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lyx_mirror/00README_STR_METRICS_BRANCH

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Add a readme file describing the state of the branch
2013-06-18 08:18:32 +00:00
This branch is where I (jmarc) try to implement string_wise metrics
computation. This is done through a series of cleanups. The expected
speed improvement will only be visible at the end of the road: indeed
for now we intend to keep unchanged behavior for testing purposes.
What is done:
* Make TextMetrics methods operate on Row objects: breakRow and
Implement real string width computation Important features: * widths are cached in a map * old behavior is still used when lyxrc.force_paint_single_char is true.
2013-06-25 06:18:25 +00:00
setRowHeight instead of rowBreakPoint and rowHeight.
Add a readme file describing the state of the branch
2013-06-18 08:18:32 +00:00
* change breakRow operation to operate on text strings on which
Handle boundary in getColumnNearX (and more) Use proper font everywhere for end-of-par marker Fix getColumnNearX for RTL text and for centered/right-justified paragraphs. Let computeRowMetrics update the row width.
2013-07-21 18:22:32 +00:00
metrics are computed. The list of elements is stored in the row
object in visual ordering, not logical.
Implement real string width computation Important features: * widths are cached in a map * old behavior is still used when lyxrc.force_paint_single_char is true.
2013-06-25 06:18:25 +00:00
Convert cursorX() and computeRowMetrics() to the new scheme * convert cursorX to new scheme; old computation is still there for the sake of comparison. * use Row to compute separator width in computeRowMetrics; again, the old code is retained for now. * Get rid of rowWidth()
2013-07-17 22:25:08 +00:00
* re-implement cursorX using row elements
Handle boundary in getColumnNearX (and more) Use proper font everywhere for end-of-par marker Fix getColumnNearX for RTL text and for centered/right-justified paragraphs. Let computeRowMetrics update the row width.
2013-07-21 18:22:32 +00:00
* re-implement getColumnNearX using row elements.
Re-implement getColumNearX using row elements The code is now so much shorter that it is scary... Expect that further changes will be necessary Cursor boundary is not handled yet.
2013-07-21 18:22:32 +00:00
Implement real string width computation Important features: * widths are cached in a map * old behavior is still used when lyxrc.force_paint_single_char is true.
2013-06-25 06:18:25 +00:00
* Implement proper string metrics computation (with cache), when
Re-implement getColumNearX using row elements The code is now so much shorter that it is scary... Expect that further changes will be necessary Cursor boundary is not handled yet.
2013-07-21 18:22:32 +00:00
lyxrc.force_paint_single_char is false. In this case, remove also
useless workarounds which disable kerning and ligatures.
Add a readme file describing the state of the branch
2013-06-18 08:18:32 +00:00
Next steps:
Implement real string width computation Important features: * widths are cached in a map * old behavior is still used when lyxrc.force_paint_single_char is true.
2013-06-25 06:18:25 +00:00
Convert cursorX() and computeRowMetrics() to the new scheme * convert cursorX to new scheme; old computation is still there for the sake of comparison. * use Row to compute separator width in computeRowMetrics; again, the old code is retained for now. * Get rid of rowWidth()
2013-07-17 22:25:08 +00:00
* get rid of old code of cursorX and getColumnNearX (which have been
Handle boundary in getColumnNearX (and more) Use proper font everywhere for end-of-par marker Fix getColumnNearX for RTL text and for centered/right-justified paragraphs. Let computeRowMetrics update the row width.
2013-07-21 18:22:32 +00:00
kept for comparison purpose, guarded with KEEP_OLD_METRICS_CODE in
order to check computations).
Implement real string width computation Important features: * widths are cached in a map * old behavior is still used when lyxrc.force_paint_single_char is true.
2013-06-25 06:18:25 +00:00
* re-implement row painting using row elements (can it be done?)
Add a readme file describing the state of the branch
2013-06-18 08:18:32 +00:00
* profile and see how performance can be improved.
Convert cursorX() and computeRowMetrics() to the new scheme * convert cursorX to new scheme; old computation is still there for the sake of comparison. * use Row to compute separator width in computeRowMetrics; again, the old code is retained for now. * Get rid of rowWidth()
2013-07-17 22:25:08 +00:00
* Document the code
Handle boundary in getColumnNearX (and more) Use proper font everywhere for end-of-par marker Fix getColumnNearX for RTL text and for centered/right-justified paragraphs. Let computeRowMetrics update the row width.
2013-07-21 18:22:32 +00:00
Difference in behavior (aka bug fixes)
Add a readme file describing the state of the branch
2013-06-18 08:18:32 +00:00
* end of paragraph markers metrics are computed with the font of the
Handle boundary in getColumnNearX (and more) Use proper font everywhere for end-of-par marker Fix getColumnNearX for RTL text and for centered/right-justified paragraphs. Let computeRowMetrics update the row width.
2013-07-21 18:22:32 +00:00
actual text, not default font.
Add a readme file describing the state of the branch
2013-06-18 08:18:32 +00:00
Handle boundary in getColumnNearX (and more) Use proper font everywhere for end-of-par marker Fix getColumnNearX for RTL text and for centered/right-justified paragraphs. Let computeRowMetrics update the row width.
2013-07-21 18:22:32 +00:00
* When cursor is after a LTR separator just before a RTL chunk, the
Convert cursorX() and computeRowMetrics() to the new scheme * convert cursorX to new scheme; old computation is still there for the sake of comparison. * use Row to compute separator width in computeRowMetrics; again, the old code is retained for now. * Get rid of rowWidth()
2013-07-17 22:25:08 +00:00
cursor posiiton is computed better with the new code.
Handle boundary in getColumnNearX (and more) Use proper font everywhere for end-of-par marker Fix getColumnNearX for RTL text and for centered/right-justified paragraphs. Let computeRowMetrics update the row width.
2013-07-21 18:22:32 +00:00
Other differences (aka real bugs)
Implement proper handling of RtL in Rows Now the row elements are sorted according to RtL/LtR. Some additional cleanup.
2013-07-16 22:59:34 +00:00
* words longer than the screen are no monger broken at an arbitrary
point. This is a problem for languages like chinese that do not use
separators.
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