/* Copyright (c) 2007, 2008 Alessandro Warth Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ // This code was adapted from Takashi Yamamiya's Javascript Workspace, // which you can visit at http://metatoys.org/propella/js/workspace.js // --------------------------------------------------------------------------------------------------------------------------- // INSTRUCTIONS: a client page must (1) include something along these lines: /* ... ... */ // and (2) define its own translateCode function function translateCode(s) { //throw { errorPos: 0 } return s } // --------------------------------------------------------------------------------------------------------------------------- /* event handler for short cut key */ function onShortCutKey(evt) { evt = evt ? evt : window.event; if (!evt) return undefined; if (!(evt.altKey || evt.ctrlKey || evt.metaKey)) return true; var charCode = evt.charCode ? evt.charCode : evt.keyCode try { var handledIt = true switch (charCode) { case 68: doIt(); break case 80: printIt(); break case 83: saveIt(); break default: handledIt = false; return true } } finally { if (handledIt) { if (evt.preventDefault) { evt.preventDefault() evt.stopPropagation() } else { evt.returnValue = false evt.cancelBubble = true } } } return false } function printIt() { var result = evalSelection() if (!result) return var editor = result.source.editor, end = result.source.end, head = editor.value.substring(0, end), tail = editor.value.substring(end), oldScrollTop = editor.scrollTop editor.value = head + result.result + tail; editor.scrollTop = oldScrollTop setCaretSelection(editor, end, head.length + result.result.length) } function doIt() { var result = evalSelection() if (result) result.source.editor.focus() } function saveIt() { } /* Get selection of textarea */ function getCaretSelection(field) { field.focus(); var result = { start: 0, end: 0 }; // IE support based on http://groups.drupal.org/node/1210 if(typeof $('workspaceForm').source.selectionEnd == "undefined") { var range = document.selection.createRange(), rangeCopy = range.duplicate() rangeCopy.moveToElementText(field) rangeCopy.setEndPoint( 'EndToEnd', range ) result.start = rangeCopy.text.length - range.text.length result.end = result.start + range.text.length } else { result.start = field.selectionStart result.end = field.selectionEnd } return result } /* Set selection of textarea */ function setCaretSelection(field, start, end) { field.focus() // IE if(typeof $('workspaceForm').source.selectionEnd == "undefined") { var range = field.createTextRange() range.expand("textedit") var dStart = start - (field.value.substring(0, start).split("\n").length - 1), dEnd = end - field.value.length + field.value.substring(end + 1).split("\n").length - 1 range.moveStart("character", dStart) range.moveEnd("character", dEnd) range.select() } else { field.selectionStart = start field.selectionEnd = end } } /* Get expression from textarea */ function getSource() { var editor = $('workspaceForm').source, selection = getCaretSelection(editor), start = selection.start, end = selection.end, text = editor.value.substring(start, end) if (start == end) { var alltext = editor.value, index = 0 if (start > 0 && alltext.charAt(start) == "\n") start-- while (start > 0 && alltext.charAt(start) != "\n") start-- if (alltext.charAt(start) == "\n") start++ while (end < alltext.length && alltext.charAt(end) != "\r" && alltext.charAt(end) != "\n") end++ text = alltext.substring(start, end); setCaretSelection(editor, start, end); } return { editor: editor, start: start, end: end, text: text } } function evalSelection() { var source = getSource() try { $('workspaceForm').translation.value = translateCode(source.text) } catch (e) { if (e.errorPos != undefined) { var errorPos = source.start + e.errorPos errorMsg = " Parse error ->", oldScrollTop = $('workspaceForm').source.scrollTop $('workspaceForm').source.value = $('workspaceForm').source.value.substring(0, errorPos) + errorMsg + $('workspaceForm').source.value.substring(errorPos, $('workspaceForm').source.value.length) $('workspaceForm').source.scrollTop = oldScrollTop setCaretSelection($('workspaceForm').source, errorPos, errorPos + errorMsg.length) } return undefined } try { return { source: source, result: " " + eval($('workspaceForm').translation.value) } } catch (e) { alert("Oops!\n\n" + e) throw e } } Transcript = { show: function(x) { $('workspaceForm').transcript.value = $('workspaceForm').transcript.value + x + "\n" $('workspaceForm').transcript.scrollTop = $('workspaceForm').transcript.scrollHeight }, clear: function() { $('workspaceForm').transcript.value = "" } }