The character offset passed to isGraphemeBreak is relative to the beginning
of the string (not relative to the text_start parameter). This caused bad
results when searching for grapheme breaks beyond the first line of text
(see https://github.com/flutter/flutter/issues/24802).
This PR fixes the offset value. It also reverts the workaround applied in
https://github.com/flutter/engine/pull/10063, which caused incorrect
calculation of boundaries between graphemes within ligatures.
This is similar to the workaround used for
https://github.com/flutter/flutter/issues/30347
The Minikin line breaker inserts greedy breaks based on a comparison of
postBreak width and currentLineWidth. currentLineWidth is provided by
the framework based on previous calls to Layout::measureText.
That calculation may not exactly match the calculation of postBreak.
This change ensures that breaks are only added if the difference
between postBreak and currentLineWidth is significant.
Fixes https://github.com/flutter/flutter/issues/65419
Cleans up header order/grouping for consistency: associated header, C/C++ system/standard library headers, library headers, platform-specific #includes.
Adds <cstring> where strlen, memcpy are being used: there are a bunch of places we use them transitively.
Applies linter-required cleanups. Disables linter on one file due to included RapidJson header. See https://github.com/flutter/flutter/issues/65676
This patch does not cover flutter/shell/platform/darwin. There's a separate, slightly more intensive cleanup for those in progress.
We currently use a mix of C standard includes (e.g. limits.h) and their
C++ variants (e.g. climits). This migrates to a consistent style for all
cases where the C++ variants are acceptable, but leaves the C
equivalents in place where they are required, such as in the embedder
API and other headers that may be used from C.
Add copyright headers in a few files where they were missing.
Trim trailing blank comment line where present, for consistency with
other engine code.
Use the standard libtxt copyright header in one file where it differed
(extra (C) and comma compared to other files in libtxt).
This also amends tools/const_finder/test/const_finder_test.dart to look
for a const an additional four lines down to account for the copyright
header added to the test fixture.
Tweak the primary flutter build rule so that fuchsia is more similar to
other platforms in how tests and the shell are built.
Only embedder_unittests and GLFW tests are disabled on Fuchsia now.
TEST: Ran unittests on host/fuchsia; workstation on fuchsia
BUG: fxb/53847, fxb/54056
This patch optimizes C++11 range-based for loops where the variable is
copied in each iteration but it would suffice to obtain it by const
reference. This is only applied to loop variables of types that are
expensive to copy which means they are not trivially copyable or have a
non-trivial copy constructor or destructor.
To ensure that it is safe to replace the copy with a const reference
only the following cases are modified:
* The loop variable is const-qualified.
* The loop variable is not const, but only const methods or operators
are invoked on it, or it is used as const reference or value argument
in constructors or function calls.
This is an application of the internal performance-for-range-copy
clang-tidy analysis.
* "Reland Clang 11, roll buildroot to 1bc40a5f916adb93d87e2a2230a0ec43db876c1c, take 4 (#17467)" (#17482)"
This reverts commit 8166a91bca11b83c16fba8f8fd407e937a2ac89c.
* format code
* Roll buildroot to 3a27de1c5bb0f50be7d3efe3e00de4f6068c9f30
On Linux, there is rarely just one default font that can reasonably be expected to be on the platform. This PR changes the GetDefaultFontFamily call to be GetDefaultFontFamilies, and it now returns a vector<string> so that the font collection code can look up all of them, and if any of them exist, add them to the fallback list.
For Linux, I supplied the list "Ubuntu", "Cantarell", "DejaVu Sans", "Liberation Sans", and "Arial", which should cover a large proportion of linux machines. For the other platforms, I supplied a list of length one, containing the one fallback font that used to be defined. On Windows, I added "Segoe UI" as a default, since that is the default system font on newer Windows.
The goal of this function is to provide at least one font family that is installed, since otherwise linux (or any platform) will just have no font at all if the default font isn't found.
Targeted suppression of some deprecation warnings that are build errors under
clang:
- Ignore the deprecation of codecvt's unicode conversion until we decide on
a replacement strategy.
- Allow the deprecated posix names of functions in third_party/txt.
Part of https://github.com/flutter/flutter/issues/16256
This was only necessary when the Engine had to build in multiple buildroots
where the sources where checked out at different paths relative to the
buildroot. This is no longer the case and there are already cases GN rules
have been written that mix and match variable usage with the direct
specification of the path to the Flutter sources relative to the sole buildroot.
This will improve font matching for SkParagraph, which relies on the
FontStyleSet's matchStyle implementation to find the closest match for a
FontStyle.
If a new fallback font is discovered during paragraph layout, the fallback
font cache in txt::FontCollection will use that font in future layouts.
However, that cache is not available if the new fallback font needs to be
used for other characters within the current layout. This PR adds a cache
to minikin::FontCollection and checks whether fonts in the cache can handle
a character before calling the fallback font provider.
See https://github.com/flutter/engine/pull/13257
