Implemented sync merge
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benweet
parent
0e5f198270
commit
acebad8a65
@ -75,15 +75,78 @@ define([
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});
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var merge = settings.conflictMode == 'merge';
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Provider.prototype.merge = function(localContent, remoteContent, localTitle, remoteTitle, localDiscussionList, remoteDiscussionList, syncAttributes) {
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Provider.prototype.syncMerge = function(fileDesc, syncAttributes, remoteContent, remoteTitle, remoteDiscussionListJSON) {
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var lineArray = [];
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var lineHash = {};
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function linesToChars(text) {
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var chars = '';
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var lineArrayLength = lineArray.length;
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text.split('\n').forEach(function(line) {
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if(lineHash.hasOwnProperty(line)) {
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chars += String.fromCharCode(lineHash[line]);
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} else {
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chars += String.fromCharCode(lineArrayLength);
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lineHash[line] = lineArrayLength;
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lineArray[lineArrayLength++] = line;
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}
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});
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return chars;
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}
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function moveComments(oldTextContent, newTextContent, discussionList) {
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var changes = diffMatchPatch.diff_main(oldTextContent, newTextContent);
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var updateDiscussionList = false;
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var startOffset = 0;
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changes.forEach(function(change) {
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var changeType = change[0];
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var changeText = change[1];
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if(changeType === 0) {
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startOffset += changeText.length;
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return;
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}
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var endOffset = startOffset;
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var diffOffset = changeText.length;
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if(changeType === -1) {
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endOffset += diffOffset;
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diffOffset = -diffOffset;
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}
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discussionList.forEach(function(discussion) {
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// selectionEnd
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if(discussion.selectionEnd >= endOffset) {
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discussion.selectionEnd += diffOffset;
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updateDiscussionList = true;
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}
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else if(discussion.selectionEnd > startOffset) {
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discussion.selectionEnd = startOffset;
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updateDiscussionList = true;
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}
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// selectionStart
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if(discussion.selectionStart >= endOffset) {
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discussion.selectionStart += diffOffset;
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updateDiscussionList = true;
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}
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else if(discussion.selectionStart > startOffset) {
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discussion.selectionStart = startOffset;
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updateDiscussionList = true;
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}
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});
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startOffset = endOffset;
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});
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return updateDiscussionList;
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}
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var localContent = fileDesc.content;
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var localTitle = fileDesc.title;
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var localDiscussionListJSON = fileDesc.discussionListJSON;
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// Local/Remote CRCs
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var localContentCRC = utils.crc32(localContent);
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var localTitleCRC = utils.crc32(localTitle);
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var localDiscussionListCRC = utils.crc32(localDiscussionList);
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var localDiscussionListCRC = utils.crc32(localDiscussionListJSON);
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var remoteContentCRC = utils.crc32(remoteContent);
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var remoteTitleCRC = utils.crc32(remoteTitle);
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var remoteDiscussionListCRC = utils.crc32(remoteDiscussionList);
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var remoteDiscussionListCRC = utils.crc32(remoteDiscussionListJSON);
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// Check content
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var contentChanged = localContent != remoteContent;
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@ -99,7 +162,7 @@ define([
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var titleConflict = titleChanged && localTitleChanged && remoteTitleChanged;
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// Check discussionList
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var discussionListChanged = localDiscussionList != remoteDiscussionList;
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var discussionListChanged = localDiscussionListJSON != remoteDiscussionListJSON;
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var localDiscussionListChanged = syncAttributes.discussionListCRC != localDiscussionListCRC;
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var remoteDiscussionListChanged = syncAttributes.discussionListCRC != remoteDiscussionListCRC;
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var discussionListConflict = discussionListChanged && localDiscussionListChanged && remoteDiscussionListChanged;
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@ -111,15 +174,79 @@ define([
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(titleConflict && syncAttributes.title === undefined) ||
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(discussionListConflict && syncAttributes.discussionList === undefined)
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) {
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fileMgr.createFile(localTitle + " (backup)", localContent);
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fileMgr.createFile(localTitle + " (backup)", localContent, localDiscussionListJSON);
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eventMgr.onMessage('Conflict detected on "' + localTitle + '". A backup has been created locally.');
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}
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else {
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if(contentConflict === true) {
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var patch = diffMatchPatch.patch_make(syncAttributes.content, localContent);
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var updateDiscussionList = remoteDiscussionListChanged;
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var localDiscussionList = fileDesc.discussionList;
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var remoteDiscussionList = JSON.parse(remoteDiscussionListJSON);
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var oldDiscussionList;
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var patch, delta;
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if(contentConflict) {
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// Patch content (line mode)
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var oldContentLines = linesToChars(syncAttributes.content);
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var localContentLines = linesToChars(localContent);
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var remoteContentLines = linesToChars(remoteContent);
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patch = diffMatchPatch.patch_make(oldContentLines, localContentLines);
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remoteContentLines = diffMatchPatch.patch_apply(patch, remoteContentLines)[0];
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var newContent = remoteContentLines.split('').map(function(char) {
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return lineArray[char.charCodeAt(0)];
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}).join('\n');
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// Whether we take the local discussionList into account
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if(localDiscussionListChanged || !remoteDiscussionListChanged) {
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// Move local discussion according to content patch
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var localDiscussionArray = _.values(localDiscussionList);
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fileDesc.newDiscussion && localDiscussionArray.push(fileDesc.newDiscussion);
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updateDiscussionList |= moveComments(localContent, newContent, localDiscussionArray);
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}
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if(remoteDiscussionListChanged) {
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// Move remote discussion according to content patch
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var remoteDiscussionArray = _.values(remoteDiscussionList);
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moveComments(remoteContent, newContent, remoteDiscussionArray);
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if(localDiscussionListChanged) {
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// Patch remote discussionList with local modifications
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oldDiscussionList = JSON.parse(syncAttributes.discussionList);
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delta = jsonDiffPatch.diff(oldDiscussionList, localDiscussionList);
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jsonDiffPatch.patch(remoteDiscussionList, delta);
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}
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}
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else {
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remoteDiscussionList = localDiscussionList;
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}
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remoteContent = newContent;
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}
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else if(discussionListConflict) {
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// Patch remote discussionList with local modifications
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oldDiscussionList = JSON.parse(syncAttributes.discussionList);
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delta = jsonDiffPatch.diff(oldDiscussionList, localDiscussionList);
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jsonDiffPatch.patch(remoteDiscussionList, delta);
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}
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if(titleConflict) {
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// Patch title
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patch = diffMatchPatch.patch_make(syncAttributes.title, localTitle);
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remoteTitle = diffMatchPatch.patch_apply(patch, remoteTitle)[0];
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}
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}
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if(titleChanged && remoteTitleChanged) {
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fileDesc.title = remoteTitle;
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eventMgr.onTitleChanged(fileDesc);
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eventMgr.onMessage('"' + localTitle + '" has been renamed to "' + remoteTitle + '" on ' + this.providerName + '.');
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}
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if(contentChanged && remoteContentChanged === true) {
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if(fileMgr.currentFile === fileDesc) {
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document.getElementById('wmd-input').setValueSilently(remoteContent);
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}
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else {
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fileDesc.content = remoteContent;
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eventMgr.onContentChanged(fileDesc, remoteContent);
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eventMgr.onMessage('"' + remoteTitle + '" has been updated from ' + this.providerName + '.');
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}
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}
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};
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return Provider;
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@ -64,15 +64,23 @@ define([
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});
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var contentObserver;
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var isWatching = false;
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function noWatch(cb) {
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if(isWatching === true) {
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contentObserver.disconnect();
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isWatching = false;
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cb();
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isWatching = true;
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contentObserver.observe(editor.contentElt, {
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childList: true,
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subtree: true,
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characterData: true
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});
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}
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else {
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cb();
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}
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}
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var diffMatchPatch = new diff_match_patch();
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var jsonDiffPatch = jsondiffpatch.create({
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@ -147,10 +155,7 @@ define([
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// Update editor
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noWatch(function() {
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if(previousTextContent != state.content) {
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inputElt.value = state.content;
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fileDesc.content = state.content;
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eventMgr.onContentChanged(fileDesc, state.content);
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previousTextContent = state.content;
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inputElt.setValueSilently(state.content);
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}
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inputElt.setSelectionStartEnd(selectionStart, selectionEnd);
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var discussionListJSON = fileDesc.discussionListJSON;
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@ -501,6 +506,7 @@ define([
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editor.$marginElt = $(editor.marginElt);
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contentObserver = new MutationObserver(checkContentChange);
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isWatching = true;
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contentObserver.observe(editor.contentElt, {
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childList: true,
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subtree: true,
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@ -549,6 +555,18 @@ define([
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}
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});
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inputElt.setValueSilently = function(value) {
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noWatch(function() {
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if(!/\n$/.test(value)) {
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value += '\n';
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}
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inputElt.value = value;
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fileDesc.content = value;
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previousTextContent = value;
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eventMgr.onContentChanged(fileDesc, value);
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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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return selectionStart;
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@ -40,8 +40,16 @@ define([
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});
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};
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var fileDesc;
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markdownSectionParser.onFileSelected = function(fileDescParam) {
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fileDesc = fileDescParam;
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};
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var sectionCounter = 0;
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function parseFileContent(fileDesc, content) {
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function parseFileContent(fileDescParam, content) {
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if(fileDescParam !== fileDesc) {
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return;
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}
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var frontMatter = (fileDesc.frontMatter || {})._frontMatter || '';
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var text = content.substring(frontMatter.length);
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var tmpText = text + "\n\n";
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@ -18,7 +18,10 @@ define([
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var regex = /^(\s*-{3}\s*\n([\w\W]+?)\n\s*-{3}\s*?\n)?([\w\W]*)$/;
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function parseFrontMatter(fileDesc, content) {
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function parseFrontMatter(fileDescParam, content) {
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if(fileDescParam !== fileDesc) {
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return;
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}
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var results = regex.exec(content);
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var yaml = results[2];
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@ -671,10 +671,10 @@ define([
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];
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utils.crc32 = function(str) {
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var n = 0, crc = -1;
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for ( var i = 0; i < str.length; i++) {
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n = (crc ^ str.charCodeAt(i)) & 0xFF;
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str.split('').forEach(function(char) {
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n = (crc ^ char.charCodeAt(0)) & 0xFF;
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crc = (crc >>> 8) ^ mHash[n];
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}
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});
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crc = crc ^ (-1);
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if(crc < 0) {
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crc = 0xFFFFFFFF + crc + 1;
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@ -688,7 +688,7 @@ define([
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cb();
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}
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console.log('Run 10,000 times in ' + (Date.now() - startTime) + 'ms');
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}
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};
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return utils;
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});
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