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| author | Doug Felt <dougfelt@google.com> | 2010-03-29 14:58:40 -0700 |
|---|---|---|
| committer | Doug Felt <dougfelt@google.com> | 2010-04-07 14:54:51 -0700 |
| commit | e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7a (patch) | |
| tree | 6af998e3ce59000a4edcf0a40e49e1eb9636acab /icu4j/license.html | |
| parent | 5d470d03df643801aa4eef11a26deee70da7b952 (diff) | |
| download | frameworks_base-e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7a.zip frameworks_base-e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7a.tar.gz frameworks_base-e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7a.tar.bz2 | |
Refactor Styled utility functions into reusable objects.
This takes utility functions from Styled and a few other classes and
incorporates them into two new utility classes, TextLine and
MeasuredText. The main point of this is to support shaping by skia,
to experiment with how this will look, this also introduces
character-based Arabic shaping.
MeasuredText is used by code that determines line breaks by generating
and examining character widths in logical order. Factoring the code
in this way makes it usable by the ellipsize functions in TextUtils as
well as by StaticLayout. This class takes over the caching of widths
and chars arrays that was previously performed by StyledText. A small
number of MeasuredText objects are themselves cached by the class and
accesed using static obtain and recycle methods. Generally only these
few cached instances are ever created.
TextLine is used by code that draws or measures text on a line. This
unifies the line measuring and rendering code, and pushes assumptions
about how rtl text is treated closer to the points where skia code is
invoked. TextLine implements the functions that were previously
provided by Styled, working on member arrays rather than
explicitly-passed arguments. It implements the same kind of static
cache as MeasuredText.
TextLine and MeasureText simulate arabic glyph generation and shaping
by using ArabicShaping, ported with very minor changes from ICU4J's
ArabicShaping. This class generates shaped Arabic glyphs and Lam-Alef
ligatures using Unicode presentation forms. ArabicShaping is not
intended to be permanent, but to be replaced by real shaping from the
skia layer. It is introduced in order to emulate the behavior of real
shaping so that higher level code dealing with rendering shaped text
and cursor movement over ligatures can be developed and tested; it
also provides basic-level support for Arabic.
Since cursor movement depends on conjuncts whose formation is
font-dependent, cursor movement code that was formerly in Layout and
StaticLayout was moved into TextLine so that it can work on the shaped
text.
Other than these changes, the other major change is a rework of the
ellipsize utility functions to combine multiple branches into fewer
branches with additional state.
Updated copyright notices on new files.
Change-Id: I492cb58b51f5aaf6f14cb1419bdbed49eac5ba29
Diffstat (limited to 'icu4j/license.html')
| -rw-r--r-- | icu4j/license.html | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/icu4j/license.html b/icu4j/license.html new file mode 100644 index 0000000..b905ddf --- /dev/null +++ b/icu4j/license.html @@ -0,0 +1,51 @@ +<html> + +<head> +<meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></meta> +<title>ICU License - ICU 1.8.1 and later</title> +</head> + +<body BGCOLOR="#ffffff"> +<h2>ICU License - ICU 1.8.1 and later</h2> + +<p>COPYRIGHT AND PERMISSION NOTICE</p> + +<p> +Copyright (c) 1995-2006 International Business Machines Corporation and others +</p> +<p> +All rights reserved. +</p> +<p> +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), +to deal in the Software without restriction, including without limitation +the rights to use, copy, modify, merge, publish, distribute, and/or sell +copies of the Software, and to permit persons +to whom the Software is furnished to do so, provided that the above +copyright notice(s) and this permission notice appear in all copies +of the Software and that both the above copyright notice(s) and this +permission notice appear in supporting documentation. +</p> +<p> +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, +INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A +PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO EVENT SHALL +THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, +OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER +RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, +NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE +USE OR PERFORMANCE OF THIS SOFTWARE. +</p> +<p> +Except as contained in this notice, the name of a copyright holder shall not be +used in advertising or otherwise to promote the sale, use or other dealings in +this Software without prior written authorization of the copyright holder. +</p> + +<hr> +<p><small> +All trademarks and registered trademarks mentioned herein are the property of their respective owners. +</small></p> +</body> +</html> |