diff options
Diffstat (limited to 'infrastructure/ace/www/changesettracker.js')
| -rw-r--r-- | infrastructure/ace/www/changesettracker.js | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/infrastructure/ace/www/changesettracker.js b/infrastructure/ace/www/changesettracker.js deleted file mode 100644 index d6fe018..0000000 --- a/infrastructure/ace/www/changesettracker.js +++ /dev/null @@ -1,170 +0,0 @@ -/** - * Copyright 2009 Google Inc. - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS-IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - - -function makeChangesetTracker(scheduler, apool, aceCallbacksProvider) { - - // latest official text from server - var baseAText = Changeset.makeAText("\n"); - // changes applied to baseText that have been submitted - var submittedChangeset = null; - // changes applied to submittedChangeset since it was prepared - var userChangeset = Changeset.identity(1); - // is the changesetTracker enabled - var tracking = false; - // stack state flag so that when we change the rep we don't - // handle the notification recursively. When setting, always - // unset in a "finally" block. When set to true, the setter - // takes change of userChangeset. - var applyingNonUserChanges = false; - - var changeCallback = null; - - var changeCallbackTimeout = null; - function setChangeCallbackTimeout() { - // can call this multiple times per call-stack, because - // we only schedule a call to changeCallback if it exists - // and if there isn't a timeout already scheduled. - if (changeCallback && changeCallbackTimeout === null) { - changeCallbackTimeout = scheduler.setTimeout(function() { - try { - changeCallback(); - } - finally { - changeCallbackTimeout = null; - } - }, 0); - } - } - - var self; - return self = { - isTracking: function() { return tracking; }, - setBaseText: function(text) { - self.setBaseAttributedText(Changeset.makeAText(text), null); - }, - setBaseAttributedText: function(atext, apoolJsonObj) { - aceCallbacksProvider.withCallbacks("setBaseText", function(callbacks) { - tracking = true; - baseAText = Changeset.cloneAText(atext); - if (apoolJsonObj) { - var wireApool = (new AttribPool()).fromJsonable(apoolJsonObj); - baseAText.attribs = Changeset.moveOpsToNewPool(baseAText.attribs, wireApool, apool); - } - submittedChangeset = null; - userChangeset = Changeset.identity(atext.text.length); - applyingNonUserChanges = true; - try { - callbacks.setDocumentAttributedText(atext); - } - finally { - applyingNonUserChanges = false; - } - }); - }, - composeUserChangeset: function(c) { - if (! tracking) return; - if (applyingNonUserChanges) return; - if (Changeset.isIdentity(c)) return; - userChangeset = Changeset.compose(userChangeset, c, apool); - - setChangeCallbackTimeout(); - }, - applyChangesToBase: function (c, optAuthor, apoolJsonObj) { - if (! tracking) return; - - aceCallbacksProvider.withCallbacks("applyChangesToBase", function(callbacks) { - - if (apoolJsonObj) { - var wireApool = (new AttribPool()).fromJsonable(apoolJsonObj); - c = Changeset.moveOpsToNewPool(c, wireApool, apool); - } - - baseAText = Changeset.applyToAText(c, baseAText, apool); - - var c2 = c; - if (submittedChangeset) { - var oldSubmittedChangeset = submittedChangeset; - submittedChangeset = Changeset.follow(c, oldSubmittedChangeset, false, apool); - c2 = Changeset.follow(oldSubmittedChangeset, c, true, apool); - } - - var preferInsertingAfterUserChanges = true; - var oldUserChangeset = userChangeset; - userChangeset = Changeset.follow(c2, oldUserChangeset, preferInsertingAfterUserChanges, apool); - var postChange = - Changeset.follow(oldUserChangeset, c2, ! preferInsertingAfterUserChanges, apool); - - var preferInsertionAfterCaret = true; //(optAuthor && optAuthor > thisAuthor); - - applyingNonUserChanges = true; - try { - callbacks.applyChangesetToDocument(postChange, preferInsertionAfterCaret); - } - finally { - applyingNonUserChanges = false; - } - }); - }, - prepareUserChangeset: function() { - // If there are user changes to submit, 'changeset' will be the - // changeset, else it will be null. - var toSubmit; - if (submittedChangeset) { - // submission must have been canceled, prepare new changeset - // that includes old submittedChangeset - toSubmit = Changeset.compose(submittedChangeset, userChangeset, apool); - } - else { - if (Changeset.isIdentity(userChangeset)) toSubmit = null; - else toSubmit = userChangeset; - } - - var cs = null; - if (toSubmit) { - submittedChangeset = toSubmit; - userChangeset = Changeset.identity(Changeset.newLen(toSubmit)); - - cs = toSubmit; - } - var wireApool = null; - if (cs) { - var forWire = Changeset.prepareForWire(cs, apool); - wireApool = forWire.pool.toJsonable(); - cs = forWire.translated; - } - - var data = { changeset: cs, apool: wireApool }; - return data; - }, - applyPreparedChangesetToBase: function() { - if (! submittedChangeset) { - // violation of protocol; use prepareUserChangeset first - throw new Error("applySubmittedChangesToBase: no submitted changes to apply"); - } - //bumpDebug("applying committed changeset: "+submittedChangeset.encodeToString(false)); - baseAText = Changeset.applyToAText(submittedChangeset, baseAText, apool); - submittedChangeset = null; - }, - setUserChangeNotificationCallback: function (callback) { - changeCallback = callback; - }, - hasUncommittedChanges: function() { - return !!(submittedChangeset || (! Changeset.isIdentity(userChangeset))); - } - }; - -} |