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Asset loading is performed asynchronously and usually happens
quickly. However with many or large assets, the transferring of the
asset to the device (or emulator) may not finish in time, resulting in
an error and a re-try (which eventually succeeds).

We re-factor the asset transferring code to properly handle its
asynchronous nature using appropriate callbacks.

Change-Id: Idf0170d9a6d929a7ca964b3852811b2b09dc49ce

Change-Id: I8b786623776c50edfd44af519eee87c7779cbd56

Fix to permit extension loading again.

Change-Id: I6edb0391d1f4abb9815eda198af8ed16b7b5da7c

When changing the called procedure name in a procedure block that
returns a value, the parameter sockets disappear and the block becomes
unusable. This is caused by the fact that the code looks to call
getProcedureDef but it is undefined, even on procedure blocks. The
issue was that it is supposed to be copied from the no return version
of the procedure call block, but the reference was wrong and so the
value was undefined. This commit fixes the erroneous reference in
order that the behavior is correct. This also has the side effect of
fixing the (unreported?) bug that the "Highlight Proceduce" context
menu action was not working due to the same issue.

Fixes #844

Change-Id: I7041c3ab05a89c1a710128a7d91a543bb601940a

Change-Id: I040f50fbe9fadf0fbd3b26e7312fa98b43f3d374

Change-Id: I375eddc7d09e1042ad372e2c581552c1401954d6

Mitigate a Race Condition where blockly reads the component database
before the project has finished initializing the component
database. This race only tends to manifest in projects with several (or
many) screens each of which have a significant number of blocks.

Change-Id: I073c4fb30a522d59e6ba060b39183798ce9ac10e

Android Servlet let’s you download your packaged apps to your own
device.

Change-Id: I1b074fc65591642e8e8e9fe468609cd6a7d5af2b

Remove code that was used to communicate with the AI Classic Blocks
editor. It is no longer in use.

Change-Id: I5a1dc1e3a4081723a74c4370265158f29cd4ae34

Change-Id: I1d50c87acab77adc301b551ee32570d81a7a90f7

ActivityStarter uses String.isEmpty(), which was introduced in Java
1.6. However, older versions of Android are only binary compatible
with Java 1.5, such as the version used in the emulator. This causes
the ActivityStarter to throw an exception when starting an activity.

This commit fixes the issue by replacing the call to String.isEmpty()
with android.text.TextUtils.isEmpty(String), which is available since
Android API version 1. This is consistent with other checks in
components, such as Canvas and Web.

Closes #827

Change-Id: I5c26bab97421a86b3d62888af447d999af38450a

There is a race condition where if App Inventor is closed (browser
window closed) while the system is still initializing, the user’s global
settings will be over-written by an empty settings object because the
global settings have not finished loading. We detect that with this code
and avoid over-writing the settings.

Change-Id: Icfcf8204b860984bf36e2a7d525ebf5814a2ffd8

Generate the user’s project list by doing one bulk API call to to the
datastore to fetch project meta data.

Change-Id: Ie3a93126b22e2292bc4b270d4d54c5c382880cf9

Arrange to make a screenshot of the blocks whenever a blocks editor is
exited.

Change-Id: I4f88aa8c479e6b111bdc477a0fb3821cc815be15

Add a No-Op function. Along with a session idle timeout and session
renew time, we can ensure that closed browsers (which will stop
performing no-op operations) will be logged out.

Change-Id: Ibdd1a55b172fc2aad2c8bed012ae86508d1d025b

Fix some XSS issues on the server side.

Change-Id: I5f0b2a1da87666ef56b4d83c1414d66d8f1d3eb6

Now that we support HTML markup in Labels, we need to make sure it is
safe to display in the user’s browser.

Change-Id: I17cd06a4ade1e7a58ffeb9ba256ac83a166afd0d

“repo” is used by the template code to indicate a user supplied template
repository (so you can build your own webpage and link to App Inventor
with something like
http://ai2.appinventor.mit.edu/?repo=<myrepo>. Similarly the galleryId
value is used to point to an App in the Gallery which should be opened
upon login. The locale value determines which language App Inventor
should start in.

This commit fixes how we handle these values as we move from the client
application to the LoginServlet and back to the client application so
that they are preserved.

Note: A person’s very first login does not preserve these values because
the code that displays the terms of service fails to preserve them. This
is an old bug that we do not fix here (but can at a later date).

Change-Id: I53768cfaadd12175e3c1fe821e58024d984afcfa

Change-Id: I142c4808c2bca82983cfa669b8864b49ce1ec670

Change-Id: Ic5f7f2c42d47b960bc106c46fd7d70e3e37b3f69

Change-Id: I371ab03f71bbabae60d9c9d01cab7b975737f875

Change-Id: Ie3374ef51d4f16a2916242f691649f0c6bc4f57a

We trigger an “ErrorOccurred” event when we attempt to divide by
zero. This can be handled by the App Inventor programmers. If it isn’t
handled, a Notification is generated to the end-user. If the numerator
is non-zero, +-INTEGER_MAX (2147483647) is returned. If the numerator is
0, then a 0 is returned.

Change-Id: Ib323c692528fd331c33fcd64de5caa24c2ff9126

Activities must now have an action specified

Change-Id: Icafa0edbc3bec4afdb4f4ba12cf68d15f2a6a8a8

Instead of using App Engine sessions, create our own cookie
instead. This cookie contains all of the session state itself, encrypted
and mac’d so that the end-user cannot tamper with it.

The cookie itself is constructed using Google’s Protobufs code and
encrypted with the Keyczar library

Change-Id: Icde67c34bd3828a488876f6a1c0800fb86d7e7b2

The returned value of the selection index in a ListView is now
independent of any filter that is applied. So it is always based on the
position in the list that is given ListView to select from.

Change-Id: I50bcf8d7ed21dbd06dcbca81fec2a9d631f0b7da

You can now load a new version of an extension, provided it has the same
package name, over a previous version. Any incompatible block changes
between the old and new version will result in the blocks being marked
“bad”. The MIT App Inventor programmer then has to do some cleanup, but
this is way better then having to delete the old component, which
removes all associated blocks.

Change-Id: I05ad39e16dcb8ea298091fa01338d5cf6c16c23e

Make sure meta data is cleaned up when we attempt to publish an App to
the Gallery but fail because it contains an extension (or for whatever
reason the upload fails).

Change-Id: I3052ea6b5b4195ddac4469f19966df7ba98934af

Change-Id: Ie66104df626dc0d1c4329c2a87ad7316695872d8

Refers the user of an app that has been reported to the Terms and
conditions when deactivating it. Also now it is required to add a
description when reporting an app (Makes moderation easier).

Change-Id: I59ecfe1bf38c33cf4ab1dcf3c3f17b5ead750fe8

Add Scrollable versions of Horizontal and Vertical Arrangements

Author: Kseniia Shumelchyk <shumelchyk@gmail.com>
Author: Jeffrey I. Schiller <jis@mit.edu>

Change-Id: Iddb20dca7835de8dad548dbb8043a600b60f9ded

Add numbers to the property values shown in the designer dropdowns for
aligment, as requested in issue #182

Change-Id: Ia57d2911e2389436b37fe9a8ecb53a007ebca691

Fixed the issue where text in comment blocks disappears when the user
downloads blocks as images

Change-Id: I00339e03fda72d3b563631b536e6391ee05332b5

Change-Id: Ie010e3eb2ca7267407681c360d15b750e348f1fd

Provide Chinese translations for the Companion Update Menu Item.

Change-Id: I2c41abbc4daa86707d65d89592c62c5787f7bdeb

Change-Id: I0a5c96a31fd7661ca0a68049f5d7719801998206

Change-Id: Iab1bcde9e8b294c54e54ced00f1ac8ac591454c2