forked from facebookarchive/IndexedDB-polyfill
/
indexedDB.polyfill.js
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/
indexedDB.polyfill.js
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/*
Copyright 2012 Facebook 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.
*/
/* Compiled File */
(function (window, undefined) {
var indexedDB = window.indexedDB = window.indexedDB || window.mozIndexedDB ||
window.webkitIndexedDB || window.msIndexedDB || { polyfill : true };
if (!indexedDB.polyfill) return;
console.warn('This browser most likely does not support IndexedDB API. Initializing custom IndexedDB' +
' implementation using Web SQL Database API.');
// Configuration
indexedDB.SCHEMA_TABLE = "__IndexedDBSchemaInfo__";
indexedDB.DB_PREFIX = "__IndexedDB__";
//indexedDB.CURSOR_CHUNK_SIZE = 10;
// Data types
indexedDB.DOMStringList = function () { };
indexedDB.DOMStringList.prototype = [];
indexedDB.DOMStringList.constructor = indexedDB.DOMStringList;
indexedDB.DOMStringList.prototype.contains = function (str) {
return this.indexOf(str) >= 0;
};
// Util
var util = indexedDB.util = new (function () {
this.async = function (fn, async) {
if (async == null || async) w_setTimeout(fn, 0);
else fn();
};
this.error = function (name, message, innerError) {
return {
name : name,
message : message,
inner : innerError
}
};
this.event = function (type, target) {
return {
type : type,
target : target,
currentTarget : target,
preventDefault : function () { },
stopPropagation : function () { }
};
};
this.fireErrorEvent = function (request, error) {
request.error = error;
if (request.onerror == null) return;
request.onerror(this.event("error", request));
};
this.fireSuccessEvent = function (request, result) {
if (arguments.length === 2) request.result = result;
if (request.onsuccess == null) return;
request.onsuccess(this.event("success", request));
};
this.validateKeyPath = function (keyPath) {
if (keyPath === "") return "";
if (keyPath == null) return null;
var r = /^([^\d\W]\w*\.)+$/i;
if (keyPath instanceof Array) {
var i = keyPath.length;
if (i == 0) throw this.error("SyntaxError");
while (i--) {
if (!r.test(keyPath[i] + ".")) throw this.error("SyntaxError");
}
return keyPath;
}
if (!r.test(keyPath + ".")) throw this.error("SyntaxError");
return keyPath;
};
this.arrayRemove = function (array, item) {
var i = array.indexOf(item);
if (i > -1) array.splice(i, 1);
};
this.indexTable = function (objectStoreName, name) {
if (arguments.length == 1 && (objectStoreName instanceof this.IDBIndex)) {
name = objectStoreName.name;
objectStoreName = objectStoreName.objectStore.name;
}
return indexedDB.DB_PREFIX + "Index__" + objectStoreName + "__" + name;
};
this.extractKeyFromValue = function (keyPath, value) {
var key;
if (keyPath instanceof Array) {
key = [];
for (var i = 0; i < keyPath.length; i++) {
key.push(this.extractKeyFromValue(keyPath[i], value));
}
}
else {
if (keyPath === "") return value;
key = value;
var paths = keyPath.split(".");
for (var i = 0; i < paths.length; i++) {
if (key == null) return null;
key = key[paths[i]];
}
}
return key;
};
this.validateKeyOrRange = function (key) {
if (key == null) return null;
if (!(key instanceof this.IDBKeyRange)) {
key = this.encodeKey(key);
if (key === null) throw this.error("DataError");
}
return key;
};
this.wait = function (conditionFunc, bodyFunc, async) {
var me = this;
this.async(function () {
if (conditionFunc()) bodyFunc();
else {
w_setTimeout(function () {
me.wait(conditionFunc, bodyFunc);
}, 10);
}
},
async);
};
});
// Classes
var IDBVersionChangeEvent = window.IDBVersionChangeEvent = indexedDB.util.IDBVersionChangeEvent =
function (type, target, oldVersion, newVersion) {
this.type = type;
this.target = this.currentTarget = target;
this.oldVersion = oldVersion;
this.newVersion = newVersion;
};
var IDBDatabaseException = window.IDBDatabaseException = indexedDB.util.IDBDatabaseException =
{
ABORT_ERR : 8,
CONSTRAINT_ERR : 4,
DATA_ERR : 5,
NON_TRANSIENT_ERR : 2,
NOT_ALLOWED_ERR : 6,
NOT_FOUND_ERR : 3,
QUOTA_ERR : 11,
READ_ONLY_ERR : 9,
TIMEOUT_ERR : 10,
TRANSACTION_INACTIVE_ERR : 7,
UNKNOWN_ERR : 1,
VERSION_ERR : 12
};
// Cached
var w_setTimeout = window.setTimeout;
/* IDBCursor */
var IDBCursor = util.IDBCursor = window.IDBCursor = function (source, direction, request) {
this.source = source;
this.direction = direction || IDBCursor.NEXT;
this.key = null; // position
this.primaryKey = null; // effective key
this._request = request;
this._range = null;
this._gotValue = true;
this._effectiveKeyEncoded = null;
};
IDBCursor.prototype.update = function (value) {
var objectStore = getObjectStore(this);
IDBTransaction._assertNotReadOnly(objectStore.transaction);
if (!(this instanceof util.IDBCursorWithValue) || !this._gotValue) throw util.error("InvalidStateError");
if (objectStore.keyPath != null) {
var key = util.extractKeyFromValue(objectStore.keyPath, value);
if (key != this.primaryKey) throw util.error("DataError");
}
var request = new util.IDBRequest(this);
var me = this;
objectStore.transaction._queueOperation(function (sqlTx, nextRequestCallback) {
objectStore._insertOrReplaceRecord(
{
request : request,
sqlTx : sqlTx,
nextRequestCallback : nextRequestCallback,
noOverwrite : false,
value : value,
encodedKey : me._effectiveKeyEncoded
});
});
return request;
};
IDBCursor.prototype.advance = function (count) {
count = parseInt(count);
if (isNaN(count) || count <= 0) throw util.error("TypeError");
advanceOrContinue(this, count, null);
};
IDBCursor.prototype.continue = function (key) {
advanceOrContinue(this, 1, key);
};
IDBCursor.prototype.delete = function () {
var objectStore = getObjectStore(this);
IDBTransaction._assertNotReadOnly(objectStore.transaction);
if (!(this instanceof util.IDBCursorWithValue) || !this._gotValue) throw util.error("InvalidStateError");
var request = new util.IDBRequest(this);
var me = this;
objectStore.transaction._queueOperation(function (sqlTx, nextRequestCallback) {
objectStore._deleteRecord(sqlTx, me._effectiveKeyEncoded,
function () {
util.fireSuccessEvent(request);
nextRequestCallback();
},
function (_, error) {
util.fireErrorEvent(request, error);
nextRequestCallback();
});
});
return request;
};
// Internal methods
function advanceOrContinue(me, count, key) {
if (!me._gotValue) throw util.error("InvalidStateError");
me._gotValue = false;
var filter = util.IDBKeyRange._clone(me._range);
filter.count = count;
var isSourceIndex = me.source instanceof util.IDBIndex;
var position = me.key;
var noDuplicate = [IDBCursor.PREV_NO_DUPLICATE, IDBCursor.NEXT_NO_DUPLICATE].indexOf(me.direction) >= 0;
if (key != null) {
if (isDesc(me)) {
if ((isSourceIndex && key > position) || key >= position) throw util.error("DataError");
filter.upper = key;
filter.upperOpen = false;
}
else {
if ((isSourceIndex && key < position) || key <= position) throw util.error("DataError");
filter.lower = key;
filter.lowerOpen = false;
}
}
else if (position != null) {
var open = !isSourceIndex || noDuplicate;
if (isDesc(me)) {
filter.upper = position;
filter.upperOpen = open;
}
else {
filter.lower = position;
filter.lowerOpen = open;
}
}
if (isSourceIndex) iterateIndexCursor(me, filter);
else iterateCursor(me, filter);
}
function iterateCursor(me, filter) {
var tx = me.source.transaction;
me._request.readyState = util.IDBRequest.LOADING;
tx._queueOperation(function (sqlTx, nextRequestCallback) {
var sql = ["SELECT hex(key) 'key', value FROM [" + me.source.name + "]"];
var where = [];
var args = [];
if (filter.lower != null) {
where.push("(key >" + (filter.lowerOpen ? "" : "=") + " X'" + util.encodeKey(filter.lower) + "')");
}
if (filter.upper != null) {
where.push("(key <" + (filter.upperOpen ? "" : "=") + " X'" + util.encodeKey(filter.upper) + "')");
}
if (where.length > 0) {
sql.push("WHERE", where.join(" AND "))
}
sql.push("ORDER BY key" + (isDesc(me) ? " DESC" : ""));
sql.push("LIMIT", filter.count);
sqlTx.executeSql(sql.join(" "), args,
function (tx, results) {
var request = me._request;
request.readyState = util.IDBRequest.DONE;
if (results.rows.length < filter.count) {
me.key = me.primaryKey = me._effectiveKeyEncoded = undefined;
if (typeof me.value !== "undefined") me.value = undefined;
request.result = null;
}
else {
var found = results.rows.item(filter.count - 1);
me._effectiveKeyEncoded = found.key;
me.key = me.primaryKey = util.decodeKey(found.key);
if (typeof me.value !== "undefined") me.value = w_JSON.parse(found.value);
me._gotValue = true;
request.result = me;
}
util.fireSuccessEvent(request);
nextRequestCallback();
},
function (tx, error) {
util.fireErrorEvent(me._request, error);
nextRequestCallback();
});
});
}
function iterateIndexCursor(me, filter) {
var tx = me.source.objectStore.transaction;
me._request.readyState = util.IDBRequest.LOADING;
tx._queueOperation(function (sqlTx, nextRequestCallback) {
var withValue = me instanceof IDBCursorWithValue;
var desc = isDesc(me);
var objectStoreName = me.source.objectStore.name;
var tableName = util.indexTable(objectStoreName, me.source.name);
var sql = ["SELECT hex(i.key) 'key', hex(i.primaryKey) 'primaryKey'" + (withValue ? ", t.value" : ""),
"FROM [" + tableName + "] as i"];
if (withValue) {
sql.push("LEFT JOIN [" + objectStoreName + "] as t ON t.Id = i.recordId");
}
var where = [], args = [], encoded;
if (filter.lower != null) {
encoded = util.encodeKey(filter.lower);
if (filter.lowerOpen) {
where.push("(i.key > X'" + encoded + "')");
}
else {
if (me._effectiveKeyEncoded == null || desc) {
where.push("(i.key >= X'" + encoded + "')");
}
else {
where.push("((i.key > X'" + encoded + "') OR (i.key = X'" + encoded +
"' AND i.primaryKey > X'" + me._effectiveKeyEncoded + "'))");
}
}
}
if (filter.upper != null) {
encoded = util.encodeKey(filter.upper);
if (filter.upperOpen) {
where.push("(i.key < X'" + encoded + "')");
}
else {
if (me._effectiveKeyEncoded == null || !desc) {
where.push("(i.key <= X'" + encoded + "')");
}
else {
where.push("((i.key < X'" + encoded + "') OR (i.key = X'" + encoded +
"' AND i.primaryKey < X'" + me._effectiveKeyEncoded + "'))");
}
}
}
if (where.length > 0) {
sql.push("WHERE", where.join(" AND "))
}
var sDesc = desc ? " DESC" : "";
sql.push("ORDER BY i.key" + sDesc + ", i.primaryKey" + sDesc);
sql.push("LIMIT", filter.count);
sqlTx.executeSql(sql.join(" "), args,
function (sqlTx, results) {
var request = me._request;
request.readyState = util.IDBRequest.DONE;
if (results.rows.length < filter.count) {
me.key = me.primaryKey = me._effectiveKeyEncoded = undefined;
if (typeof me.value !== "undefined") me.value = undefined;
request.result = null;
}
else {
var found = results.rows.item(filter.count - 1);
me.key = util.decodeKey(found.key);
me._effectiveKeyEncoded = found.primaryKey;
me.primaryKey = util.decodeKey(found.primaryKey);
if (typeof me.value !== "undefined") me.value = w_JSON.parse(found.value);
me._gotValue = true;
request.result = me;
}
util.fireSuccessEvent(request);
nextRequestCallback();
},
function (_, error) {
util.fireErrorEvent(me._request, error);
nextRequestCallback();
});
});
}
// Utils
var w_JSON = window.JSON;
function isDesc(cursor) {
return [IDBCursor.PREV, IDBCursor.PREV_NO_DUPLICATE].indexOf(cursor.direction) >= 0;
}
function getObjectStore(cursor) {
if (cursor.source instanceof util.IDBObjectStore) {
return cursor.source;
}
else if (cursor.source instanceof util.IDBIndex) {
return cursor.source.objectStore;
}
return null;
}
IDBCursor.NEXT = "next";
IDBCursor.NEXT_NO_DUPLICATE = "nextunique";
IDBCursor.PREV = "prev";
IDBCursor.PREV_NO_DUPLICATE = "prevunique";
var IDBCursorWithValue = function (source, direction, request) {
IDBCursor.apply(this, arguments);
this.value = null;
};
IDBCursorWithValue.prototype = new IDBCursor();
IDBCursorWithValue.prototype.constructor = IDBCursorWithValue;
util.IDBCursorWithValue = window.IDBCursorWithValue = IDBCursorWithValue;
/* IDBDatabase */
var IDBDatabase = util.IDBDatabase = window.IDBDatabase = function (name, webdb) {
this.name = name;
this.version = null;
this.objectStoreNames = new indexedDB.DOMStringList();
this.onabort = null;
this.onerror = null;
this.onversionchange = null;
this._webdb = webdb;
this._objectStores = null; // TODO: ObjectStores are specific to IDBTransaction
this._closePending = false;
this._activeTransactionCounter = 0;
this._closed = false;
};
IDBDatabase.prototype.createObjectStore = function (name, optionalParameters) {
IDBTransaction._assertVersionChange(this._versionChangeTransaction);
// Validate existence of ObjectStore
if (this.objectStoreNames.indexOf(name) >= 0) {
throw util.error("ConstraintError");
}
var params = optionalParameters || { };
var keyPath = util.validateKeyPath(params.keyPath);
var autoIncrement = params.autoIncrement && params.autoIncrement != false || false;
if (autoIncrement && (keyPath === "" || (keyPath instanceof Array))) {
throw util.error("InvalidAccessError");
}
return createObjectStore(this, name, keyPath, autoIncrement);
};
IDBDatabase.prototype.deleteObjectStore = function (name) {
var tx = this._versionChangeTransaction;
IDBTransaction._assertVersionChange(tx);
if (this.objectStoreNames.indexOf(name) == -1) {
throw util.error("NotFoundError");
}
util.arrayRemove(this.objectStoreNames, name);
var objectStore = this._objectStores[name];
delete this._objectStores[name];
var me = this;
var errorCallback = function () {
me.objectStoreNames.push(name);
me._objectStores[name] = objectStore;
};
tx._queueOperation(function (sqlTx, nextRequestCallback) {
sqlTx.executeSql("DROP TABLE [" + name + "]", null, null, errorCallback);
sqlTx.executeSql("DELETE FROM " + indexedDB.SCHEMA_TABLE + " WHERE type = 'table' AND name = ?",
[name], null, errorCallback);
nextRequestCallback();
});
};
IDBDatabase.prototype.transaction = function (storeNames, mode) {
// TODO: 4.2.1. throw InvalidStateError if a transaction being creating within transaction callback
if (storeNames instanceof Array || storeNames == null) {
if (storeNames.length == 0) throw util.error("InvalidAccessError");
}
else {
storeNames = [storeNames.toString()];
}
for (var i = 0; i < storeNames.length; i++) {
if (!this.objectStoreNames.contains(storeNames[i])) throw util.error("NotFoundError");
}
if (this._closePending || this._closed) throw util.error("InvalidStateError");
return new util.IDBTransaction(this, storeNames, mode || util.IDBTransaction.READ_ONLY);
};
IDBDatabase.prototype.close = function () {
this._closePending = true;
needDBClose(this);
};
IDBDatabase.prototype._loadObjectStores = function (sqlTx, successCallback, errorCallback) {
var me = this;
sqlTx.executeSql("SELECT * FROM " + indexedDB.SCHEMA_TABLE +
" ORDER BY type DESC", null,
function (sqlTx, resultSet) {
me._objectStores = { };
var item, objectStore;
for (var i = 0; i < resultSet.rows.length; i++) {
item = resultSet.rows.item(i);
if (item.type == "table") {
me.objectStoreNames.push(item.name);
objectStore = new util.IDBObjectStore(item.name, w_JSON.parse(item.keyPath), item.autoInc);
objectStore._metaId = item.id;
me._objectStores[item.name] = objectStore;
}
else if (item.type == "index") {
for (var name in me._objectStores) {
objectStore = me._objectStores[name];
if (objectStore._metaId == item.tableId) break;
}
objectStore.indexNames.push(item.name);
objectStore._indexes[item.name] = new util.IDBIndex(objectStore,
item.name, item.keyPath, item.unique, item.multiEntry)
}
}
if (successCallback) successCallback();
},
function (_, error) {
if (errorCallback) errorCallback(error);
});
};
IDBDatabase.prototype._transactionCompleted = function () {
this._activeTransactionCounter--;
needDBClose(this);
};
// Utils
var w_JSON = window.JSON;
function createObjectStore(me, name, keyPath, autoIncrement) {
var objectStore = new util.IDBObjectStore(name, keyPath, autoIncrement, me._versionChangeTransaction);
me.objectStoreNames.push(name);
me._objectStores[name] = objectStore;
var errorCallback = function () {
util.arrayRemove(me.objectStoreNames, name);
delete me._objectStores[name];
};
me._versionChangeTransaction._queueOperation(function (sqlTx, nextRequestCallback) {
sqlTx.executeSql("CREATE TABLE [" + name + "] (id INTEGER PRIMARY KEY AUTOINCREMENT, " +
"key BLOB UNIQUE, value BLOB)", null, null, errorCallback);
sqlTx.executeSql("CREATE INDEX INDEX_" + name + "_key ON [" + name + "] (key)", null, null, errorCallback);
sqlTx.executeSql("INSERT INTO " + indexedDB.SCHEMA_TABLE +
" (type, name, keyPath, autoInc) VALUES ('table', ?, ?, ?)",
[name, w_JSON.stringify(keyPath), autoIncrement ? 1 : 0],
function (sqlTx, results) {
objectStore._metaId = results.insertId;
},
errorCallback);
nextRequestCallback();
});
return objectStore;
}
function needDBClose(me) {
if (me._closePending && me._activeTransactionCounter == 0) {
me._closePending = false;
me._closed = true;
indexedDB._notifyConnectionClosed(me);
}
}
/* IDBFactory */
var origin = { };
indexedDB.open = function (name, version) {
if (arguments.length == 2 && version == undefined) throw util.error("TypeError");
if (version !== undefined) {
version = parseInt(version.valueOf());
if (isNaN(version) || version <= 0)
throw util.error("TypeError", "The method parameter is missing or invalid.");
}
var request = new util.IDBOpenDBRequest(null);
util.async(function () {
request.readyState = util.IDBRequest.DONE;
runStepsForOpeningDB(name, version, request);
});
return request;
};
function runStepsForOpeningDB(name, version, request) {
var sqldb = util.openDatabase(name);
if (sqldb.version !== "" && isNaN(parseInt(sqldb.version))) // sqldb.version is corrupt
{
util.fireErrorEvent(request, util.error("VersionError"));
return;
}
var connection = new util.IDBDatabase(name, sqldb);
var oldVersion = sqldb.version == "" ? 0 : parseInt(sqldb.version);
connection.version = (version === undefined) ? (oldVersion === 0 ? 1 : oldVersion) : version;
var database = getOriginDatabase(name);
util.wait(function () {
// www.w3.org/TR/IndexedDB 4.1.3
if (database.deletePending) return false;
for (var i = 0; i < database.connections.length; i++) {
if (database.connections[i]._versionChangeTransaction != null) return false;
}
return true;
},
function () {
if (oldVersion < connection.version) {
runStepsForVersionChangeTransaction(request, connection, oldVersion);
}
else if (oldVersion == connection.version) {
openVersionMatch(request, connection, sqldb);
}
else {
util.fireErrorEvent(request, util.error("VersionError"));
}
});
}
function runStepsForVersionChangeTransaction(request, connection, oldVersion) {
fireVersionChangeEvent(request, connection.name, oldVersion, connection.version);
util.wait(function () {
return getOriginDatabase(name).connections.length == 0;
},
function () {
startVersionChangeTransaction(request, connection, oldVersion);
});
}
function startVersionChangeTransaction(request, connection, oldVersion) {
var database = getOriginDatabase(connection.name);
database.connections.push(connection);
var tx = new util.IDBTransaction(connection, [], util.IDBTransaction.VERSION_CHANGE);
if (oldVersion == 0) {
tx._queueOperation(function (sqlTx, nextRequestCallback) {
sqlTx.executeSql("CREATE TABLE [" + indexedDB.SCHEMA_TABLE + "] (" +
"id INTEGER PRIMARY KEY AUTOINCREMENT, " +
"type TEXT NOT NULL, " +
"name TEXT NOT NULL, " +
"keyPath TEXT, " +
"currentNo INTEGER NOT NULL DEFAULT 1, " +
// specific to tables
"autoInc BOOLEAN, " +
// specific to indexes
"tableId INTEGER, " +
"[unique] BOOLEAN, " +
"multiEntry BOOLEAN, " +
"UNIQUE (type, name) ON CONFLICT ROLLBACK)");
nextRequestCallback();
});
}
tx._queueOperation(function (sqlTx, nextRequestCallback) {
connection._loadObjectStores(sqlTx,
function () {
request.result = connection;
if (request.onupgradeneeded) {
request.transaction = connection._versionChangeTransaction = tx;
var e = new util.IDBVersionChangeEvent("onupgradeneeded",
request, oldVersion, connection.version);
request.onupgradeneeded(e);
}
nextRequestCallback();
},
function (error) {
nextRequestCallback();
});
});
tx.onabort = function (e) {
request.error = tx.error;
connection._versionChangeTransaction = null;
if (request.onerror) request.onerror(util.event("abort", request));
};
tx.onerror = function (e) {
request.transaction = connection._versionChangeTransaction = null;
util.fireErrorEvent(request, tx.error);
};
tx.oncomplete = function (e) {
request.transaction = connection._versionChangeTransaction = null;
util.fireSuccessEvent(request);
};
}
function openVersionMatch(request, connection, sqldb) {
sqldb.transaction(
function (sqlTx) {
connection._loadObjectStores(sqlTx);
},
function (error) {
util.fireErrorEvent(request, error);
},
function () {
util.fireSuccessEvent(request, connection);
}
);
}
// IDBFactory.deleteDatabase
indexedDB.deleteDatabase = function (name) {
// INFO: There is no way to delete database in Web SQL Database API.
var database = getOriginDatabase(name);
database.deletePending = true;
var request = new util.IDBOpenDBRequest(null);
util.async(function () {
request.readyState = util.IDBRequest.DONE;
var sqldb = util.openDatabase(name);
if (sqldb.version == "") {
database.deletePending = false;
util.fireSuccessEvent(request);
}
else {
fireVersionChangeEvent(request, name, parseInt(sqldb.version), null);
util.wait(function () {
return database.connections.length == 0;
},
function () {
deleteDatabase(request, sqldb, database);
});
}
});
return request;
};
// IDBFactory.cmp
indexedDB.cmp = function (first, second) {
first = util.encodeKey(first);
second = util.encodeKey(second);
return first > second ? 1 : (first == second ? 0 : -1);
};
indexedDB._notifyConnectionClosed = function (connection) {
var database = getOriginDatabase(connection.name);
var i = database.connections.indexOf(connection);
if (i >= 0) database.connections.splice(i, 1);
};
// Utils
function getOriginDatabase(name) {
var db = origin[name];
if (db == null) {
db = {
name : name,
deletePending : false,
connections : [] // openDatabases
};
origin[name] = db;
}
return db;
}
function fireVersionChangeEvent(request, name, oldVersion, newVersion) {
var database = getOriginDatabase(name);
var anyOpenConnection = false;
for (var i = 0; i < database.connections.length; i++) {
var conn = database.connections[i];
if (conn._closePending) continue;
anyOpenConnection = true;
var event = new util.IDBVersionChangeEvent("versionchange", request, oldVersion, newVersion);
if (conn.onversionchange) conn.onversionchange(event);
}
if (anyOpenConnection) {
var event = new util.IDBVersionChangeEvent("blocked", request, oldVersion, newVersion);
if (request.onblocked) request.onblocked(event);
}
}
function deleteDatabase(request, sqldb, database) {
sqldb.changeVersion(sqldb.version, "",
function (sqlTx) {
sqlTx.executeSql("SELECT a.type, a.name, b.name 'table' FROM " + indexedDB.SCHEMA_TABLE +
" a LEFT JOIN " + indexedDB.SCHEMA_TABLE + " b ON a.type = 'index' AND a.tableId = b.Id",
null,
function (sqlTx, results) {
var name;
for (var i = 0; i < results.rows.length; i++) {
var item = results.rows.item(i);
name = item.type == 'table' ? item.name : util.indexTable(item.table, item.name);
sqlTx.executeSql("DROP TABLE [" + name + "]");
}
sqlTx.executeSql("DROP TABLE " + indexedDB.SCHEMA_TABLE);
});
},
function (error) {
database.deletePending = false;
util.fireErrorEvent(request, error);
},
function () {
database.deletePending = false;
util.fireSuccessEvent(request);
});
}
/* IDBIndex */
var IDBIndex = util.IDBIndex = window.IDBIndex = function (objectStore, name, keyPath, unique, multiEntry) {
this.objectStore = objectStore;
this.name = name;
this.keyPath = keyPath;
this.unique = unique;
this.multiEntry = multiEntry;
this._ready = true;
};
IDBIndex.prototype.openCursor = function (range, direction) {
return performOpeningCursor(this, util.IDBCursorWithValue, range, direction);
};
IDBIndex.prototype.openKeyCursor = function (range, direction) {
return performOpeningCursor(this, util.IDBCursor, range, direction);
};
IDBIndex.prototype.get = function (key) {
var encodedKeyOrRange = util.validateKeyOrRange(key);
var request = new util.IDBRequest(this);
var me = this;
this.objectStore.transaction._queueOperation(function (sqlTx, nextRequestCallback) {
var sql = ["SELECT s.value FROM [" + util.indexTable(me) + "] AS i INNER JOIN"];
sql.push("[" + me.objectStore.name + "] AS s ON s.id = i.recordId");
if (encodedKeyOrRange instanceof util.IDBKeyRange) {
sql.push("WHERE", encodedKeyOrRange._getSqlFilter("i.key"));
}
else if (encodedKeyOrRange != null) {
sql.push("WHERE (i.key = X'" + encodedKeyOrRange + "')");
}
sql.push("ORDER BY i.key, i.primaryKey LIMIT 1");
sqlTx.executeSql(sql.join(" "), null,
function (_, results) {
util.fireSuccessEvent(request, results.rows.length > 0 ?
w_JSON.parse(results.rows.item(0).value) : undefined)
},
function (_, error) {
util.fireErrorEvent(request, error);
});
nextRequestCallback();
});
return request;
};
IDBIndex.prototype.getKey = function (key) {
var encodedKeyOrRange = util.validateKeyOrRange(key);
var request = new util.IDBRequest(this);
var me = this;
this.objectStore.transaction._queueOperation(function (sqlTx, nextRequestCallback) {
var sql = ["SELECT hex(primaryKey) 'primaryKey' FROM [" + util.indexTable(me) + "]"];
if (encodedKeyOrRange instanceof util.IDBKeyRange) {
sql.push("WHERE", encodedKeyOrRange._getSqlFilter());
}
else if (encodedKeyOrRange != null) {
sql.push("WHERE (key = X'" + encodedKeyOrRange + "')");
}
sql.push("LIMIT 1");
sqlTx.executeSql(sql.join(" "), null,
function (_, results) {
util.fireSuccessEvent(request, results.rows.length > 0 ?
util.decodeKey(results.rows.item(0).primaryKey) : undefined);
},
function (_, error) {
util.fireErrorEvent(request, error);
});
nextRequestCallback();
});
return request;
};
IDBIndex.prototype.count = function (key) {
var encodedKeyOrRange = util.validateKeyOrRange(key);
var request = new util.IDBRequest(this);
var me = this;
this.objectStore.transaction._queueOperation(function (sqlTx, nextRequestCallback) {
var sql = ["SELECT COUNT(recordId) AS 'count' FROM [" + util.indexTable(me) + "]"];
if (encodedKeyOrRange instanceof util.IDBKeyRange) {
sql.push("WHERE", encodedKeyOrRange._getSqlFilter());
}
else if (encodedKeyOrRange != null) {
sql.push("WHERE (key = X'" + encodedKeyOrRange + "')");
}
sqlTx.executeSql(sql.join(" "), null,
function (_, results) {
util.fireSuccessEvent(request, results.rows.item(0).count);
},
function (_, error) {
util.fireErrorEvent(request, error);
});
nextRequestCallback();
});
return request;
};
// Utils
var w_JSON = window.JSON;
function performOpeningCursor(me, cursorType, range, direction) {
var request = new util.IDBRequest(me);
var cursor = new cursorType(me, direction, request);
cursor._range = util.IDBKeyRange._ensureKeyRange(range);
cursor.continue();
return request;
}
/* IDBKeyRange */
var IDBKeyRange = util.IDBKeyRange = window.IDBKeyRange = function (lower, upper, lowerOpen, upperOpen) {
this.lower = lower;
this.upper = upper;
this.lowerOpen = lowerOpen || false;
this.upperOpen = upperOpen || false;
};
IDBKeyRange.only = function (value) {
return new IDBKeyRange(value, value, false, false)
};
IDBKeyRange.lowerBound = function (lower, open) {
return new IDBKeyRange(lower, undefined, open || false, true);
};
IDBKeyRange.upperBound = function (upper, open) {
return new IDBKeyRange(undefined, upper, true, open || false);
};
IDBKeyRange.bound = function (lower, upper, lowerOpen, upperOpen) {
return new IDBKeyRange(lower, upper, lowerOpen || false, upperOpen || false);
};
IDBKeyRange._ensureKeyRange = function (arg) {
if (arg == null) {
return util.IDBKeyRange.bound();
}
if ((arg instanceof util.IDBKeyRange)) {
return arg;
}
return util.IDBKeyRange.only(arg);
};
IDBKeyRange._clone = function (range) {
return util.IDBKeyRange.bound(range.lower, range.upper, range.lowerOpen, range.upperOpen);
};
IDBKeyRange.prototype._getSqlFilter = function (keyColumnName) {
if (keyColumnName == undefined) keyColumnName = "key";
var sql = [], hasLower = this.lower != null, hasUpper = this.upper != null;
if (this.lower == this.upper) {
sql.push("(" + keyColumnName + " = X'" + util.encodeKey(this.lower) + "')");
}
else {
if (hasLower) {
sql.push("(X'" + util.encodeKey(this.lower) + "' <" +
(this.lowerOpen ? "" : "=") + " " + keyColumnName + ")");
}
if (hasUpper) {
sql.push("(" + keyColumnName + " <" +
(this.upperOpen ? "" : "=") + " X'" + util.encodeKey(this.upper) + "')");
}
}
return sql.join(" AND ");
};
/* IDBObjectStore */
var IDBObjectStore = util.IDBObjectStore = window.IDBObjectStore = function (name, keyPath, autoIncrement, tx) {
this.name = name;
this.keyPath = keyPath;
this.indexNames = new indexedDB.DOMStringList();
this.transaction = tx;
this.autoIncrement = autoIncrement == true;