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The earlier method of using bounding boxes does not work if the
characters have sufficiently large kerning, such as 'A Java' or
sufficiently small kerning, such as '16'.
Also, don't add spaces after hyphens or dashes, and detect
baseline changes correctly. Reset the first space condition once
text is clipped out.
http://b/2457350
http://b/2165553
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Drawing elements that appear atop or below layers need to be
drawn both in the proper order and with the correct canvas to
respect clipping and the matrix.
Drawing the find results, text selection, or the cursor ring,
interleaves with any layers that may be drawn. The main picture
is treated as owned by a LayerAndroid so each component can
decide when to draw.
This change leave the main picture in WebViewCore.cpp, and
draws everything else in WebView.cpp -- in the future, additional
refactoring can put all drawing in one place.
The logic of what to draw is still in WebView.java, but the
actual drawing calls are now triggered inside the layer code.
Android.mk
- Add rule to trigger building without layers from buildspec.mk.
LayerAndroid.*
- Replace FindOnPage reference with abstract DrawExtra class to
draw adornments in the layers' canvas context.
- Add a LayerAndroid constructor to create a dummy layer with a
SkPicture* and a uniqueId==-1 so that extras can detect when
they are drawn by the main picture.
android_graphics.*
- Move cursor ring drawing out of WebView.cpp to here.
- Separate cursor ring setup from actual drawing.
- Get the cursor ring metrics in local coordinates.
ChromeClientAndroid.cpp
- Fix compiler warnings.
WebViewCore.*
- Move updateCursorBounds from WebView.cpp. This permits it to
be called from CursorRing::setup.
CachedFrame.*
CachedNode.*
CachedLayer.*
- Add local bounds getters.
CachedRoot.h
- Move class FindCanvas to the android namespace.
DrawExtra.h
- Add an abstract class called by LayerAndroid to optionally
draw extra elements in its canvas context.
FindCanvas.*
SelectText.*
- Refactor drawing to draw in layers context.
WebView.cpp
- Move drawing from WebView.java.
- Remove selection code to SelectText.cpp.
- Use inverseScale to simplify viewPort metrics.
- Simplify layer root so java doesn't need to know about it.
Requires companion change in frameworks/base
http://b/2457316
http://b/2454127
http://b/2454149
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The deleted code extracted the selected text from the WebKit DOM
by looking for text in the render tree that matched the selection
region. This has never worked well.
The replacement approach matches the glyphs in the picture instead.
- WebViewCore.*
Remove getSelection() and supporting routines. Part of the deleted
code looked for punctuation between segments to add space characters
that might not be present in the markup. There's no equivalent in
the replacement code; it uses spacial gaps to detect the need to
add extra spaces.
- SelectText.*
Match the text to the selected region and convert the glyph to
unicode. The tricky part is that spaces need to be inserted into
the string when there are gaps in the text.
- WebView.cpp
Return the selection as a string to the java caller instead
of a region.
To convert the glyphs into text, a companion change was made to
external/skia. To update the UI thread/webkit thread messaging, a
companion change was also made to frameworks/base.
Fixes http://b/2166748
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These files have not yet been upstreamed to webkit.org.
WebKit requires either a BSD-style or LGPL 2.1 license for all code.
We use a BSD-style 2-clause license for Android-specific files that will be upstreamed to webkit.org.
This change adds licenses where absent or simply fixes the names of copyright holders in the license
text to 'THE COPYRIGHT OWNER' and cleans up formatting.
Files in stl/ currently use licenses other than BSD-style and will require more careful treatment.
Change-Id: I67ad4b8932e432d3eaaeecdfeb0d09418496228d
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