We'll merge this to master for now, but we should have new attr (such as popupCharWidth) to handle this reasonably in the newly created BaseKeyboard class.

bug: 3082178
Change-Id: I024b946aafbbeb07b865a09f489dacb56f0478d0

To avoid a corner case of bug#3070963, in toggleShift() method of
KeyboardSwitcher, the shifted symbol keyboard will be set if current
keyboard is symbol keyboard or is not shifted symbol keyboard.

This change also implements mini keyboard cache with WeakHashMap.

Bug: 3070963
Change-Id: I868fc072e2f21bddded1622b800a53b9a6a43e91

Before this change, the delay was 500 ms that came from
ViewConfiguration.getLongPressTimeout().  This change reduces the
delay to 400 ms.

Bug: 3074984
Change-Id: Ia5af5e877a3c4bb29211ef4040c728ac09a9fe85

Bug: 3038861
Change-Id: I94011ca80710ff6eb24e940104f7d9d3bb86840a

TODO This animation style API of PopupWindow can be called only in
Gingrebread or later.  We should refactor this using reflection to be
able to be compatible with Froyo.

Bug: 3004787
Bug: 2973989
Change-Id: I2abfcc853b1a0af2bccee7bdf5fbd723456b7d34

This change reverts I28bf3e4deb46a428dc8422a3a165183e00608604 partly

Bug: 3029284
Change-Id: I0701ab9dfa1cfddbecbef3d32e525c0a143fc297

This change also fix popup window display position calculation.

Bug: 3029284
Change-Id: I28bf3e4deb46a428dc8422a3a165183e00608604

Change-Id: If20f289992f829ae3a0a2a1eb60a4fc9b35c308a

To fit a language name to the space bar or the language switcher, this
change chooses smaller text size or shorter language name
appropriately.

This change also tunes the vertical position of a language name in the
space bar by parameter SPACEBAR_LANGUAGE_BASELINE.

Bug: 3004640
Bug: 3001021

Change-Id: Idb3adcb6fac1a23836510912d35312fa11b4f259

The space key preview should be displayed one of the following case.
- Popup preview is enabled
- Language switcher is in action, whether popup preview is enabled or
  not.

For phone number keyboard, popup preview is never displayed even if
popup preview is enabled.

Bug: 3006612
Bug: 3021091
Change-Id: I5385c776d0e8e3981fc8d8851db9140d92599ce5

This change adds lightweight visual hints of alternate numeric characters on the top row - e.g. having a light gray '1' on the upper right corner of letter 'q'

Note that MDPI resources are tentative (the same as HDPI for now, until we get fixed MDPI visual assets).

bug: 3004632
Change-Id: I7a25cf90b702433a844c88f5c47bf914706af9bc

Bug: 3021082
Change-Id: I2cfb462c89b222449ee2ba5559462a9f5d2306ed

The residual time was formerly 150ms by
Ia63662a549481d18046a46ef8292c0a4438b5588, and originally was 70ms.

Bug: 3004787
Change-Id: If60a74c51e9a68f008711cca2423094e8204755f

Bug: 3004793
Change-Id: I1839e6ff3c8c66a576bfb3db9391c146ed225451

Bug: 3004787
Change-Id: Ia63662a549481d18046a46ef8292c0a4438b5588

bug: 2998722

Change-Id: Iac1641c338388fd8f85e0cf47e31afdaeb34c0c0

Bug: 2987077
Change-Id: I971c44be121d8780ec27aa1649fd0925e249fbbc

This change also introduces MiniKeyboardKeyDetector and
mini_keyboad_slide_allowance parameter to tune the key detection
behavior.

Bug: 2993769
Change-Id: I1932b0a382e172cb77b9e098ae182049c834dfe0

Also, tentatively added key detection allowance for below of the keys in mini popup keyboard.

bug: 2979407
Change-Id: I84794969facd929c84df23e0120d46dff71c6efb

Also fixed an issue when the mini popup keyboard hits the right edge of the view.

A few code cleanups as well.

bug: 2980864

Change-Id: I95f8392521e57560907d54b662e3483ebaf6f7ce

Change-Id: I333693ab8e4088180cc25768d874ad7320d9da8b

Bug: 2978975

Change-Id: Ie634e8ae827fe093c5c673b75d85835050b03794

Actually it was caused by canceling repeat key (space and delete) when
multiple pointer are touching.

Bug: 2975041
Change-Id: If82183b9225efdace7b5418860b9664f1705b7ec

This change also disable the special behavior of long press a key that
has only one digit alternate.  If the visual design of both the pop-up
preview and the mini keyboard will look like same, I think that
showing mini keyboard is enough for the key that has one digit
alternate.

Bug: 2973546
Change-Id: I04f138c120aa58526fe054626dac856171fb7a58

Bug: 2973373
Change-Id: I9871c09ec8c1c2aa945d97392e61ee1ec585baef

This change also fixes bug#2973683.

Bug: 2973546
Bug: 2973683
Change-Id: I67573e5b7cad4af261591a4a608d0596dd7901f2

Change-Id: Iba8e43ba6125e559d4c7d9cadb6bcb13b8eefc83

This change also refactors some mini-keyboard related methods in
LatinKeyboardBaseView and PointerTracker class.

Bug: 2973236
Change-Id: I3190fe89ea3ac3c6d351ed4b6d77de98a0aa65db

Bug: 2959169
Change-Id: Iea1bec44baf3344d9f91280bd2b8f28476cbcf51

Bug: 2959169
Change-Id: I9c78f9417aaa448b8b23596bc3e748fe99085393

TODO:
- Remove close button on mini-keyboard
- Dismiss mini-keyboard when finger leave the screen while no key is selected

This change also renames some instance variables to have more meaningful name.

Bug: 2959169
Change-Id: I9fd79116a647d7be82415c6e9e7cdaf6edcb2bf6

Bug: 2959169
Change-Id: Id2b0b974fffdf6f09ee1828e957b973d2ce1c315

This change also adds debugging log to PointerTracker class

Bug: 2959169
Change-Id: Ie6cf67681180467bd8ba35d0205ce6727b7684a2

Bug: 2910379
Change-Id: I5cfae33e72a406585137842a2260310813cee07f

It is easier to track each pointer if a PointerTracker object keeps
its pointer id.

Bug: 2910379
Change-Id: If3e3b0cf3d834d22302598f4d85d54c9a4ce92ba

The KeyDetector abstracts key detection algorithm. The
ProximityKeyDetector is one of its concrete implementations.  Another
one that might be called XAxisKeyDetector will follow to realize the
pop-up mini-keyboard behavior described in bug#2959169.

Bug: 2959169
Change-Id: Idd3fc53282e6b721ec7a4ce500af8aba21ce07a3

Bug: 2910379
Change-Id: I179ae4359afb57c351d5fcc5f5453c30d3ef0c01

Bug: 2910379
Change-Id: Iefafa2d30ad16f898a00664e4bf3e3e88dcd2cb2

Bug: 2910379
Change-Id: I9503b2211b272a4a2903d0732985e5ab8ee39440

bug: 2964045
Change-Id: I97d95181e1a6838ace9c135aa92e7f20034e821f