647 lines
22 KiB
JavaScript
647 lines
22 KiB
JavaScript
/* jshint -W084, -W099 */
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define([
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'jquery',
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'underscore',
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'settings',
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'eventMgr',
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'prism-core',
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'crel',
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'libs/prism-markdown'
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], function ($, _, settings, eventMgr, Prism, crel) {
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String.prototype.splice = function (i, remove, add) {
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remove = +remove || 0;
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add = add || '';
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return this.slice(0, i) + add + this.slice(i + remove);
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};
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var editor = {};
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var selectionStart = 0;
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var selectionEnd = 0;
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var scrollTop = 0;
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var inputElt;
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var previewElt;
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var pagedownEditor;
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var refreshPreviewLater = (function() {
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var elapsedTime = 0;
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var refreshPreview = function() {
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var startTime = Date.now();
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pagedownEditor.refreshPreview();
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elapsedTime = Date.now() - startTime;
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};
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if(settings.lazyRendering === true) {
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return _.debounce(refreshPreview, 500);
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}
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return function() {
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setTimeout(refreshPreview, elapsedTime < 2000 ? elapsedTime : 2000);
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};
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})();
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eventMgr.addListener('onPagedownConfigure', function(editor) {
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pagedownEditor = editor;
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});
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eventMgr.addListener('onSectionsCreated', function(newSectionList) {
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updateSectionList(newSectionList);
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highlightSections();
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if(fileChanged === true) {
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// Refresh preview synchronously
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pagedownEditor.refreshPreview();
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}
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else {
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refreshPreviewLater();
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}
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});
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var fileChanged = true;
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var fileDesc;
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eventMgr.addListener('onFileSelected', function(selectedFileDesc) {
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fileChanged = true;
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fileDesc = selectedFileDesc;
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});
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var previousTextContent;
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function onInputChange() {
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selectionStart = inputElt.selectionStart;
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selectionEnd = inputElt.selectionEnd;
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var currentTextContent = inputElt.textContent;
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if(!/\n$/.test(currentTextContent)) {
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currentTextContent += '\n';
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}
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if(fileChanged === false) {
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fileDesc.editorStart = selectionStart;
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fileDesc.editorEnd = selectionEnd;
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if(currentTextContent == previousTextContent) {
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return;
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}
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fileDesc.content = currentTextContent;
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eventMgr.onContentChanged(fileDesc);
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}
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else {
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eventMgr.onFileOpen(fileDesc);
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previewElt.scrollTop = fileDesc.previewScrollTop;
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selectionStart = fileDesc.editorStart;
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selectionEnd = fileDesc.editorEnd;
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scrollTop = fileDesc.editorScrollTop;
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inputElt.scrollTop = scrollTop;
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fileChanged = false;
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}
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previousTextContent = currentTextContent;
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}
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editor.init = function(elt1, elt2) {
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inputElt = elt1;
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previewElt = elt2;
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editor.contentElt = crel('div', {
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class: 'pre-content',
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contenteditable: true
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});
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editor.$contentElt = $(editor.contentElt);
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inputElt.appendChild(editor.contentElt);
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$(inputElt).scroll(function() {
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scrollTop = this.scrollTop;
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if(fileChanged === false) {
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fileDesc.editorScrollTop = scrollTop;
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}
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}).bind("keyup mouseup", onInputChange);
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$(previewElt).scroll(function() {
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if(fileChanged === false) {
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fileDesc.previewScrollTop = previewElt.scrollTop;
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}
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});
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inputElt.focus = function() {
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editor.$contentElt.focus();
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this.setSelectionRange(selectionStart, selectionEnd);
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inputElt.scrollTop = scrollTop;
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};
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editor.$contentElt.focus(function() {
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inputElt.focused = true;
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});
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editor.$contentElt.blur(function() {
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inputElt.focused = false;
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});
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Object.defineProperty(inputElt, 'value', {
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get: function () {
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return this.textContent;
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},
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set: function (value) {
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var currentValue = this.textContent;
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// Find the first modified char
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var startIndex = 0;
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var startIndexMax = Math.min(currentValue.length, value.length);
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while (startIndex < startIndexMax) {
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if (currentValue.charCodeAt(startIndex) !== value.charCodeAt(startIndex)) {
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break;
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}
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startIndex++;
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}
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// Find the last modified char
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var endIndex = 1;
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var endIndexMax = Math.min(currentValue.length - startIndex, value.length - startIndex);
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while (endIndex <= endIndexMax) {
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if (currentValue.charCodeAt(currentValue.length - endIndex) !== value.charCodeAt(value.length - endIndex)) {
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break;
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}
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endIndex++;
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}
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var replacementText = value.substring(startIndex, value.length - endIndex + 1);
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endIndex = currentValue.length - endIndex + 1;
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var range = createRange(inputElt, startIndex, endIndex);
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range.deleteContents();
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range.insertNode(document.createTextNode(replacementText));
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onInputChange();
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}
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});
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Object.defineProperty(inputElt, 'selectionStart', {
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get: function () {
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var selection = window.getSelection();
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if (selection.rangeCount) {
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var range = selection.getRangeAt(0),
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element = range.startContainer,
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container = element,
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offset = range.startOffset;
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if (!(this.compareDocumentPosition(element) & 0x10)) {
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return 0;
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}
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do {
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while (element = element.previousSibling) {
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if (element.textContent) {
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offset += element.textContent.length;
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}
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}
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element = container = container.parentNode;
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} while (element && element != this);
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return offset;
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} else {
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return 0;
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}
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},
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set: function (value) {
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inputElt.setSelectionRange(value, selectionEnd);
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},
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enumerable: true,
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configurable: true
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});
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Object.defineProperty(inputElt, 'selectionEnd', {
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get: function () {
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var selection = window.getSelection();
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if (selection.rangeCount) {
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return this.selectionStart + (selection.getRangeAt(0) + '').length;
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} else {
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return 0;
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}
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},
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set: function (value) {
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inputElt.setSelectionRange(selectionStart, value);
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},
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enumerable: true,
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configurable: true
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});
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function findOffset(root, ss) {
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if (!root) {
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return null;
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}
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var offset = 0,
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element = root,
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container;
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do {
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container = element;
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element = element.firstChild;
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if (element) {
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do {
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var len = element.textContent.length;
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if (offset <= ss && offset + len > ss) {
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break;
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}
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offset += len;
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} while (element = element.nextSibling);
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}
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if (!element) {
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// It's the container's lastChild
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break;
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}
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} while (element && element.hasChildNodes() && element.nodeType != 3);
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if (element) {
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return {
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element: element,
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offset: ss - offset
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};
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} else if (container) {
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element = container;
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while (element && element.lastChild) {
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element = element.lastChild;
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}
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if (element.nodeType === 3) {
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return {
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element: element,
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offset: element.textContent.length
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};
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} else {
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return {
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element: element,
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offset: 0
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};
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}
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}
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return {
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element: root,
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offset: 0,
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error: true
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};
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}
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function createRange(root, ss, se) {
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var range = document.createRange(),
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offset = findOffset(root, ss);
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range.setStart(offset.element, offset.offset);
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if (se && se != ss) {
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offset = findOffset(root, se);
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}
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range.setEnd(offset.element, offset.offset);
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return range;
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}
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inputElt.setSelectionRange = function (ss, se) {
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selectionStart = ss;
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selectionEnd = se;
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var range = createRange(editor.contentElt, ss, se);
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var selection = window.getSelection();
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selection.removeAllRanges();
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selection.addRange(range);
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};
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editor.$contentElt.on('keydown', function (evt) {
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var cmdOrCtrl = evt.metaKey || evt.ctrlKey;
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switch (evt.keyCode) {
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case 9: // Tab
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if (!cmdOrCtrl) {
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action('indent', {
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inverse: evt.shiftKey
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});
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evt.preventDefault();
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}
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break;
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case 13:
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action('newline');
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evt.preventDefault();
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break;
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case 191:
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if (cmdOrCtrl && !evt.altKey) {
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action('comment', {
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lang: this.id
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});
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evt.preventDefault();
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}
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break;
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}
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});
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editor.$contentElt.on('paste', function () {
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pagedownEditor.undoManager.setMode("paste");
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setTimeout(function() {
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onInputChange();
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}, 0);
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});
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editor.$contentElt.on('cut', function () {
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pagedownEditor.undoManager.setMode("cut");
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setTimeout(function() {
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onInputChange();
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}, 0);
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});
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var action = function (action, options) {
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options = options || {};
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var text = inputElt.value,
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ss = options.start || selectionStart,
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se = options.end || selectionEnd,
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state = {
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ss: ss,
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se: se,
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before: text.slice(0, ss),
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after: text.slice(se),
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selection: text.slice(ss, se)
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};
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actions[action](state, options);
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inputElt.value = state.before + state.selection + state.after;
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inputElt.setSelectionRange(state.ss, state.se);
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inputElt.dispatchEvent(new window.Event('input'));
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};
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var actions = {
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indent: function (state, options) {
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var lf = state.before.lastIndexOf('\n') + 1;
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pagedownEditor.undoManager.setMode("typing");
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if (options.inverse) {
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if (/\s/.test(state.before.charAt(lf))) {
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state.before = state.before.splice(lf, 1);
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state.ss--;
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state.se--;
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}
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state.selection = state.selection.replace(/^[ \t]/gm, '');
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} else if (state.selection) {
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state.before = state.before.splice(lf, 0, '\t');
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state.selection = state.selection.replace(/\r?\n(?=[\s\S])/g, '\n\t');
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state.ss++;
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state.se++;
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} else {
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state.before += '\t';
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state.ss++;
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state.se++;
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return;
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}
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state.se = state.ss + state.selection.length;
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},
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newline: function (state) {
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var lf = state.before.lastIndexOf('\n') + 1;
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var indent = (state.before.slice(lf).match(/^\s+/) || [''])[0];
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pagedownEditor.undoManager.setMode("newlines");
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state.before += '\n'// + indent;
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state.selection = '';
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state.ss += indent.length + 1;
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state.se = state.ss;
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},
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comment: function (state) {
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var textAction;
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var open = '<!--',
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close = '-->';
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var start = state.before.lastIndexOf(open),
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end = state.after.indexOf(close),
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closeBefore = state.before.lastIndexOf(close),
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openAfter = state.after.indexOf(start);
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pagedownEditor.undoManager.setMode("typing");
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if (start > -1 && end > -1 && (start > closeBefore || closeBefore === -1) && (end < openAfter || openAfter === -1)) {
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// Uncomment
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state.before = state.before.splice(start, open.length);
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state.after = state.after.splice(end, close.length);
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textAction = [{
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add: '',
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del: open,
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start: start
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}, {
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add: '',
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del: close,
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start: state.before.length + state.selection.length + end
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}];
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state.ss -= open.length;
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state.se -= open.length;
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return textAction;
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} else {
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// Comment
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if (state.selection) {
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// Comment selection
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state.selection = open + state.selection + close;
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textAction = [{
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add: open,
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del: '',
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start: state.ss
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}, {
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add: close,
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del: '',
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start: open.length + state.se
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}];
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} else {
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// Comment whole line
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start = state.before.lastIndexOf('\n') + 1;
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end = state.after.indexOf('\n');
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if (end === -1) {
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end = state.after.length;
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}
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while (/\s/.test(state.before.charAt(start))) {
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start++;
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}
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state.before = state.before.splice(start, 0, open);
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state.after = state.after.splice(end, 0, close);
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textAction = [{
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add: open,
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del: '',
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start: start
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}, {
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add: close,
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del: '',
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start: state.before.length + end
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}];
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}
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state.ss += open.length;
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state.se += open.length;
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return textAction;
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}
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}
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};
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};
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var sectionList = [];
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var sectionsToRemove = [];
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var modifiedSections = [];
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var insertBeforeSection;
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function updateSectionList(newSectionList) {
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modifiedSections = [];
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sectionsToRemove = [];
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insertBeforeSection = undefined;
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// Render everything if file changed
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if(fileChanged === true) {
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sectionsToRemove = sectionList;
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sectionList = newSectionList;
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modifiedSections = newSectionList;
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return;
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}
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// Find modified section starting from top
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var leftIndex = sectionList.length;
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_.some(sectionList, function(section, index) {
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if(index >= newSectionList.length || section.text != newSectionList[index].text) {
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leftIndex = index;
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return true;
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}
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});
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// Find modified section starting from bottom
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var rightIndex = -sectionList.length;
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_.some(sectionList.slice().reverse(), function(section, index) {
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var newSectionText = newSectionList[newSectionList.length - index - 1].text;
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// Check also the content of the node since new lines can be added just at the beggining
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if(index >= newSectionList.length || section.text != newSectionText || section.highlightedContent.textContent != newSectionText) {
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rightIndex = -index;
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return true;
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}
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});
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if(leftIndex - rightIndex > sectionList.length) {
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// Prevent overlap
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rightIndex = leftIndex - sectionList.length;
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}
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// Create an array composed of left unmodified, modified, right
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// unmodified sections
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var leftSections = sectionList.slice(0, leftIndex);
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modifiedSections = newSectionList.slice(leftIndex, newSectionList.length + rightIndex);
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var rightSections = sectionList.slice(sectionList.length + rightIndex, sectionList.length);
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insertBeforeSection = _.first(rightSections);
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sectionsToRemove = sectionList.slice(leftIndex, sectionList.length + rightIndex);
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sectionList = leftSections.concat(modifiedSections).concat(rightSections);
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}
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function highlightSections() {
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selectionStart = inputElt.selectionStart;
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selectionEnd = inputElt.selectionEnd;
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var newSectionEltList = document.createDocumentFragment();
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modifiedSections.forEach(function(section) {
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highlight(section);
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newSectionEltList.appendChild(section.highlightedContent);
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});
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if(fileChanged === true) {
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editor.contentElt.innerHTML = '';
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editor.contentElt.appendChild(newSectionEltList);
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inputElt.setSelectionRange(selectionStart, selectionEnd);
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}
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else {
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// Remove outdated sections
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sectionsToRemove.forEach(function(section) {
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var sectionElt = document.getElementById("wmd-input-section-" + section.id);
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// section can be already removed
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sectionElt && editor.contentElt.removeChild(sectionElt);
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});
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if(insertBeforeSection !== undefined) {
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var insertBeforeElt = document.getElementById("wmd-input-section-" + insertBeforeSection.id);
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editor.contentElt.insertBefore(newSectionEltList, insertBeforeElt);
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}
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else {
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editor.contentElt.appendChild(newSectionEltList);
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}
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//var dummyTextNode = document.createTextNode('\n');
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//editor.contentElt.appendChild(dummyTextNode);
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inputElt.setSelectionRange(selectionStart, selectionEnd);
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// Remove textNodes created outside sections
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var childNode = editor.contentElt.firstChild;
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while(childNode) {
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var nextNode = childNode.nextSibling;
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if(childNode.nodeType == 3) {
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editor.contentElt.removeChild(childNode);
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}
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childNode = nextNode;
|
|
}
|
|
}
|
|
}
|
|
/*
|
|
function asyncHighlightSections() {
|
|
var startTime = Date.now();
|
|
var deferredList = [];
|
|
modifiedSections.forEach(function(section) {
|
|
var deferred = $.Deferred();
|
|
setTimeout(function() {
|
|
highlight(section);
|
|
deferred.resolve();
|
|
}, 0);
|
|
deferredList.push(deferred);
|
|
});
|
|
$.when.apply($, deferredList).then(function() {
|
|
var text = _.reduce(sectionList, function(text, section) {
|
|
return text + section.text;
|
|
}, '');
|
|
|
|
// Check that the editor has the actual value
|
|
if(inputElt.textContent == text) {
|
|
selectionStart = inputElt.selectionStart;
|
|
selectionEnd = inputElt.selectionEnd;
|
|
|
|
var newSectionEltList = document.createDocumentFragment();
|
|
modifiedSections.forEach(function(section) {
|
|
newSectionEltList.appendChild(section.highlightedContent);
|
|
});
|
|
|
|
if(insertBeforeSection !== undefined) {
|
|
var insertBeforeElt = document.getElementById("wmd-input-section-" + insertBeforeSection.id);
|
|
editor.$contentElt[0].insertBefore(newSectionEltList, insertBeforeElt);
|
|
}
|
|
else {
|
|
editor.$contentElt[0].appendChild(newSectionEltList);
|
|
}
|
|
|
|
inputElt.setSelectionRange(selectionStart, selectionEnd);
|
|
elapsedTime = Date.now() - startTime;
|
|
}
|
|
});
|
|
}
|
|
*/
|
|
function highlight(section) {
|
|
var text = section.text.replace(/&/g, '&').replace(/</g, '<').replace(/\u00a0/g, ' ');
|
|
var sectionElt = crel('span', {
|
|
id: 'wmd-input-section-' + section.id,
|
|
class: 'wmd-input-section'
|
|
});
|
|
sectionElt.innerHTML = Prism.highlight(text, Prism.languages.md);
|
|
section.highlightedContent = sectionElt;
|
|
}
|
|
|
|
return editor;
|
|
}); |