not allowed to talk to the parent; can happen with Chrome when viewing pages
// locally, since they treat every local page as having a different origin
}
show();
setAttributes(root, {
"onmousedown" : "handleMouseDown(evt)",
"onmousemove" : "handleMouseMove(evt)",
"onmouseup" : "handleMouseUp(evt)"
});
if (window.addEventListener)
{
if (navigator.userAgent.toLowerCase().indexOf('webkit') >= 0 ||
navigator.userAgent.toLowerCase().indexOf("opera") >= 0 ||
navigator.appVersion.indexOf("MSIE") != -1)
{
window.addEventListener('mousewheel', handleMouseWheel, false); // Chrome/Safari/IE9
}
else
{
window.addEventListener('DOMMouseScroll', handleMouseWheel, false); // Others
}
}
}
window.onresize=function()
{
if (svgDoc) { show(); }
}
/**
* Instance an SVGPoint object with given event coordinates.
*/
function getEventPoint(evt)
{
var p = root.createSVGPoint();
p.x = evt.clientX;
p.y = evt.clientY;
return p;
}
/**
* Sets the current transform matrix of an element.
*/
function setCTM(element, matrix)
{
var s = "matrix(" + matrix.a + "," + matrix.b + "," + matrix.c + "," + matrix.d + "," + matrix.e + "," + matrix.f + ")";
element.setAttribute("transform", s);
}
/**
* Sets attributes of an element.
*/
function setAttributes(element, attributes)
{
for (i in attributes)
element.setAttributeNS(null, i, attributes[i]);
}
function doZoom(g,point,zoomFactor)
{
var p = point.matrixTransform(g.getCTM().inverse());
var k = root.createSVGMatrix().translate(p.x, p.y).scale(zoomFactor).translate(-p.x, -p.y);
var n = g.getCTM().multiply(k);
var s = Math.max(n.a,n.d);
if (s>maxZoom) n=n.translate(p.x,p.y).scale(maxZoom/s).translate(-p.x,-p.y);
else if (s<minZoom) n=n.translate(p.x,p.y).scale(minZoom/s).translate(-p.x,-p.y);
setCTM(g, n);
stateTf = stateTf.multiply(n.inverse());
}
/**
* Handle mouse move event.
*/
function handleMouseWheel(evt)
{
if (!evt) evt = window.evt;
if (!evt.shiftKey) return; // only zoom when shift is pressed
if (evt.preventDefault) evt.preventDefault();
evt.returnValue = false;
if (state!='pan')
{
var delta;
if (evt.wheelDelta)
{
delta = evt.wheelDelta / 7200; // Opera/Chrome/IE9/Safari
}
else
{
delta = evt.detail / -180; // Mozilla
}
var svgDoc = evt.target.ownerDocument;
var g = svgDoc.getElementById("viewport");
var p = getEventPoint(evt);
doZoom(g,p,1+delta);
}
}
/**
* Handle mouse move event.
*/
function handleMouseMove(evt)
{
if(evt.preventDefault)
evt.preventDefault();
evt.returnValue = false;
var g = svgDoc.getElementById("viewport");
if (state == 'pan')
{
// Pan mode
var p = getEventPoint(evt).matrixTransform(stateTf);
setCTM(g,stateTf.inverse().translate(p.x - stateOrigin.x, p.y - stateOrigin.y));
}
}
/**
* Handle click event.
*/
function handleMouseDown(evt)
{
if(evt.preventDefault)
evt.preventDefault();
evt.returnValue = false;
var g = svgDoc.getElementById("viewport");
state = 'pan';
stateTf = g.getCTM().inverse();
stateOrigin = getEventPoint(evt).matrixTransform(stateTf);
g.style.cursor = cursorGrab;
}
/**
* Handle mouse button release event.
*/
function handleMouseUp(evt)
{
if (evt.preventDefault) evt.preventDefault();
evt.returnValue = false;
var g = svgDoc.getElementById("viewport");
g.style.cursor = "default";
// Quit pan mode
state = '';
}
/**
* Dumps a matrix to a string (useful for debug).
*/
function dumpMatrix(matrix)
{
var s = "[ " + matrix.a + ", " + matrix.c + ", " + matrix.e + "\n " + matrix.b + ", " + matrix.d + ", " + matrix.f + "\n 0, 0, 1 ]";
return s;
}
/**
* Handler for pan buttons
*/
function handlePan(x,y)
{
var g = svgDoc.getElementById("viewport");
setCTM(g,g.getCTM().translate(x*20/minZoom,y*20/minZoom));
}
/**
* Handle reset button
*/
function handleReset()
{
show();
}
/**
* Handler for zoom buttons
*/
function handleZoom(evt,direction)
{
var g = svgDoc.getElementById("viewport");
var factor = direction=='in' ? zoomInFactor : zoomOutFactor;
var m = g.getCTM();
var p = root.createSVGPoint();
p.x = windowWidth/2;
p.y = windowHeight/2;
doZoom(g,p,factor);
}
function serializeXmlNode(xmlNode)
{
if (typeof window.XMLSerializer != "undefined") {
return (new window.XMLSerializer()).serializeToString(xmlNode);
} else if (typeof xmlNode.xml != "undefined") {
return xmlNode.xml;
}
return "";
}
/**
* Handler for print function
*/
function handlePrint(evt)
{
evt.returnValue = false;
var g = svgDoc.getElementById("graph");
var xs = serializeXmlNode(g);
try {
var w = window.open('about:blank','_blank','width='+windowWidth+',height='+windowHeight+
',toolbar=0,status=0,menubar=0,scrollbars=0,resizable=0,location=0,directories=0');
var d = w.document;
d.write('<html xmlns="http://www.w3.org/1999/xhtml" '+
'xmlns:svg="http://www.w3.org/2000/svg" '+
'xmlns:xlink="http://www.w3.org/1999/xlink">');
d.write('<head><title>Print SVG</title></head>');
d.write('<body style="margin: 0px; padding: 0px;" onload="window.print();">');
d.write('<div id="svg" style="width:'+windowWidth+'px; height:'+windowHeight+'px;">'+xs+'</div>');
d.write('</body>');
d.write('</html>');
d.close();
} catch(e) {
alert('Failed to open popup window needed for printing!\n'+e.message);
}
}
/* @license-end */