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