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Implement localStorage.key() and localStorage.length

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This brings PhoneGap's implementation in line with the spec at http://dev.w3.org/html5/webstorage/
It makes the following demo work when you include PhoneGap: http://people.w3.org/mike/localstorage.html
I was hopeful it would make my app, which makes use of LawnChair, work, but I've had no such luck as of yet.
This commit is contained in:
Mark Darbyshire 2011-02-15 18:44:06 +13:00 committed by Fil Maj
parent 939b70243d
commit 47ca081f36
1 changed files with 27 additions and 9 deletions
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36
framework/assets/js/storage.js
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@ -307,15 +307,21 @@ var CupcakeLocalStorage = function() {
this.db = openDatabase('localStorage', '1.0', 'localStorage', 2621440); this.db = openDatabase('localStorage', '1.0', 'localStorage', 2621440);
var storage = {}; var storage = {};
this.length = 0;
function setLength (length) {
this.length = length;
localStorage.length = length;
}
this.db.transaction( this.db.transaction(
function (transaction) { function (transaction) {
var i; var i;
transaction.executeSql('CREATE TABLE IF NOT EXISTS storage (id NVARCHAR(40) PRIMARY KEY, body NVARCHAR(255))'); transaction.executeSql('CREATE TABLE IF NOT EXISTS storage (id NVARCHAR(40) PRIMARY KEY, body NVARCHAR(255))');
transaction.executeSql('SELECT * FROM storage', [], function(tx, result) { transaction.executeSql('SELECT * FROM storage', [], function(tx, result) {
for(i = 0; i < result.rows.length; i++) { for(var i = 0; i < result.rows.length; i++) {
storage[result.rows.item(i).id] = result.rows.item(i).body; storage[result.rows.item(i)['id']] = result.rows.item(i)['body'];
} }
PhoneGap.initializationComplete("cupcakeStorage"); setLength(result.rows.length);
PhoneGap.initializationComplete("cupcakeStorage");
}); });
}, },
@ -324,13 +330,13 @@ var CupcakeLocalStorage = function() {
} }
); );
this.setItem = function(key, val) { this.setItem = function(key, val) {
//console.log('set'); if (typeof(storage[key])=='undefined') {
this.length++;
}
storage[key] = val; storage[key] = val;
this.db.transaction( this.db.transaction(
function (transaction) { function (transaction) {
transaction.executeSql('CREATE TABLE IF NOT EXISTS storage (id NVARCHAR(40) PRIMARY KEY, body NVARCHAR(255))'); transaction.executeSql('CREATE TABLE IF NOT EXISTS storage (id NVARCHAR(40) PRIMARY KEY, body NVARCHAR(255))');
transaction.executeSql('REPLACE INTO storage (id, body) values(?,?)', [key,val]); transaction.executeSql('REPLACE INTO storage (id, body) values(?,?)', [key,val]);
} }
); );
@ -340,24 +346,36 @@ var CupcakeLocalStorage = function() {
}; };
this.removeItem = function(key) { this.removeItem = function(key) {
delete storage[key]; delete storage[key];
this.length--;
this.db.transaction( this.db.transaction(
function (transaction) { function (transaction) {
transaction.executeSql('CREATE TABLE IF NOT EXISTS storage (id NVARCHAR(40) PRIMARY KEY, body NVARCHAR(255))'); transaction.executeSql('CREATE TABLE IF NOT EXISTS storage (id NVARCHAR(40) PRIMARY KEY, body NVARCHAR(255))');
transaction.executeSql('DELETE FROM storage where id=?', [key]); transaction.executeSql('DELETE FROM storage where id=?', [key]);
} }
); );
}; };
this.clear = function() { this.clear = function() {
storage = {}; storage = {};
this.length = 0;
this.db.transaction( this.db.transaction(
function (transaction) { function (transaction) {
transaction.executeSql('CREATE TABLE IF NOT EXISTS storage (id NVARCHAR(40) PRIMARY KEY, body NVARCHAR(255))'); transaction.executeSql('CREATE TABLE IF NOT EXISTS storage (id NVARCHAR(40) PRIMARY KEY, body NVARCHAR(255))');
transaction.executeSql('DELETE FROM storage', []); transaction.executeSql('DELETE FROM storage', []);
} }
); );
}; };
this.key = function(index) {
var i = 0;
for (var j in storage) {
if (i==index) {
return j;
} else {
i++;
}
}
return null;
}
} catch(e) { } catch(e) {
alert("Database error "+e+"."); alert("Database error "+e+".");
return; return;