10a7126d9b
Previously, there was a race condition in which erasing a draft comment could occur prior to the updated version of the comment getting saved. When this happened, if the user replied to the same thread, their old draft would be pre-populated in the new reply. This change cancels the 'store' debouncer when erasing a draft comment, to avoid this race condition. Bug: Issue 6141 Change-Id: I11a646acf01b1ac986c587e1e8fdb4fd7efc25b7
467 lines
12 KiB
JavaScript
467 lines
12 KiB
JavaScript
// Copyright (C) 2016 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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(function() {
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'use strict';
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var STORAGE_DEBOUNCE_INTERVAL = 400;
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Polymer({
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is: 'gr-diff-comment',
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/**
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* Fired when the create fix comment action is triggered.
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*
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* @event create-fix-comment
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*/
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/**
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* Fired when this comment is discarded.
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*
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* @event comment-discard
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*/
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/**
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* Fired when this comment is saved.
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*
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* @event comment-save
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*/
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/**
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* Fired when this comment is updated.
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*
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* @event comment-update
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*/
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/**
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* @event comment-mouse-over
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*/
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/**
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* @event comment-mouse-out
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*/
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properties: {
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changeNum: String,
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comment: {
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type: Object,
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notify: true,
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observer: '_commentChanged',
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},
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isRobotComment: {
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type: Boolean,
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value: false,
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reflectToAttribute: true,
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},
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disabled: {
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type: Boolean,
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value: false,
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reflectToAttribute: true,
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},
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draft: {
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type: Boolean,
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value: false,
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observer: '_draftChanged',
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},
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editing: {
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type: Boolean,
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value: false,
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observer: '_editingChanged',
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},
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hasChildren: Boolean,
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patchNum: String,
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showActions: Boolean,
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_showHumanActions: Boolean,
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_showRobotActions: Boolean,
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collapsed: {
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type: Boolean,
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value: true,
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observer: '_toggleCollapseClass',
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},
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projectConfig: Object,
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robotButtonDisabled: Boolean,
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_xhrPromise: Object, // Used for testing.
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_messageText: {
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type: String,
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value: '',
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observer: '_messageTextChanged',
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},
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commentSide: String,
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resolved: {
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type: Boolean,
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observer: '_toggleResolved',
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},
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},
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observers: [
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'_commentMessageChanged(comment.message)',
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'_loadLocalDraft(changeNum, patchNum, comment)',
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'_isRobotComment(comment)',
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'_calculateActionstoShow(showActions, isRobotComment)',
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],
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attached: function() {
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if (this.editing) {
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this.collapsed = false;
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} else if (this.comment) {
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this.collapsed = this.comment.collapsed;
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}
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},
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detached: function() {
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this.cancelDebouncer('fire-update');
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},
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_computeShowHideText: function(collapsed) {
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return collapsed ? '◀' : '▼';
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},
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_calculateActionstoShow: function(showActions, isRobotComment) {
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this._showHumanActions = showActions && !isRobotComment;
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this._showRobotActions = showActions && isRobotComment;
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},
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_isRobotComment: function(comment) {
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this.isRobotComment = !!comment.robot_id;
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},
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isOnParent: function() {
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return this.side === 'PARENT';
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},
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save: function() {
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this.comment.message = this._messageText;
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this.disabled = true;
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this._eraseDraftComment();
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this._xhrPromise = this._saveDraft(this.comment).then(function(response) {
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this.disabled = false;
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if (!response.ok) { return response; }
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return this.$.restAPI.getResponseObject(response).then(function(obj) {
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var comment = obj;
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comment.__draft = true;
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// Maintain the ephemeral draft ID for identification by other
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// elements.
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if (this.comment.__draftID) {
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comment.__draftID = this.comment.__draftID;
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}
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comment.__commentSide = this.commentSide;
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this.comment = comment;
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this.editing = false;
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this._fireSave();
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return obj;
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}.bind(this));
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}.bind(this)).catch(function(err) {
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this.disabled = false;
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throw err;
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}.bind(this));
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},
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_eraseDraftComment: function() {
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// Prevents a race condition in which removing the draft comment occurs
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// prior to it being saved.
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this.cancelDebouncer('store');
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this.$.storage.eraseDraftComment({
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changeNum: this.changeNum,
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patchNum: this._getPatchNum(),
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path: this.comment.path,
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line: this.comment.line,
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range: this.comment.range,
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});
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},
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_commentChanged: function(comment) {
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this.editing = !!comment.__editing;
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this.resolved = !comment.unresolved;
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if (this.editing) { // It's a new draft/reply, notify.
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this._fireUpdate();
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}
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},
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_getEventPayload: function(opt_mixin) {
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var payload = {
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comment: this.comment,
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patchNum: this.patchNum,
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};
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for (var k in opt_mixin) {
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payload[k] = opt_mixin[k];
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}
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return payload;
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},
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_fireSave: function() {
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this.fire('comment-save', this._getEventPayload());
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},
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_fireUpdate: function() {
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this.debounce('fire-update', function() {
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this.fire('comment-update', this._getEventPayload());
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});
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},
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_draftChanged: function(draft) {
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this.$.container.classList.toggle('draft', draft);
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},
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_editingChanged: function(editing, previousValue) {
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this.$.container.classList.toggle('editing', editing);
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if (editing) {
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var textarea = this.$.editTextarea.textarea;
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// Put the cursor at the end always.
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textarea.selectionStart = textarea.value.length;
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textarea.selectionEnd = textarea.selectionStart;
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this.async(function() {
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textarea.focus();
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}.bind(this));
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}
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if (this.comment && this.comment.id) {
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this.$$('.cancel').hidden = !editing;
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}
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if (this.comment) {
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this.comment.__editing = this.editing;
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}
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if (editing != !!previousValue) {
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// To prevent event firing on comment creation.
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this._fireUpdate();
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}
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},
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_computeLinkToComment: function(comment) {
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return '#' + comment.line;
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},
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_computeSaveDisabled: function(draft) {
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return draft == null || draft.trim() == '';
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},
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_handleTextareaKeydown: function(e) {
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switch (e.keyCode) {
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case 13: // 'enter'
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if (this._messageText.length !== 0 && (e.metaKey || e.ctrlKey)) {
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this._handleSave(e);
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}
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break;
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case 27: // 'esc'
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if (this._messageText.length === 0) {
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this._handleCancel(e);
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}
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break;
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case 83: // 's'
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if (this._messageText.length !== 0 && e.ctrlKey) {
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this._handleSave(e);
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}
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break;
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}
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},
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_handleToggleCollapsed: function() {
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this.collapsed = !this.collapsed;
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},
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_toggleCollapseClass: function(collapsed) {
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if (collapsed) {
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this.$.container.classList.add('collapsed');
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} else {
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this.$.container.classList.remove('collapsed');
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}
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},
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_commentMessageChanged: function(message) {
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this._messageText = message || '';
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},
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_messageTextChanged: function(newValue, oldValue) {
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if (!this.comment || (this.comment && this.comment.id)) { return; }
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// Keep comment.message in sync so that gr-diff-comment-thread is aware
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// of the current message in the case that another comment is deleted.
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this.comment.message = this._messageText || '';
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this.debounce('store', function() {
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var message = this._messageText;
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var commentLocation = {
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changeNum: this.changeNum,
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patchNum: this._getPatchNum(),
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path: this.comment.path,
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line: this.comment.line,
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range: this.comment.range,
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};
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if ((!this._messageText || !this._messageText.length) && oldValue) {
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// If the draft has been modified to be empty, then erase the storage
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// entry.
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this.$.storage.eraseDraftComment(commentLocation);
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} else {
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this.$.storage.setDraftComment(commentLocation, message);
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}
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this._fireUpdate();
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}, STORAGE_DEBOUNCE_INTERVAL);
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},
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_handleLinkTap: function(e) {
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e.preventDefault();
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var hash = this._computeLinkToComment(this.comment);
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// Don't add the hash to the window history if it's already there.
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// Otherwise you mess up expected back button behavior.
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if (window.location.hash == hash) { return; }
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// Change the URL but don’t trigger a nav event. Otherwise it will
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// reload the page.
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page.show(window.location.pathname + hash, null, false);
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},
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_handleReply: function(e) {
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e.preventDefault();
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this.fire('create-reply-comment', this._getEventPayload(),
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{bubbles: false});
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},
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_handleQuote: function(e) {
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e.preventDefault();
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this.fire('create-reply-comment', this._getEventPayload({quote: true}),
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{bubbles: false});
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},
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_handleFix: function(e) {
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e.preventDefault();
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this.fire('create-fix-comment', this._getEventPayload({quote: true}),
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{bubbles: false});
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},
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_handleAck: function(e) {
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e.preventDefault();
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this.fire('create-ack-comment', this._getEventPayload(),
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{bubbles: false});
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},
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_handleDone: function(e) {
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e.preventDefault();
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this.fire('create-done-comment', this._getEventPayload(),
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{bubbles: false});
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},
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_handleEdit: function(e) {
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e.preventDefault();
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this._messageText = this.comment.message;
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this.editing = true;
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},
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_handleSave: function(e) {
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e.preventDefault();
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this.set('comment.__editing', false);
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this.save();
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},
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_handleCancel: function(e) {
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e.preventDefault();
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if (!this.comment.message ||
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this.comment.message.trim().length === 0) {
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this._fireDiscard();
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return;
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}
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this._messageText = this.comment.message;
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this.editing = false;
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},
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_fireDiscard: function() {
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this.cancelDebouncer('fire-update');
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this.fire('comment-discard', this._getEventPayload());
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},
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_handleDiscard: function(e) {
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e.preventDefault();
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if (!this.comment.__draft) {
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throw Error('Cannot discard a non-draft comment.');
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}
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this.editing = false;
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this.disabled = true;
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this._eraseDraftComment();
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if (!this.comment.id) {
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this.disabled = false;
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this._fireDiscard();
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return;
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}
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this._xhrPromise = this._deleteDraft(this.comment).then(
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function(response) {
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this.disabled = false;
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if (!response.ok) { return response; }
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this._fireDiscard();
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}.bind(this)).catch(function(err) {
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this.disabled = false;
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throw err;
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}.bind(this));
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},
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_saveDraft: function(draft) {
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return this.$.restAPI.saveDiffDraft(this.changeNum, this.patchNum, draft);
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},
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_deleteDraft: function(draft) {
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return this.$.restAPI.deleteDiffDraft(this.changeNum, this.patchNum,
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draft);
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},
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_getPatchNum: function() {
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return this.isOnParent() ? 'PARENT' : this.patchNum;
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},
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_loadLocalDraft: function(changeNum, patchNum, comment) {
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// Only apply local drafts to comments that haven't been saved
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// remotely, and haven't been given a default message already.
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//
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// Don't get local draft if there is another comment that is currently
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// in an editing state.
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if (!comment || comment.id || comment.message || comment.__otherEditing) {
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delete comment.__otherEditing;
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return;
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}
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var draft = this.$.storage.getDraftComment({
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changeNum: changeNum,
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patchNum: this._getPatchNum(),
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path: comment.path,
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line: comment.line,
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range: comment.range,
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});
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if (draft) {
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this.set('comment.message', draft.message);
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}
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},
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_handleMouseEnter: function(e) {
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this.fire('comment-mouse-over', this._getEventPayload());
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},
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_handleMouseLeave: function(e) {
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this.fire('comment-mouse-out', this._getEventPayload());
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},
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_handleToggleResolved: function() {
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this.resolved = !this.resolved;
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},
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_toggleResolved: function(resolved) {
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this.comment.unresolved = !resolved;
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this.fire('comment-update', this._getEventPayload());
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},
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});
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})();
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