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Provide for a second buildserver. If provided then the user is presented
a choice of two different build servers. This feature was introduced to
support building against two different versions of the Android SDK. As
of 8/1/2018 MIT is using this feature with the first buildserver
building Apps with a minSdk of 7 (but no targetSdk defined) to support
older devices. The second buildserver is configured with a minSdk of 14
and a targetSdk of 26 (along with the necessary component code
changes). This is required for new Apps submitted to the Google Play
Store. Having two buildservers provides us the flexibility to support
older devices while also ensuring that people can submit MIT App
Inventor created Apps to the Google Play Store.

Change-Id: Iae58f9ff4d112f8bc5d3203675f37cec7bf76920

Change-Id: I292edeb088aefbb6edeb171bc84ef1218b9d79d9

Change-Id: I6f82d9f363a95e8fb2f72e0bad022ad2977d7162

Change-Id: Ib6cffd0a01efd3e06c67e049768f11d382f4e599

Make the DataChanged event consistent with the GotValue event as to how
it handles images.

Change-Id: I08bdbd829cd423fe435081845b863ec4200eb7c4

Closes #1036

Change-Id: I616d845134a42b9f93186d0403d4683c1200af35

When we update App Inventor to a later Android API, the requirement that
webview interface have the annotation will be enforced. This one was
missing

Change-Id: I61dca27b000fb7b9166fe75bdd34ba00f2077841

This commit adds two new properties to the FusionTables component. The
first property is "LoadingDialogMessage". This allows the user to
customise the default "Please wait loading..." text which is shown in
the dialog after calling the .SendQuery function.  The second property
is "ShowLoadingDialog" this allows the user to choose whether or not
to show the dialog.

Change-Id: Ia034d66dcab4960ad3ef972e17c0d89336aca75d

If a designer property is included in a component without a
corresponding block entry, then the YAIL code generator will throw an
exception attempting to look up the type of the property when
generating set-and-coerce-property! code for the designer. This change
enforces that every @DesignerProperty have a corresponding
@SimpleProperty to ensure that components and extensions include the
necessary information.

Change-Id: I85cf53b1b657254658fd0cb0f05af3dde6b32740

Change-Id: Ibae0a6e0b9b4a06e809f4cf8265a1f10f86382aa

Fixes #1144 

Reference #!null directly in the while macro instead of via
the *the-null-value* which apparently isn’t always bound.

Change-Id: I2e178f4c6a0317d4014d115912c16b9689bf1dd5

Modified the “while” macro to avoid a bug in the Kawa in-line optimizer.

Change-Id: I4247adab9fbf80e2e3396f67c4aac5f4a21fa752

Due to an optimization that reused the component references in blocks
to determine the names of components, components with event handlers
would have their init-thunks called before components without
events. This would result in different initialization paths between
the REPL and compiled apps. This change makes the ordering of
init-thunks consistent by always using the order created by walking
the Form's JSON description.

Fixes #1279

Change-Id: I5ea1070df17a1dd96923cff2f0adfd6889a987b2

Change-Id: I1cc72fa09f8e5b51c22b78e774a6c5b5d119f9f7

The components reference page was missing a link to the Experimental component category.

This results in compilation building a single large Javascript download
instead of one for each browser/language combination. In production,
minification reduces the size of this file to something
reasonable. However if you build directly from master, this one file
will be pretty large. However it will work just fine.

This changes significantly speeds up the build process.

Change-Id: I330faf96fd95e538e3c19130c85c3ae8dbb077df

Fixes #1230

Change-Id: I1eb4579f4873d2e60b357acd463dbbd77261c936

Change-Id: Id0995d95294c4e604b17eebf495f3ee04b87c36d

Change-Id: I86ad3e3f63315d7b78765f59d1b5763b4f63104c

The Android SDK provided zoom controls used by osmdroid are not scaled
by ScaledFrameLayout, and so do not work correctly when Sizing is
Fixed. Further, the ZoomButtonsController is deprecated starting with
SDK 26 and Google recommends that developers provide custom views for
zoom controls.

This change implements zoom controls for the Map component similar to
those shown in the designer.

Change-Id: If5d15ea1387161f42a9bd6b59b210ea23baa85a0

Already added in https://github.com/mit-cml/appinventor-sources/blob/c294e2fc92f726eadc9531c3aa9edcbf497cc5c8/appinventor/components/build.xml#L273

`type.equals("short")` was checked twice

Change-Id: I239b3378d6494cdac20e2034fb0f8667f0811819

* Add menu option to remove block stack from Backpack

Change-Id: Iada620f2d8a425367faf5a05d15f43236fede95d

Change-Id: Icef6b14f0248258189a764989778e0aba9ce4c05

Change-Id: Id93060e5d4a9c9b8ae153a7c2ac57dac92ad99f6

Move compass to the right side as shown in the designer.

Users could rotate the map but not programmatically. This change adds
blocks to allow developers to programmatically change the map rotation.

Fixes #1082

Change-Id: I476263bb834cf32f4ab8c74c3f525ab0224362d8

If one deleted a component while on the blocks screen, the drawer
remained open. This commit tracks the last component opened and, if
the deleted component name matches the last component opened, it will
close the drawer. We track the last component referenced so that we
don't hide the drawer in the event a component is deleted when another
drawer, for example the built-in math blocks, is open.

Change-Id: I4808a069b38986e44892e721b2d35132bfdae943

Implementation of the drag and drop support for the designer did not
handle touch events on the help and remove extension buttons in the
palette. This commit adds the corresponding implementations to improve
touch support.

Change-Id: I7a877683da6421c67104f4fb704e7c35fd90f578

Add a Shutdown Hook. In a container swarm, the swarm orchestrator may
choose to shutdown a container (running a buildserver) as part of load
balancing and other maintenance tasks. It will send a SIGTERM signal to
the container which will send it to us. This shutdown hook causes us to
wait until all build tasks are completed before we exit, ensuring that
people's build jobs are not interrupted We combine this code with a
configuration in the swarm service to *not* hard kill a container for a
period of time (say 15 minutes) to give the buildserver a chance to
finish outstanding jobs.

Change-Id: Ie0fed539162e219af3df96a1402f153fc0473f0e

Buildserver progress, as reported in the progress bar during a build,
used to work by having the client poll the App Inventor server, which
would in turn poll the buildserver to learn the progress of the build.

However this code would only work properly if there was only one
buildserver and only one build in progress. In reality we handle dozens
of builds simultaneously via a number of independent buildservers. So
the progress being returned to the user was the progress of *some* build
in the system, most likely not theirs!

The constant polling by the App Inventor server also causes problems
with the load balancer in front of the buildservers. This is because
most “jobs” are not real build jobs, but just polls for progress. This
may result in a non-optimal distribution of jobs between the various
buildservers.

This code changes things so that the buildserver does a callback to the
App Inventor server when appropriate milestones are reached in the
build job. The client still polls to App Inventor server for progress,
but the App Inventor server no longer polls the buildserver. This should
result in a better distribution of build jobs on the buildservers and
also returns to the end user the correct status of their build.

We also removed some obsolete code that attempts to generate the Yail
within the Buildserver. We *always* generate the yail in the client now
and it is sent to the buildserver.

Change-Id: Ibaa9a7e3ff6576335d5ab6261a4121f27a1daf1d

The recent update to the Clock component broke three unit tests (the
tests were actually checking for the incorrect behavior). This change
updates the tests to check for the correct behavior.

Change-Id: I8fafefeb5a673104c8446c9421b8a0bb98f46553

Fixes #1204. Also fix some typos in the documentation.

Change-Id: I7811a2ed368478e3306c9f54ee347f7adfd33fea

Signal an event when the cancel button is used in ShowTextDialog and
ShowChooseDialog. Implement issue #877

Change-Id: I817e1b8d4e08aa6b69968baca96d3741fd852e6b

Fixed i18n translation issue