This reverts commit 5e995fb8.

Change-Id: I761e0e41906742fbe3d3ac34170af3101e18042a

The main purpose of this CL is expanding FontLanguage to be able to
save full script tag. Previously, FontLangauge kept only limited script
tags. With this CL, FontLanguage keeps all script tags.

This CL contains the following changes:
- FontLanguage changes:
-- Moved to private directory not to be instantiated outside of Minikin.
-- Removed bool(), bits(), FontLanguage(uint32_t) methods which are no
   longer used.
-- Change the FontLanguage internal data structure.
-- Introduces script match logic.

- FontLanguages changes:
-- Moved to private directory not to be instantiated outside of Minikin.
-- This is now std::vector<FontLanguage>

- FontLanguageListCache changes:
-- Now FontLanguageListCache::getId through
   FontStyle::registerLanguageList is the only way to instantiate the
   FontLanguage.
-- Normalize input to be BCP47 compliant identifier by ICU.

Bug: 26168983
Change-Id: I8df992a6851021903478972601a9a5c9424b100c

Previous CL[1] adds module names into LOCAL_ADDITIONAL_DEPENDENCIES, but
it was wrong. LOCAL_ADDITIONAL_DEPENDENCIES only accepts file path.

However, BUILD_PREBUILT doesn't provide a file path of the installed
font. So use custom tool and LOCAL_GENERATED_SOURCES instead.

Confirmed no-op build doesn't built minikin_tests and
continuous_native_tests.zip contains all necessary files.

[1]: I7d83abc077bce4e38fd93c7d607bc7e1f7871e6b

BUG: 26197092
Change-Id: I90e80036248ae72e0e0f9c6144a259f5f96ec9ce

am: b9f27a25

* commit 'b9f27a25':
  Refactored unsigned long negations

am: 1bbe03d2

* commit '1bbe03d2':
  Refactored unsigned long negations

Replaced two instances of negating an unsigned long, which was
resulting in aborts from unsigned integer sanitization with the
equivalent logical not-add 1.

Bug: 25884483
Change-Id: Ic7498e0af638dcd438ce69803021d3cdc3acd4f6

Removing the extra score of 2 for the script matching from the font
fallback score calculation.  If the two langauges have different
scripts, we should treat them as different languages.

Change-Id: Ie0d6f27bd1086248895935a7bd01b5d404044ad0

To work native tests with additional font related files, copy
the files into /data/nativetest/minikin_tests/.
This copy only happens when the minikin_tests is built.
It is not an expected to copy the font files into the product image.

Change-Id: I7d83abc077bce4e38fd93c7d607bc7e1f7871e6b

FontLanguageListCache is an intentionally leaky singleton and its
internal cache won't be purged.

BUG: 25122318

Change-Id: I272097e979fe44b83fd86822235350e12eda8f51

Avoid integer overflows in parsing fonts am: 6299a6ba am: 998293f9 am: ffadd191 am: d5690857 am: 7aec64b9 am: 8921cfe2
am: 868eaf86

* commit '868eaf86':
  Avoid integer overflows in parsing fonts

Avoid integer overflows in parsing fonts am: 6299a6ba am: 998293f9 am: ffadd191 am: d5690857 am: 7aec64b9
am: 8921cfe2

* commit '8921cfe2':
  Avoid integer overflows in parsing fonts

Avoid integer overflows in parsing fonts am: 6299a6ba am: 998293f9 am: ffadd191 am: d5690857
am: 7aec64b9

* commit '7aec64b9':
  Avoid integer overflows in parsing fonts

am: d5690857

* commit 'd5690857':
  Avoid integer overflows in parsing fonts

am: ffadd191

* commit 'ffadd191':
  Avoid integer overflows in parsing fonts

am: 998293f9

* commit '998293f9':
  Avoid integer overflows in parsing fonts

am: 6299a6ba

* commit '6299a6ba':
  Avoid integer overflows in parsing fonts

If U+FE0E is appended to the emoji code point, the glyph should have a
text presentation.
On the other hand, if U+FE0F is appended to the emoji code point, the
glyph should have an emoji presentation.

Bug: 11256006
Change-Id: I5187d44500b13a138e7ffbcf2c72e2da06374c8c

A malformed TTF can cause size calculations to overflow. This patch
checks the maximum reasonable value so that the total size fits in 32
bits. It also adds some explicit casting to avoid possible technical
undefined behavior when parsing sized unsigned values.

Bug: 25645298
Change-Id: Id4716132041a6f4f1fbb73ec4e445391cf7d9616
(cherry picked from commit 183c9ec2)

A malformed TTF can cause size calculations to overflow. This patch
checks the maximum reasonable value so that the total size fits in 32
bits. It also adds some explicit casting to avoid possible technical
undefined behavior when parsing sized unsigned values.

Bug: 25645298
Change-Id: Id4716132041a6f4f1fbb73ec4e445391cf7d9616

To optimize the font family search, mRanges is used for narrowing down
the search range. However, mRanges is constructed from format 4 or
format 12 entries. So, if the font supports a variation sequence but doesn't
support the base character of the sequence, the font may not be listed in
mRanges.

The proper way to fix this issue is using format 14 subtable information
for mRanges construction. However, this is not a trivial work since currently
we rely on HarfBuzz for variation sequence lookup and it doesn't provide any
API for retrieving coverage information.

Thus, as the quick fix, iterate all font families in font fallback chain if
the variation sequence is specified.

Change-Id: I278da84be8fb8f553590e2e42ed450b7e4a34eca

To implement Paint.hasGlyph(), we need a new method to ask the
FontCollection if it has a glyph for the code point and variation
selector pair.

Bug: 11256006
Change-Id: Ie4185c91bcaa4d01aee6beb97784b1f9d2a88f12

Suppress linebreaks in emoji ZWJ sequences - DO NOT MERGE am: 30fca219  -s ours am: 43772d6e  -s ours
am: 13c1203c  -s ours

* commit '13c1203c':
  Suppress linebreaks in emoji ZWJ sequences - DO NOT MERGE

Accept variation selector in emoji sequences - DO NOT MERGE am: 35e4ebec  -s ours am: 562d243a  -s ours
am: 805f849a  -s ours

* commit '805f849a':
  Accept variation selector in emoji sequences - DO NOT MERGE

am: 43772d6e  -s ours

* commit '43772d6e':
  Suppress linebreaks in emoji ZWJ sequences - DO NOT MERGE

am: 562d243a  -s ours

* commit '562d243a':
  Accept variation selector in emoji sequences - DO NOT MERGE

am: 30fca219  -s ours

* commit '30fca219':
  Suppress linebreaks in emoji ZWJ sequences - DO NOT MERGE

am: 35e4ebec  -s ours

* commit '35e4ebec':
  Accept variation selector in emoji sequences - DO NOT MERGE

Due to the way emoji ZWJ sequences are defined, the ICU line breaking
algorithm determines that there are valid line breaks inside the
sequence. This patch suppresses these line breaks.

Bug: 25433289
Change-Id: I225ebebc0f4186e4b8f48fee399c4a62b3f0218a

This patch basically ignores variation selectors for the purpose of
itemization into font runs. This allows GSUB to be applied when input
sequences contain variation selectors.

Bug: 25368653
Change-Id: I9c1d325ae0cd322c21b7e850d0ec4d73551b2372

This issue was introduced by I22ce0e9eadc941f84e3a9b23462f194e51dd7180.
Need to decrement the two utf16 chars in KEYCAP handling.

To add unit tests, this CL also addresses the Bug: 24184208 by
introducing self built fonts since there is no good example in system
installed fonts.

Bug: 24184208
Change-Id: I23fa008adbaced78a3cb96442a6bc8892ab84ce8

am: c65e6f1e  -s ours

* commit 'c65e6f1e':
  Suppress linebreaks in emoji ZWJ sequences - DO NOT MERGE

Due to the way emoji ZWJ sequences are defined, the ICU line breaking
algorithm determines that there are valid line breaks inside the
sequence. This patch suppresses these line breaks.

Bug: 25433289
Change-Id: I225ebebc0f4186e4b8f48fee399c4a62b3f0218a

am: adaf42f0  -s ours

* commit 'adaf42f0':
  Accept variation selector in emoji sequences - DO NOT MERGE

This patch basically ignores variation selectors for the purpose of
itemization into font runs. This allows GSUB to be applied when input
sequences contain variation selectors.

Bug: 25368653
Change-Id: I9c1d325ae0cd322c21b7e850d0ec4d73551b2372

This is 2nd trial of I30a0914a4633bd93eb60957cdf378770f04d8428

- To suppress noisy unused parameter warnings, comment out unused
  arguments.
- Add -Werror for suppressing further warning.
- Add -Wall -Wextra for safety.
- Use "z" prefix for format string of size_t.

Verified that compile succeeded on all arm,arm64,mips,x86,x86_64.

Change-Id: I7ad208464486b8a35da53929cb1cfe541ed0052f