--- /dev/null
+/*
+ * extensions/double-click.js
+ *
+ * Part of the jsMath package for mathematics on the web.
+ *
+ * This file allows users to double click on typeset mathematics
+ * to view the TeX source for the given expression. It will be loaded
+ * automatically when needed, or can be loaded by
+ *
+ * jsMath.Extension.Require('double-click');
+ *
+ * ---------------------------------------------------------------------
+ *
+ * Copyright 2005-2008 by Davide P. Cervone
+ *
+ * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/********************************************************************/
+
+if (jsMath.Click && jsMath.Click.styles)
+ {jsMath.Click.oldStyles = jsMath.Click.styles}
+
+jsMath.Add(jsMath.Click,{
+
+ dragging: 0,
+
+ styles: {
+ // Floating windows for displaying TeX source
+ '#jsMath_float': {
+ position: 'absolute', top: '0px', left: '0px', 'z-index': '101',
+ 'max-width': '80%', width: 'auto', height: 'auto',
+ padding: '0px', margin: '0px', 'font-size': '100%'
+ },
+ '#jsMath_float .drag': {
+ 'background-color': '#DDDDDD',
+ border: 'outset 1px', padding: '0px', margin: '0px',
+ width: 'auto', height: '12px', 'font-size': '1px'
+ },
+ '#jsMath_float .close': {
+ 'background-color': '#E6E6E6',
+ border: 'inset 1px', margin: '1px 2px', padding: '0px',
+ width: '8px', height: '8px'
+ },
+ '#jsMath_float .source': {
+ 'background-color': '#E2E2E2',
+ border: 'outset 1px', margin: '0px', padding: '8px 15px',
+ width: 'auto', height: 'auto',
+ 'font-family': 'courier, fixed', 'font-size': '90%'
+ }
+ },
+
+ /*
+ * Create the hidden DIV used for the tex source window
+ */
+ Init: function () {
+ if (this.oldStyles) {jsMath.Insert(this.styles,this.oldStyles)}
+ jsMath.Setup.Styles(this.styles);
+ this.source = jsMath.Setup.DIV("float",{display:'none'});
+ this.source.innerHTML =
+ '<div class="drag"><div class="close"></div></div>'
+ + '<div class="source"><span></span></div>';
+ this.drag = this.source.firstChild;
+ this.tex = this.drag.nextSibling.firstChild;
+ this.drag.firstChild.onclick = jsMath.Click.CloseSource;
+ this.drag.onmousedown = jsMath.Click.StartDragging;
+ this.drag.ondragstart = jsMath.Click.False;
+ this.drag.onselectstart = jsMath.Click.False;
+ this.source.onclick = jsMath.Click.CheckClose;
+ },
+ False: function () {return false},
+
+ /*
+ * Handle a double-click on an equation
+ */
+ DblClick: function (data) {
+ var event = data[0]; var TeX = data[1];
+ var event = jsMath.Click.Event(event);
+
+ var source = jsMath.Click.source
+ var tex = jsMath.Click.tex;
+
+ source.style.visibility = 'hidden';
+ source.style.display = ''; source.style.width = '';
+ source.style.left = ''; source.style.top = '';
+ tex.innerHTML = '';
+
+ TeX = TeX.replace(/^\s+|\s+$/g,'');
+ TeX = TeX.replace(/&/g,'&');
+ TeX = TeX.replace(/</g,'<');
+ TeX = TeX.replace(/>/g,'>');
+ TeX = TeX.replace(/\n/g,'<br/>');
+ tex.innerHTML = TeX;
+
+ var h = source.offsetHeight; var w;
+ if (jsMath.Browser.msieDivWidthBug) {
+ tex.className = 'source'; // Work around MSIE bug where
+ w = tex.offsetWidth + 5; // DIV's don't collapse to
+ tex.className = ''; // their natural widths
+ } else {
+ w = source.offsetWidth;
+ }
+ w = Math.max(50,Math.min(w,.8*event.W,event.W-40));
+ var x = Math.floor(event.x-w/2); var y = Math.floor(event.y-h/2);
+ x = event.X + Math.max(Math.min(x,event.W-w-20),20);
+ y = event.Y + Math.max(Math.min(y,event.H-h-5),5);
+
+ source.style.left = x+'px'; source.style.top = y+'px';
+ source.style.width = w+'px';
+ source.style.visibility = '';
+ jsMath.Click.left = x + event.X; jsMath.Click.top = y + event.Y;
+ jsMath.Click.w = w; jsMath.Click.h = source.offsetHeight;
+
+ jsMath.Click.DeselectText(x,y);
+ return false;
+ },
+
+ /*
+ * Get window width, height, and offsets plus
+ * position of pointer relative to the window
+ */
+ Event: function (event) {
+ var W = jsMath.window.innerWidth || jsMath.document.body.clientWidth;
+ var H = jsMath.window.innerHeight || jsMath.document.body.clientHeight;
+ var X = jsMath.window.pageXOffset; var Y = jsMath.window.pageYOffset;
+ if (X == null) {
+ X = jsMath.document.body.clientLeft;
+ Y = jsMath.document.body.clientTop;
+ }
+ var x = event.pageX; var y = event.pageY;
+ if (x == null) {
+ x = event.clientX; y = event.clientY;
+ if (jsMath.browser == 'MSIE' && jsMath.document.compatMode == 'CSS1Compat') {
+ X = jsMath.document.documentElement.scrollLeft;
+ Y = jsMath.document.documentElement.scrollTop;
+ W = jsMath.document.documentElement.clientWidth;
+ H = jsMath.document.documentElement.clientHeight;
+ } else {
+ X = jsMath.document.body.scrollLeft;
+ Y = jsMath.document.body.scrollTop;
+ }
+ } else {x -= X; y -= Y}
+
+ return {x: x, y: y, W: W, H: H, X: X, Y: Y};
+ },
+
+ /*
+ * Unselect whatever text is selected (since double-clicking
+ * usually selects something)
+ */
+ DeselectText: function (x,y) {
+ if (jsMath.window.getSelection && jsMath.window.getSelection().removeAllRanges)
+ {jsMath.window.getSelection().removeAllRanges()}
+ else if (jsMath.document.getSelection && jsMath.document.getSelection().removeAllRanges)
+ {jsMath.document.getSelection().removeAllRanges()}
+ else if (jsMath.document.selection && jsMath.document.selection.empty)
+ {jsMath.document.selection.empty()}
+ else {
+ /* Hack to deselect the text in Opera and Safari */
+ if (jsMath.browser == 'MSIE') return; // don't try it if MISE on Mac
+ jsMath.hiddenTop.innerHTML =
+ '<textarea style="visibility:hidden" rows="1" cols="1">a</textarea>';
+ jsMath.hiddenTop.firstChild.style.position = 'absolute';
+ jsMath.hiddenTop.firstChild.style.left = x+'px';
+ jsMath.hiddenTop.firstChild.style.top = y+'px';
+ setTimeout(jsMath.Click.SelectHidden,1);
+ }
+ },
+ SelectHidden: function () {
+ jsMath.hiddenTop.firstChild.focus();
+ jsMath.hiddenTop.firstChild.select();
+ jsMath.hiddenTop.innerHTML = '';
+ },
+
+ /*
+ * Close the TeX source window
+ */
+ CloseSource: function () {
+ jsMath.Click.tex.innerHTML = '';
+ jsMath.Click.source.style.display = 'none';
+ jsMath.Click.source.style.visibility = 'hidden';
+ jsMath.Click.StopDragging();
+ return false;
+ },
+ CheckClose: function (event) {
+ if (!event) {event = jsMath.window.event}
+ if (event.altKey) {jsMath.Click.CloseSource(); return false}
+ },
+
+ /*
+ * Set up for dragging the source panel
+ */
+ StartDragging: function (event) {
+ if (!event) {event = jsMath.window.event}
+ if (jsMath.Click.dragging) {jsMath.Click.StopDragging(event)}
+ var event = jsMath.Click.Event(event);
+ jsMath.Click.dragging = 1;
+ jsMath.Click.x = event.x + 2*event.X - jsMath.Click.left;
+ jsMath.Click.y = event.y + 2*event.Y - jsMath.Click.top;
+ jsMath.Click.oldonmousemove = jsMath.document.onmousemove;
+ jsMath.Click.oldonmouseup = jsMath.document.onmouseup;
+ jsMath.document.onmousemove = jsMath.Click.DragSource;
+ jsMath.document.onmouseup = jsMath.Click.StopDragging;
+ return false;
+ },
+
+ /*
+ * Stop dragging the source window
+ */
+ StopDragging: function (event) {
+ if (jsMath.Click.dragging) {
+ jsMath.document.onmousemove = jsMath.Click.oldonmousemove;
+ jsMath.document.onmouseup = jsMath.Click.oldonmouseup;
+ jsMath.Click.oldonmousemove = null;
+ jsMath.Click.oldonmouseup = null;
+ jsMath.Click.dragging = 0;
+ }
+ return false;
+ },
+
+ /*
+ * Move the source window (but stay within the browser window)
+ */
+ DragSource: function (event) {
+ if (!event) {event = jsMath.window.event}
+ if (jsMath.Browser.buttonCheck && !event.button) {return jsMath.Click.StopDragging(event)}
+ event = jsMath.Click.Event(event);
+ var x = event.x + event.X - jsMath.Click.x;
+ var y = event.y + event.Y - jsMath.Click.y;
+ x = Math.max(event.X,Math.min(event.W+event.X-jsMath.Click.w,x));
+ y = Math.max(event.Y,Math.min(event.H+event.Y-jsMath.Click.h,y));
+ jsMath.Click.source.style.left = x + 'px';
+ jsMath.Click.source.style.top = y + 'px';
+ jsMath.Click.left = x + event.X; jsMath.Click.top = y + event.Y;
+ return false;
+ }
+
+});
+
+jsMath.Click.Init();