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Replace Cairo Toy Text with Pango#389

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ForLoveOfCats wants to merge 43 commits intolinebender:masterlinebender/piet:masterfrom ForLoveOfCats:PangoWrappingForLoveOfCats/piet:PangoWrappingCopy head branch name to clipboard

+475-904

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Commits on Mar 10, 2021

• Start getting rich text drawing with Pango

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  3aff350

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• Hook up some word wrap

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  302b331

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• Start building LineMetric from Pango provided data

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• Get hit testing hooked up with Pango

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  20cdca5

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• Generate decent line metrics from Pango data

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  72ebbb4

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• Add note to load_font for Pango

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  74de3c9

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• Plumb in all remaining range attributes to Pango

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• Use UnicodeSegmentation to determine trailing index instead of Pango

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  1135fdc

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• Plumb in text alignment to Pango

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  7ff977e

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• Fix Pango font size being much to large

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  b103953

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• Fix Pango wrapping for trailing_whitespace_width text

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  990d5f0

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• Remove dead code from old Cairo toy text based implementation

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  4d0fc60

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• Cleanup some comments in Pango wrapping code

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  0e2aeb8

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• Include newline char(s) in line metrics built from Pango

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  d7c03ce

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• Add comment on unsafe block getting Pango line layout offsets

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  28bfa6a

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• Do PangoAttribute building on AttributeWithRange & simplify font failure

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  75cec53

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• Update comment on Pango alignment wrt left-to-right text

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  0a50775

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• Don't munch blank lines when including newlines in line metric

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• Count UTF-8 bytes instead of codepoints (including newline chars

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  1bfeaa5

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• Use PangoLayoutIter to get baseline information

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  222a66f

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• Fix eol_hit_testing under Pango & improve baseline calculation

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  939e419

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• Use whitespaceless logical width for overall layout width

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• Use layout ink size for image_bounds

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• Prevent preferring downstream affinity with no following metrics

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  8caea72

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• Ignore trailing ws when finding metric for checking newline affinity

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  8a267c3

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• Make empty_layout_size test slightly more tolerant

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  af3812c

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• Fix test_hit_test_point_basic_0

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  5f65df0

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• Fix test_multiline_hit_test_point_basic

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  fb02828

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• Fix test_hit_test_point_complex_0

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  d2bc44c

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• Take logical rect offset into account for paint & idx hit tests

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  db924dd

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• Don't use GraphemeCursor to handling trailing hit test

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• Take logical rect offset into account for point hit test

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Commits on Mar 13, 2021

• Cleanup CairoTextLayout and make it cheaper to clone

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  09b6801

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• Improve some comments

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  7530363

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• Add UNBOUNDED_WRAP_WIDTH constant

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• Add FIXME to empty_layout_size test

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• Make text color conversion slightly less weird

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  2466740

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• Use our own copy of layout text instead of asking Pango for it

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  01b0460

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• Slightly improve comments/logic when moving to new line at soft break

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  cf381e6

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• Improve point hit test metric lookup logic

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  7189f14

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• Update piet-snapshots submodule

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Commits on Mar 22, 2021

• Disable Pango hyphenation

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  cf3f375

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• Use WrapMode::WordChar

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