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Update PAINTING_ANALYSIS and add a new task
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@ -58,15 +58,14 @@ The global idea would be to extend FitCursor to cover also horizontal
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cursor.
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* Proposals
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* Clean-up of drawing code
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The goal is to make painting with drawing disable fast enough that it
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can be used after every metrics computation. Then we can separate real
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drawing from metrics.
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Other changes are only clean-ups.
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** DONE RowPainter
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Inset position is set in paintInset, paintOnlyInsets, and paintText.
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@ -114,29 +113,14 @@ topBottomSpace parameter should be removed after that.
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The helper version should return a Row::Element instead of an InsetTable.
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** TODO make Inset::display() more useful
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** Do not make RowPainter operations update x_
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[This has been started in the features/betterbreak branch. Time will
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tell whether it really helps. The question in particular is the
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handling of separator insets]
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It is better to make them const and update x_ separately.
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Extending the DisplayType enum would allow to remove special cases
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from the code.
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The enumeration could be like
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: Inline = 0
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: BreakBefore = 1 // break row before this inset
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: BreakAfter = 2 // break row after this inset
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: CanBreakAfter = 4 // optionally break row after this inset
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: AlignLeft = 8
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: AlignRight = 16
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: NoBoundary = 32 // do not allow cursor to go at the end of the row
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: //before display inset
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: Display = BreakBefore|BreakAfter
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A display equation would be Display, other could be Display|AlignLeft
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BreakAfter can be used by Newline or separator insets
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CanBreakAfter can be used by the optional hyphen InsetSpecialChar.
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Then it will be possible to reorder the painting of the different
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elements. In particular, if text is painted last, it will be more
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visible in the presence of underlines (foreign language, change
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tracking, spell check).
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** Set inset position during metrics phase
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@ -222,12 +206,8 @@ update flag is Update::None.
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** Metrics computation
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This is triggered by bv::updateMetrics, which calls tm::redoParagraph for
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+ all visible paragraphs
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+ paragraph above the screen (up to one page)
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+ paragraphs below the screen (up to one page again)
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The paragraphs outside of the screen are required to make PageUp/Down
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work.
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all visible paragraphs. Paragraphs above or below the screen (needed
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for page up/down) and computed as needed.
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tm::redoParagraph will call Inset::metrics for each inset. In the case
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of text insets, this will invoke recursively tm::metrics, which redoes
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