From c3781e0e2f2f84a340bae65542e819d54610945a Mon Sep 17 00:00:00 2001 From: Gnome Ann <> Date: Mon, 27 Sep 2021 13:11:15 -0400 Subject: [PATCH] Rewrite the code for the editor for better browser compat Does not work well on mobile. That's on my to-do list, don't you worry! --- static/application.js | 314 +++++++++++++++++++++++++++------------ static/custom.css | 4 +- static/rangy-core.min.js | 11 ++ templates/index.html | 3 +- 4 files changed, 231 insertions(+), 101 deletions(-) create mode 100644 static/rangy-core.min.js diff --git a/static/application.js b/static/application.js index 2431db49..197c0494 100644 --- a/static/application.js +++ b/static/application.js @@ -69,8 +69,10 @@ var gamestarted = false; var editmode = false; var connected = false; var newly_loaded = true; -var current_editing_chunk = null; -var chunk_conflict = false; +var modified_chunks = new Set(); +var empty_chunks = new Set(); +var mutation_observer = null; +var gametext_bound = false; var sman_allow_delete = false; var sman_allow_rename = false; @@ -720,9 +722,6 @@ function setadventure(state) { function autofocus(event) { if(connected) { - if(event.target.tagName == "CHUNK") { - current_editing_chunk = event.target; - } event.target.focus(); } else { event.preventDefault(); @@ -740,65 +739,6 @@ function chunkOnKeyDown(event) { return; } - // Allow left and right arrow keys (and backspace) to move between chunks - switch(event.keyCode) { - case 37: // left - case 39: // right - var old_range = getSelection().getRangeAt(0); - var old_range_start = old_range.startOffset; - var old_range_end = old_range.endOffset; - var old_range_ancestor = old_range.commonAncestorContainer; - var old_range_start_container = old_range.startContainer; - var old_range_end_container = old_range.endContainer; - setTimeout(function () { - // Wait a few milliseconds and check if the caret has moved - var new_selection = getSelection(); - var new_range = new_selection.getRangeAt(0); - if(old_range_start != new_range.startOffset || old_range_end != new_range.endOffset || old_range_ancestor != new_range.commonAncestorContainer || old_range_start_container != new_range.startContainer || old_range_end_container != new_range.endContainer) { - return; - } - // If it hasn't moved, we're at the beginning or end of a chunk - // and the caret must be moved to a different chunk - var chunk = document.activeElement; - switch(event.keyCode) { - case 37: // left - if((chunk = chunk.previousSibling) && chunk.tagName == "CHUNK") { - var range = document.createRange(); - range.selectNodeContents(chunk); - range.collapse(false); - new_selection.removeAllRanges(); - new_selection.addRange(range); - } - break; - - case 39: // right - if((chunk = chunk.nextSibling) && chunk.tagName == "CHUNK") { - chunk.focus(); - } - } - }, 2); - return; - - case 8: // backspace - var old_length = document.activeElement.innerText.length; - setTimeout(function () { - // Wait a few milliseconds and compare the chunk's length - if(old_length != document.activeElement.innerText.length) { - return; - } - // If it's the same, we're at the beginning of a chunk - if((chunk = document.activeElement.previousSibling) && chunk.tagName == "CHUNK") { - var range = document.createRange(); - var selection = getSelection(); - range.selectNodeContents(chunk); - range.collapse(false); - selection.removeAllRanges(); - selection.addRange(range); - } - }, 2); - return - } - // Don't allow any edits if not connected to server if(!connected) { event.preventDefault(); @@ -820,25 +760,6 @@ function chunkOnKeyDown(event) { } } -function submitEditedChunk(event) { - // Don't do anything if the current chunk hasn't been edited or if someone - // else overwrote it while you were busy lollygagging - if(current_editing_chunk === null || chunk_conflict) { - chunk_conflict = false; - return; - } - - var chunk = current_editing_chunk; - current_editing_chunk = null; - - // Submit the edited chunk if it's not empty, otherwise delete it - if(chunk.innerText.length) { - socket.send({'cmd': 'inlineedit', 'chunk': chunk.getAttribute("n"), 'data': chunk.innerText.replace(/\u00a0/g, " ")}); - } else { - socket.send({'cmd': 'inlinedelete', 'data': chunk.getAttribute("n")}); - } -} - function downloadStory(format) { var filename_without_extension = storyname !== null ? storyname : "untitled"; @@ -890,6 +811,179 @@ function downloadStory(format) { URL.revokeObjectURL(objectURL); } +function buildChunkSetFromNodeArray(nodes) { + var set = new Set(); + for(var i = 0; i < nodes.length; i++) { + node = nodes[i]; + while(node !== null && node.tagName !== "CHUNK") { + node = node.parentNode; + } + if(node === null) { + continue; + } + set.add(node.getAttribute("n")); + } + return set; +} + +function getSelectedNodes() { + var range = rangy.getSelection().getRangeAt(0); // rangy is not a typo + var nodes = range.getNodes([1,3]); + nodes.push(range.startContainer); + nodes.push(range.endContainer); + return nodes +} + +function applyChunkDeltas(nodes) { + var chunks = Array.from(buildChunkSetFromNodeArray(nodes)); + for(var i = 0; i < chunks.length; i++) { + modified_chunks.add(chunks[i]); + } + setTimeout(function() { + var chunks = Array.from(modified_chunks); + var selected_chunks = buildChunkSetFromNodeArray(getSelectedNodes()); + for(var i = 0; i < chunks.length; i++) { + var chunk = document.getElementById("n" + chunks[i]); + if(chunk && chunk.innerText.length != 0) { + if(!selected_chunks.has(chunks[i])) { + modified_chunks.delete(chunks[i]); + socket.send({'cmd': 'inlineedit', 'chunk': chunks[i], 'data': chunk.innerText.replace(/\u00a0/g, " ")}); + } + empty_chunks.delete(chunks[i]); + } else { + if(!selected_chunks.has(chunks[i])) { + modified_chunks.delete(chunks[i]); + socket.send({'cmd': 'inlineedit', 'chunk': chunks[i], 'data': ''}); + } + empty_chunks.add(chunks[i]); + } + } + }, 2); +} + +function syncAllModifiedChunks(including_selected_chunks=false) { + var chunks = Array.from(modified_chunks); + var selected_chunks = buildChunkSetFromNodeArray(getSelectedNodes()); + for(var i = 0; i < chunks.length; i++) { + if(including_selected_chunks || !selected_chunks.has(chunks[i])) { + modified_chunks.delete(chunks[i]); + var chunk = document.getElementById("n" + chunks[i]); + var data = chunk ? document.getElementById("n" + chunks[i]).innerText.replace(/\u00a0/g, " ") : ""; + if(data.length == 0) { + empty_chunks.add(chunks[i]); + } else { + empty_chunks.delete(chunks[i]); + } + socket.send({'cmd': 'inlineedit', 'chunk': chunks[i], 'data': data}); + } + } +} + +function deleteEmptyChunks() { + var chunks = Array.from(empty_chunks); + for(var i = 0; i < chunks.length; i++) { + empty_chunks.delete(chunks[i]); + socket.send({'cmd': 'inlinedelete', 'data': chunks[i]}); + } +} + +function highlightEditingChunks() { + var chunks = $('chunk.editing').toArray(); + var selected_chunks = buildChunkSetFromNodeArray(getSelectedNodes()); + for(var i = 0; i < chunks.length; i++) { + var chunk = chunks[i]; + if(!selected_chunks.has(chunks[i].getAttribute("n"))) { + unbindGametext(); + $(chunk).removeClass('editing'); + bindGametext(); + } + } + chunks = Array.from(selected_chunks); + for(var i = 0; i < chunks.length; i++) { + var chunk = $("#n"+chunks[i]); + unbindGametext(); + chunk.addClass('editing'); + bindGametext(); + } +} + +// (Desktop client only) This gets run every time the text in a chunk is edited +// or a chunk is deleted +function chunkOnDOMMutate(mutations, observer) { + if(!gametext_bound) { + return; + } + var nodes = []; + for(var i = 0; i < mutations.length; i++) { + var mutation = mutations[i]; + if(mutation.type === "childList") { + nodes = nodes.concat(Array.from(mutation.addedNodes), Array.from(mutation.removedNodes)); + } else { + nodes.push(mutation.target); + } + } + applyChunkDeltas(nodes); +} + +// This gets run every time you try to paste text into the editor +function chunkOnPaste(event) { + if(!gametext_bound) { + return; + } + // If possible, intercept paste events into the editor in order to always + // paste as plaintext + if(event.originalEvent.clipboardData && document.queryCommandSupported && document.execCommand && document.queryCommandSupported('insertText')) { + event.preventDefault(); + document.execCommand('insertText', false, event.originalEvent.clipboardData.getData('text/plain')); + } +} + +// (Desktop client only) This gets run every time the caret moves in the editor +function chunkOnSelectionChange(event) { + if(!gametext_bound) { + return; + } + setTimeout(function() { + syncAllModifiedChunks(); + setTimeout(function() { + highlightEditingChunks(); + }, 2); + }, 2); +} + +// (Desktop client only) This gets run when you defocus the editor by clicking +// outside of the editor or by pressing escape or tab +function chunkOnFocusOut(event) { + if(!gametext_bound || event.target !== gametext) { + return; + } + setTimeout(function() { + if(document.activeElement === gametext || gametext.contains(document.activeElement)) { + return; + } + syncAllModifiedChunks(true); + setTimeout(function() { + var blurred = $("#gametext")[0] !== document.activeElement; + if(blurred) { + deleteEmptyChunks(); + } + setTimeout(function() { + $("chunk").removeClass('editing'); + }, 2); + }, 2); + }, 2); +} + +function bindGametext() { + mutation_observer.observe($("#gametext")[0], {characterData: true, childList: true, subtree: true}); + gametext_bound = true; +} + +function unbindGametext() { + mutation_observer.disconnect(); + gametext_bound = false; +} + //=================================================================// // READY/RUNTIME //=================================================================// @@ -973,11 +1067,11 @@ $(document).ready(function(){ format_menu.html(""); wi_menu.html(""); // Set up "Allow Editing" - $('body').on('input', autofocus).on('keydown', 'chunk', chunkOnKeyDown).on('focusout', 'chunk', submitEditedChunk); - $('#allowediting').prop('checked', allowedit).prop('disabled', false).change().on('change', function () { + $('body').on('input', autofocus); + $('#allowediting').prop('checked', allowedit).prop('disabled', false).change().off('change').on('change', function () { if(allowtoggle) { - allowedit = $(this).prop('checked') - $("chunk").attr('contenteditable', allowedit) + allowedit = $(this).prop('checked'); + $(gametext).attr('contenteditable', allowedit); } }); } else if(msg.cmd == "updatescreen") { @@ -987,13 +1081,11 @@ $(document).ready(function(){ action_mode = 0; changemode(); } - // Send game content to Game Screen - if(allowedit && document.activeElement.tagName == "CHUNK") { - chunk_conflict = true; - } + unbindGametext(); + modified_chunks = new Set(); + empty_chunks = new Set(); game_text.html(msg.data); - // Make content editable if need be - $('chunk').attr('contenteditable', allowedit); + bindGametext(); // Scroll to bottom of text if(newly_loaded) { scrollToBottom(); @@ -1007,15 +1099,16 @@ $(document).ready(function(){ const {index, html, last} = msg.data; const existingChunk = game_text.children(`#n${index}`) const newChunk = $(html); + unbindGametext(); if (existingChunk.length > 0) { // Update existing chunk existingChunk.before(newChunk); existingChunk.remove(); - } else { + } else if (!empty_chunks.has(index.toString())) { // Append at the end game_text.append(newChunk); } - newChunk.attr('contenteditable', allowedit); + bindGametext(); hide([$('#curtain')]); if(last) { // Scroll to bottom of text if it's the last element @@ -1024,8 +1117,9 @@ $(document).ready(function(){ } else if(msg.cmd == "removechunk") { hideMessage(); let index = msg.data; - // Remove the chunk - game_text.children(`#n${index}`).remove() + unbindGametext(); + game_text.children(`#n${index}`).remove() // Remove the chunk + bindGametext(); hide([$('#curtain')]); } else if(msg.cmd == "setgamestate") { // Enable or Disable buttons @@ -1252,7 +1346,31 @@ $(document).ready(function(){ connect_status.removeClass("color_green"); connect_status.addClass("color_orange"); }); - + + // Register editing events (desktop) + $(gametext).on('keydown', + chunkOnKeyDown + ).on('paste', + chunkOnPaste + ).on('focus', + chunkOnSelectionChange + ).on('keydown', + chunkOnSelectionChange + ).on('focusout', + chunkOnFocusOut + ); + mutation_observer = new MutationObserver(chunkOnDOMMutate); + + // This is required for the editor to work correctly in Firefox on desktop + // because the gods of HTML and JavaScript say so + $(document.body).on('focusin', function(event) { + setTimeout(function() { + if(document.activeElement !== gametext && gametext.contains(document.activeElement)) { + gametext.focus(); + } + }, 2); + }); + // Bind actions to UI buttons button_send.on("click", function(ev) { dosubmit(); diff --git a/static/custom.css b/static/custom.css index da040295..634a2eb8 100644 --- a/static/custom.css +++ b/static/custom.css @@ -11,12 +11,12 @@ chunk { font-weight: bold; } -chunk[contenteditable="true"]:focus, chunk[contenteditable="true"]:focus * { +chunk.editing, chunk.editing * { color: #cdf !important; font-weight: normal !important; } -chunk, chunk * { +#gametext, chunk, chunk * { outline: 0px solid transparent; } diff --git a/static/rangy-core.min.js b/static/rangy-core.min.js new file mode 100644 index 00000000..ea65b24d --- /dev/null +++ b/static/rangy-core.min.js @@ -0,0 +1,11 @@ +/** + * Rangy, a cross-browser JavaScript range and selection library + * https://github.com/timdown/rangy + * + * Copyright 2015, Tim Down + * Licensed under the MIT license. + * Version: 1.3.0 + * Build date: 10 May 2015 + */ +!function(e,t){"function"==typeof define&&define.amd?define(e):"undefined"!=typeof module&&"object"==typeof exports?module.exports=e():t.rangy=e()}(function(){function e(e,t){var n=typeof e[t];return n==N||!(n!=C||!e[t])||"unknown"==n}function t(e,t){return!(typeof e[t]!=C||!e[t])}function n(e,t){return typeof e[t]!=E}function r(e){return function(t,n){for(var r=n.length;r--;)if(!e(t,n[r]))return!1;return!0}}function o(e){return e&&O(e,T)&&D(e,w)}function i(e){return t(e,"body")?e.body:e.getElementsByTagName("body")[0]}function a(t){typeof console!=E&&e(console,"log")&&console.log(t)}function s(e,t){b&&t?alert(e):a(e)}function c(e){I.initialized=!0,I.supported=!1,s("Rangy is not supported in this environment. 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e,t;if(this.collapsed)return n(this).createDocumentFragment();if(this.startContainer===this.endContainer&&L(this.startContainer))return e=this.startContainer.cloneNode(!0),e.data=e.data.slice(this.startOffset,this.endOffset),t=n(this).createDocumentFragment(),t.appendChild(e),t;var r=new g(this,!0);return e=c(r),r.detach(),e},canSurroundContents:function(){w(this),N(this.startContainer),N(this.endContainer);var e=new g(this,!0),n=e._first&&t(e._first,this)||e._last&&t(e._last,this);return e.detach(),!n},surroundContents:function(e){if(R(e,et),!this.canSurroundContents())throw new k("INVALID_STATE_ERR");var t=this.extractContents();if(e.hasChildNodes())for(;e.lastChild;)e.removeChild(e.lastChild);a(e,this.startContainer,this.startOffset),e.appendChild(t),this.selectNode(e)},cloneRange:function(){w(this);for(var e,t=new I(n(this)),r=ct.length;r--;)e=ct[r],t[e]=this[e];return t},toString:function(){w(this);var e=this.startContainer;if(e===this.endContainer&&L(e))return 3==e.nodeType||4==e.nodeType?e.data.slice(this.startOffset,this.endOffset):"";var t=[],n=new g(this,!0);return d(n,function(e){(3==e.nodeType||4==e.nodeType)&&t.push(e.data)}),n.detach(),t.join("")},compareNode:function(e){w(this);var t=e.parentNode,n=W(e);if(!t)throw new k("NOT_FOUND_ERR");var r=this.comparePoint(t,n),o=this.comparePoint(t,n+1);return 0>r?o>0?pt:ht:o>0?gt:mt},comparePoint:function(e,t){return w(this),E(e,"HIERARCHY_REQUEST_ERR"),C(e,this.startContainer),z(e,t,this.startContainer,this.startOffset)<0?-1:z(e,t,this.endContainer,this.endOffset)>0?1:0},createContextualFragment:st,toHtml:function(){return O(this)},intersectsNode:function(e,t){if(w(this),Q(e)!=r(this))return!1;var n=e.parentNode,o=W(e);if(!n)return!0;var i=z(n,o,this.endContainer,this.endOffset),a=z(n,o+1,this.startContainer,this.startOffset);return t?0>=i&&a>=0:0>i&&a>0},isPointInRange:function(e,t){return w(this),E(e,"HIERARCHY_REQUEST_ERR"),C(e,this.startContainer),z(e,t,this.startContainer,this.startOffset)>=0&&z(e,t,this.endContainer,this.endOffset)<=0},intersectsRange:function(e){return s(this,e,!1)},intersectsOrTouchesRange:function(e){return s(this,e,!0)},intersection:function(e){if(this.intersectsRange(e)){var t=z(this.startContainer,this.startOffset,e.startContainer,e.startOffset),n=z(this.endContainer,this.endOffset,e.endContainer,e.endOffset),r=this.cloneRange();return-1==t&&r.setStart(e.startContainer,e.startOffset),1==n&&r.setEnd(e.endContainer,e.endOffset),r}return null},union:function(e){if(this.intersectsOrTouchesRange(e)){var t=this.cloneRange();return-1==z(e.startContainer,e.startOffset,this.startContainer,this.startOffset)&&t.setStart(e.startContainer,e.startOffset),1==z(e.endContainer,e.endOffset,this.endContainer,this.endOffset)&&t.setEnd(e.endContainer,e.endOffset),t}throw new k("Ranges do not intersect")},containsNode:function(e,t){return t?this.intersectsNode(e,!1):this.compareNode(e)==mt},containsNodeContents:function(e){return this.comparePoint(e,0)>=0&&this.comparePoint(e,q(e))<=0},containsRange:function(e){var t=this.intersection(e);return null!==t&&e.equals(t)},containsNodeText:function(e){var t=this.cloneRange();t.selectNode(e);var n=t.getNodes([3]);if(n.length>0){t.setStart(n[0],0);var r=n.pop();return t.setEnd(r,r.length),this.containsRange(t)}return this.containsNodeContents(e)},getNodes:function(e,t){return w(this),l(this,e,t)},getDocument:function(){return n(this)},collapseBefore:function(e){this.setEndBefore(e),this.collapse(!1)},collapseAfter:function(e){this.setStartAfter(e),this.collapse(!0)},getBookmark:function(t){var r=n(this),o=e.createRange(r);t=t||B.getBody(r),o.selectNodeContents(t);var i=this.intersection(o),a=0,s=0;return i&&(o.setEnd(i.startContainer,i.startOffset),a=o.toString().length,s=a+i.toString().length),{start:a,end:s,containerNode:t}},moveToBookmark:function(e){var t=e.containerNode,n=0;this.setStart(t,0),this.collapse(!0);for(var r,o,i,a,s=[t],c=!1,d=!1;!d&&(r=s.pop());)if(3==r.nodeType)o=n+r.length,!c&&e.start>=n&&e.start<=o&&(this.setStart(r,e.start-n),c=!0),c&&e.end>=n&&e.end<=o&&(this.setEnd(r,e.end-n),d=!0),n=o;else for(a=r.childNodes,i=a.length;i--;)s.push(a[i])},getName:function(){return"DomRange"},equals:function(e){return I.rangesEqual(this,e)},isValid:function(){return y(this)},inspect:function(){return h(this)},detach:function(){}}),x(I,P),H.extend(I,{rangeProperties:ct,RangeIterator:g,copyComparisonConstants:D,createPrototypeRange:x,inspect:h,toHtml:O,getRangeDocument:n,rangesEqual:function(e,t){return e.startContainer===t.startContainer&&e.startOffset===t.startOffset&&e.endContainer===t.endContainer&&e.endOffset===t.endOffset}}),e.DomRange=I}),I.createCoreModule("WrappedRange",["DomRange"],function(e,t){var n,r,o=e.dom,i=e.util,a=o.DomPosition,s=e.DomRange,c=o.getBody,d=o.getContentDocument,f=o.isCharacterDataNode;if(e.features.implementsDomRange&&!function(){function r(e){for(var t,n=l.length;n--;)t=l[n],e[t]=e.nativeRange[t];e.collapsed=e.startContainer===e.endContainer&&e.startOffset===e.endOffset}function a(e,t,n,r,o){var i=e.startContainer!==t||e.startOffset!=n,a=e.endContainer!==r||e.endOffset!=o,s=!e.equals(e.nativeRange);(i||a||s)&&(e.setEnd(r,o),e.setStart(t,n))}var f,u,l=s.rangeProperties;n=function(e){if(!e)throw t.createError("WrappedRange: Range must be specified");this.nativeRange=e,r(this)},s.createPrototypeRange(n,a),f=n.prototype,f.selectNode=function(e){this.nativeRange.selectNode(e),r(this)},f.cloneContents=function(){return this.nativeRange.cloneContents()},f.surroundContents=function(e){this.nativeRange.surroundContents(e),r(this)},f.collapse=function(e){this.nativeRange.collapse(e),r(this)},f.cloneRange=function(){return new n(this.nativeRange.cloneRange())},f.refresh=function(){r(this)},f.toString=function(){return this.nativeRange.toString()};var h=document.createTextNode("test");c(document).appendChild(h);var g=document.createRange();g.setStart(h,0),g.setEnd(h,0);try{g.setStart(h,1),f.setStart=function(e,t){this.nativeRange.setStart(e,t),r(this)},f.setEnd=function(e,t){this.nativeRange.setEnd(e,t),r(this)},u=function(e){return function(t){this.nativeRange[e](t),r(this)}}}catch(p){f.setStart=function(e,t){try{this.nativeRange.setStart(e,t)}catch(n){this.nativeRange.setEnd(e,t),this.nativeRange.setStart(e,t)}r(this)},f.setEnd=function(e,t){try{this.nativeRange.setEnd(e,t)}catch(n){this.nativeRange.setStart(e,t),this.nativeRange.setEnd(e,t)}r(this)},u=function(e,t){return function(n){try{this.nativeRange[e](n)}catch(o){this.nativeRange[t](n),this.nativeRange[e](n)}r(this)}}}f.setStartBefore=u("setStartBefore","setEndBefore"),f.setStartAfter=u("setStartAfter","setEndAfter"),f.setEndBefore=u("setEndBefore","setStartBefore"),f.setEndAfter=u("setEndAfter","setStartAfter"),f.selectNodeContents=function(e){this.setStartAndEnd(e,0,o.getNodeLength(e))},g.selectNodeContents(h),g.setEnd(h,3);var m=document.createRange();m.selectNodeContents(h),m.setEnd(h,4),m.setStart(h,2),f.compareBoundaryPoints=-1==g.compareBoundaryPoints(g.START_TO_END,m)&&1==g.compareBoundaryPoints(g.END_TO_START,m)?function(e,t){return t=t.nativeRange||t,e==t.START_TO_END?e=t.END_TO_START:e==t.END_TO_START&&(e=t.START_TO_END),this.nativeRange.compareBoundaryPoints(e,t)}:function(e,t){return this.nativeRange.compareBoundaryPoints(e,t.nativeRange||t)};var R=document.createElement("div");R.innerHTML="123";var v=R.firstChild,C=c(document);C.appendChild(R),g.setStart(v,1),g.setEnd(v,2),g.deleteContents(),"13"==v.data&&(f.deleteContents=function(){this.nativeRange.deleteContents(),r(this)},f.extractContents=function(){var e=this.nativeRange.extractContents();return r(this),e}),C.removeChild(R),C=null,i.isHostMethod(g,"createContextualFragment")&&(f.createContextualFragment=function(e){return this.nativeRange.createContextualFragment(e)}),c(document).removeChild(h),f.getName=function(){return"WrappedRange"},e.WrappedRange=n,e.createNativeRange=function(e){return e=d(e,t,"createNativeRange"),e.createRange()}}(),e.features.implementsTextRange){var u=function(e){var t=e.parentElement(),n=e.duplicate();n.collapse(!0);var r=n.parentElement();n=e.duplicate(),n.collapse(!1);var i=n.parentElement(),a=r==i?r:o.getCommonAncestor(r,i);return a==t?a:o.getCommonAncestor(t,a)},l=function(e){return 0==e.compareEndPoints("StartToEnd",e)},h=function(e,t,n,r,i){var s=e.duplicate();s.collapse(n);var c=s.parentElement();if(o.isOrIsAncestorOf(t,c)||(c=t),!c.canHaveHTML){var d=new a(c.parentNode,o.getNodeIndex(c));return{boundaryPosition:d,nodeInfo:{nodeIndex:d.offset,containerElement:d.node}}}var u=o.getDocument(c).createElement("span");u.parentNode&&o.removeNode(u);for(var l,h,g,p,m,R=n?"StartToStart":"StartToEnd",v=i&&i.containerElement==c?i.nodeIndex:0,C=c.childNodes.length,N=C,E=N;;){if(E==C?c.appendChild(u):c.insertBefore(u,c.childNodes[E]),s.moveToElementText(u),l=s.compareEndPoints(R,e),0==l||v==N)break;if(-1==l){if(N==v+1)break;v=E}else N=N==v+1?v:E;E=Math.floor((v+N)/2),c.removeChild(u)}if(m=u.nextSibling,-1==l&&m&&f(m)){s.setEndPoint(n?"EndToStart":"EndToEnd",e);var S;if(/[\r\n]/.test(m.data)){var y=s.duplicate(),w=y.text.replace(/\r\n/g,"\r").length;for(S=y.moveStart("character",w);-1==(l=y.compareEndPoints("StartToEnd",y));)S++,y.moveStart("character",1)}else S=s.text.length;p=new a(m,S)}else h=(r||!n)&&u.previousSibling,g=(r||n)&&u.nextSibling,p=g&&f(g)?new a(g,0):h&&f(h)?new a(h,h.data.length):new a(c,o.getNodeIndex(u));return o.removeNode(u),{boundaryPosition:p,nodeInfo:{nodeIndex:E,containerElement:c}}},g=function(e,t){var n,r,i,a,s=e.offset,d=o.getDocument(e.node),u=c(d).createTextRange(),l=f(e.node);return l?(n=e.node,r=n.parentNode):(a=e.node.childNodes,n=st;++t)if(!D.isAncestorOf(e[0],e[t]))return!1;return!0}function l(e){var n=e.getNodes();if(!u(n))throw t.createError("getSingleElementFromRange: range "+e.inspect()+" did not consist of a single element");return n[0]}function h(e){return!!e&&"undefined"!=typeof e.text}function g(e,t){var n=new P(t);e._ranges=[n],s(e,n,!1),e.rangeCount=1,e.isCollapsed=n.collapsed}function p(t){if(t._ranges.length=0,"None"==t.docSelection.type)d(t);else{var n=t.docSelection.createRange();if(h(n))g(t,n);else{t.rangeCount=n.length;for(var r,o=k(n.item(0)),i=0;is;++s)a.add(r.item(s));try{a.add(o)}catch(d){throw t.createError("addRange(): Element within the specified Range could not be added to control selection (does it have layout?)")}a.select(),p(e)}function R(e,t,n){this.nativeSelection=e,this.docSelection=t,this._ranges=[],this.win=n,this.refresh()}function v(e){e.win=e.anchorNode=e.focusNode=e._ranges=null,e.rangeCount=e.anchorOffset=e.focusOffset=0,e.detached=!0}function C(e,t){for(var n,r,o=tt.length;o--;)if(n=tt[o],r=n.selection,"deleteAll"==t)v(r);else if(n.win==e)return"delete"==t?(tt.splice(o,1),!0):r;return"deleteAll"==t&&(tt.length=0),null}function N(e,n){for(var r,o=k(n[0].startContainer),i=L(o).createControlRange(),a=0,s=n.length;s>a;++a){r=l(n[a]);try{i.add(r)}catch(c){throw t.createError("setRanges(): Element within one of the specified Ranges could not be added to control selection (does it have layout?)")}}i.select(),p(e)}function E(e,t){if(e.win.document!=k(t))throw new I("WRONG_DOCUMENT_ERR")}function S(t){return function(n,r){var o;this.rangeCount?(o=this.getRangeAt(0),o["set"+(t?"Start":"End")](n,r)):(o=e.createRange(this.win.document),o.setStartAndEnd(n,r)),this.setSingleRange(o,this.isBackward())}}function y(e){var t=[],n=new B(e.anchorNode,e.anchorOffset),r=new B(e.focusNode,e.focusOffset),o="function"==typeof e.getName?e.getName():"Selection";if("undefined"!=typeof e.rangeCount)for(var i=0,a=e.rangeCount;a>i;++i)t[i]=b.inspect(e.getRangeAt(i));return"["+o+"(Ranges: "+t.join(", ")+")(anchor: "+n.inspect()+", focus: "+r.inspect()+"]"}e.config.checkSelectionRanges=!0;var w,T,O="boolean",_="number",D=e.dom,A=e.util,x=A.isHostMethod,b=e.DomRange,P=e.WrappedRange,I=e.DOMException,B=D.DomPosition,H=e.features,M="Control",k=D.getDocument,L=D.getBody,W=b.rangesEqual,F=x(window,"getSelection"),j=A.isHostObject(document,"selection");H.implementsWinGetSelection=F,H.implementsDocSelection=j;var z=j&&(!F||e.config.preferTextRange);if(z)w=i,e.isSelectionValid=function(e){var t=r(e,"isSelectionValid").document,n=t.selection;return"None"!=n.type||k(n.createRange().parentElement())==t};else{if(!F)return t.fail("Neither document.selection or window.getSelection() detected."),!1;w=o,e.isSelectionValid=function(){return!0}}e.getNativeSelection=w;var U=w();if(!U)return t.fail("Native selection was null (possibly issue 138?)"),!1;var V=e.createNativeRange(document),q=L(document),Y=A.areHostProperties(U,["anchorNode","focusNode","anchorOffset","focusOffset"]);H.selectionHasAnchorAndFocus=Y;var Q=x(U,"extend");H.selectionHasExtend=Q;var G=typeof U.rangeCount==_;H.selectionHasRangeCount=G;var X=!1,Z=!0,$=Q?function(t,n){var r=b.getRangeDocument(n),o=e.createRange(r);o.collapseToPoint(n.endContainer,n.endOffset),t.addRange(f(o)),t.extend(n.startContainer,n.startOffset)}:null;A.areHostMethods(U,["addRange","getRangeAt","removeAllRanges"])&&typeof U.rangeCount==_&&H.implementsDomRange&&!function(){var t=window.getSelection();if(t){for(var n=t.rangeCount,r=n>1,o=[],i=a(t),s=0;n>s;++s)o[s]=t.getRangeAt(s);var c=D.createTestElement(document,"",!1),d=c.appendChild(document.createTextNode("   ")),f=document.createRange();if(f.setStart(d,1),f.collapse(!0),t.removeAllRanges(),t.addRange(f),Z=1==t.rangeCount,t.removeAllRanges(),!r){var u=window.navigator.appVersion.match(/Chrome\/(.*?) /);if(u&&parseInt(u[1])>=36)X=!1;else{var l=f.cloneRange();f.setStart(d,0),l.setEnd(d,3),l.setStart(d,2),t.addRange(f),t.addRange(l),X=2==t.rangeCount}}for(D.removeNode(c),t.removeAllRanges(),s=0;n>s;++s)0==s&&i?$?$(t,o[s]):(e.warn("Rangy initialization: original selection was backwards but selection has been restored forwards because the browser does not support Selection.extend"),t.addRange(o[s])):t.addRange(o[s])}}(),H.selectionSupportsMultipleRanges=X,H.collapsedNonEditableSelectionsSupported=Z;var J,K=!1;q&&x(q,"createControlRange")&&(J=q.createControlRange(),A.areHostProperties(J,["item","add"])&&(K=!0)),H.implementsControlRange=K,T=Y?function(e){return e.anchorNode===e.focusNode&&e.anchorOffset===e.focusOffset}:function(e){return e.rangeCount?e.getRangeAt(e.rangeCount-1).collapsed:!1};var et;x(U,"getRangeAt")?et=function(e,t){try{return e.getRangeAt(t)}catch(n){return null}}:Y&&(et=function(t){var n=k(t.anchorNode),r=e.createRange(n);return r.setStartAndEnd(t.anchorNode,t.anchorOffset,t.focusNode,t.focusOffset),r.collapsed!==this.isCollapsed&&r.setStartAndEnd(t.focusNode,t.focusOffset,t.anchorNode,t.anchorOffset),r}),R.prototype=e.selectionPrototype;var tt=[],nt=function(e){if(e&&e instanceof R)return e.refresh(),e;e=r(e,"getNativeSelection");var t=C(e),n=w(e),o=j?i(e):null;return t?(t.nativeSelection=n,t.docSelection=o,t.refresh()):(t=new R(n,o,e),tt.push({win:e,selection:t})),t};e.getSelection=nt,A.createAliasForDeprecatedMethod(e,"getIframeSelection","getSelection");var rt=R.prototype;if(!z&&Y&&A.areHostMethods(U,["removeAllRanges","addRange"])){rt.removeAllRanges=function(){this.nativeSelection.removeAllRanges(),d(this)};var ot=function(e,t){$(e.nativeSelection,t),e.refresh()};rt.addRange=G?function(t,r){if(K&&j&&this.docSelection.type==M)m(this,t);else if(n(r)&&Q)ot(this,t);else{var o;X?o=this.rangeCount:(this.removeAllRanges(),o=0);var i=f(t).cloneRange();try{this.nativeSelection.addRange(i)}catch(a){}if(this.rangeCount=this.nativeSelection.rangeCount,this.rangeCount==o+1){if(e.config.checkSelectionRanges){var c=et(this.nativeSelection,this.rangeCount-1);c&&!W(c,t)&&(t=new P(c))}this._ranges[this.rangeCount-1]=t,s(this,t,st(this.nativeSelection)),this.isCollapsed=T(this)}else this.refresh()}}:function(e,t){n(t)&&Q?ot(this,e):(this.nativeSelection.addRange(f(e)),this.refresh())},rt.setRanges=function(e){if(K&&j&&e.length>1)N(this,e);else{this.removeAllRanges();for(var t=0,n=e.length;n>t;++t)this.addRange(e[t])}}}else{if(!(x(U,"empty")&&x(V,"select")&&K&&z))return t.fail("No means of selecting a Range or TextRange was found"),!1;rt.removeAllRanges=function(){try{if(this.docSelection.empty(),"None"!=this.docSelection.type){var e;if(this.anchorNode)e=k(this.anchorNode);else if(this.docSelection.type==M){var t=this.docSelection.createRange();t.length&&(e=k(t.item(0)))}if(e){var n=L(e).createTextRange();n.select(),this.docSelection.empty()}}}catch(r){}d(this)},rt.addRange=function(t){this.docSelection.type==M?m(this,t):(e.WrappedTextRange.rangeToTextRange(t).select(),this._ranges[0]=t,this.rangeCount=1,this.isCollapsed=this._ranges[0].collapsed,s(this,t,!1))},rt.setRanges=function(e){this.removeAllRanges();var t=e.length;t>1?N(this,e):t&&this.addRange(e[0])}}rt.getRangeAt=function(e){if(0>e||e>=this.rangeCount)throw new I("INDEX_SIZE_ERR");return this._ranges[e].cloneRange()};var it;if(z)it=function(t){var n;e.isSelectionValid(t.win)?n=t.docSelection.createRange():(n=L(t.win.document).createTextRange(),n.collapse(!0)),t.docSelection.type==M?p(t):h(n)?g(t,n):d(t)};else if(x(U,"getRangeAt")&&typeof U.rangeCount==_)it=function(t){if(K&&j&&t.docSelection.type==M)p(t);else if(t._ranges.length=t.rangeCount=t.nativeSelection.rangeCount,t.rangeCount){for(var n=0,r=t.rangeCount;r>n;++n)t._ranges[n]=new e.WrappedRange(t.nativeSelection.getRangeAt(n));s(t,t._ranges[t.rangeCount-1],st(t.nativeSelection)),t.isCollapsed=T(t)}else d(t)};else{if(!Y||typeof U.isCollapsed!=O||typeof V.collapsed!=O||!H.implementsDomRange)return t.fail("No means of obtaining a Range or TextRange from the user's selection was found"),!1;it=function(e){var t,n=e.nativeSelection;n.anchorNode?(t=et(n,0),e._ranges=[t],e.rangeCount=1,c(e),e.isCollapsed=T(e)):d(e)}}rt.refresh=function(e){var t=e?this._ranges.slice(0):null,n=this.anchorNode,r=this.anchorOffset;if(it(this),e){var o=t.length;if(o!=this._ranges.length)return!0;if(this.anchorNode!=n||this.anchorOffset!=r)return!0;for(;o--;)if(!W(t[o],this._ranges[o]))return!0;return!1}};var at=function(e,t){var n=e.getAllRanges();e.removeAllRanges();for(var r=0,o=n.length;o>r;++r)W(t,n[r])||e.addRange(n[r]);e.rangeCount||d(e)};rt.removeRange=K&&j?function(e){if(this.docSelection.type==M){for(var t,n=this.docSelection.createRange(),r=l(e),o=k(n.item(0)),i=L(o).createControlRange(),a=!1,s=0,c=n.length;c>s;++s)t=n.item(s),t!==r||a?i.add(n.item(s)):a=!0;i.select(),p(this)}else at(this,e)}:function(e){at(this,e)};var st;!z&&Y&&H.implementsDomRange?(st=a,rt.isBackward=function(){return st(this)}):st=rt.isBackward=function(){return!1},rt.isBackwards=rt.isBackward,rt.toString=function(){for(var e=[],t=0,n=this.rangeCount;n>t;++t)e[t]=""+this._ranges[t];return e.join("")},rt.collapse=function(t,n){E(this,t);var r=e.createRange(t);r.collapseToPoint(t,n),this.setSingleRange(r),this.isCollapsed=!0},rt.collapseToStart=function(){if(!this.rangeCount)throw new I("INVALID_STATE_ERR");var e=this._ranges[0];this.collapse(e.startContainer,e.startOffset)},rt.collapseToEnd=function(){if(!this.rangeCount)throw new I("INVALID_STATE_ERR");var e=this._ranges[this.rangeCount-1];this.collapse(e.endContainer,e.endOffset)},rt.selectAllChildren=function(t){E(this,t);var n=e.createRange(t);n.selectNodeContents(t),this.setSingleRange(n)},rt.deleteFromDocument=function(){if(K&&j&&this.docSelection.type==M){for(var e,t=this.docSelection.createRange();t.length;)e=t.item(0),t.remove(e),D.removeNode(e);this.refresh()}else if(this.rangeCount){var n=this.getAllRanges();if(n.length){this.removeAllRanges();for(var r=0,o=n.length;o>r;++r)n[r].deleteContents();this.addRange(n[o-1])}}},rt.eachRange=function(e,t){for(var n=0,r=this._ranges.length;r>n;++n)if(e(this.getRangeAt(n)))return t},rt.getAllRanges=function(){var 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-

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 +

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