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now, all attachment URLs are correctly revoked

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This commit is contained in:
Javier Abadia 2014-04-27 18:50:43 +02:00
parent d5c106fa14
commit d2e3d13823
1 changed files with 57 additions and 22 deletions
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79
lib/edit/attachmentsStore.js
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@ -161,11 +161,13 @@ define([], function()
var index = objectStore.index("featureId");
var keyRange = IDBKeyRange.only(featureId);
var deletedCount = 0;
index.openKeyCursor(keyRange).onsuccess = function(evt)
index.openCursor(keyRange).onsuccess = function(evt)
{
var cursor = evt.target.result;
if(cursor)
{
var attachment = cursor.value;
this._revokeLocalURL(attachment);
objectStore.delete(cursor.primaryKey);
deletedCount++;
cursor.continue();
@ -174,41 +176,62 @@ define([], function()
{
callback(deletedCount);
}
};
}.bind(this);
};
this.delete = function(attachmentId, callback)
{
console.assert(this._db !== null, "indexeddb not initialized");
var request = this._db.transaction([OBJECT_STORE_NAME],"readwrite")
.objectStore(OBJECT_STORE_NAME)
.delete(attachmentId);
request.onsuccess = function(event)
// before deleting an attachment we must revoke the blob URL that it contains
// in order to free memory in the browser
this.retrieve(attachmentId, function(success, attachment)
{
setTimeout(function(){callback(true);},1);
};
request.onerror = function(err)
{
callback(false,err);
};
if( !success )
{
callback(false,"attachment " + attachmentId + " not found");
return;
}
this._revokeLocalURL(attachment);
var request = this._db.transaction([OBJECT_STORE_NAME],"readwrite")
.objectStore(OBJECT_STORE_NAME)
.delete(attachmentId);
request.onsuccess = function(event)
{
setTimeout(function(){callback(true);},1);
};
request.onerror = function(err)
{
callback(false,err);
};
}.bind(this));
};
this.deleteAll = function(callback)
{
console.assert(this._db !== null, "indexeddb not initialized");
var request = this._db.transaction([OBJECT_STORE_NAME],"readwrite")
.objectStore(OBJECT_STORE_NAME)
.clear();
request.onsuccess = function(event)
this.getAllAttachments(function(attachments)
{
callback(true);
};
request.onerror = function(err)
{
callback(false,err);
};
attachments.forEach(function(attachment)
{
this._revokeLocalURL(attachment);
},this);
var request = this._db.transaction([OBJECT_STORE_NAME],"readwrite")
.objectStore(OBJECT_STORE_NAME)
.clear();
request.onsuccess = function(event)
{
callback(true);
};
request.onerror = function(err)
{
callback(false,err);
};
}.bind(this));
};
this.replaceFeatureId = function(featureLayerUrl, oldId, newId, callback)
@ -277,6 +300,18 @@ define([], function()
};
};
// internal methods
this._createLocalURL = function(attachment)
{
};
this._revokeLocalURL = function(attachment)
{
window.URL.revokeObjectURL(attachment.url);
};
this.init = function(callback)
{
console.log("init AttachmentStore");