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path: root/src/ui/text.c
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2021-09-12Mobile: Draw optimizations; focus handlingJaakko Keränen
Widgets can now be marked for buffering their contents, which is useful if their contents change seldom but they are drawn often. For example, the navbar is always visible but doesn't change very often, and during animations menu contents are static but there is a moving animation so everything gets drawn 60 FPS. Focus handling was also improved so the lookup results can be scrolled while entering text, and one can tap outside an input field to unfocus it.
2021-08-25Merge branch 'dev' into work/v1.7Jaakko Keränen
# Conflicts: # CMakeLists.txt # res/about/version.gmi
2021-08-24Text: Character hit test vs. clustersJaakko Keränen
When multiple codepoints are in the same cluster, the hit test should only consider the first codepoint of the cluster, or otherwise the cursor is positioned somewhere in the middle of the cluster and not at the start.
2021-08-24InputWidget: Reverted an earlier change to fix cursor movement regressionJaakko Keränen
In word-wrapped lines, a character will be hit multiple times and the latest hit is what counts.
2021-08-20Added build options to force phone/tablet mobile UIJaakko Keränen
These options are mostly useful on mobile platforms that are not iOS or Android, and for testing purposes.
2021-08-20CleanupJaakko Keränen
2021-08-19InputWidget: Cursor behavior around invisible codepointsJaakko Keränen
Emoji variation selectors would confuse cursor positioning and insertion behavior, breaking the assumption that each line ends with a single newline.
2021-08-02Text: Fixed drawing wrapped text without HarfBuzzJaakko Keränen
2021-07-23InputWidget: Buffer contents not activeJaakko Keränen
2021-07-22CleanupJaakko Keränen
2021-07-22InputWidget: Sensitive input modeJaakko Keränen
At a low level when measuring/drawing text, replace all characters with an override character.
2021-07-21InputWidget: Fixed and reliabilityJaakko Keränen
Cursor movement and pasting.
2021-07-21InputWidget: Fixed coord-based positioningJaakko Keränen
2021-07-21Text: Finding the advance position of a characterJaakko Keränen
2021-07-21Revising InputWidget (continued)Jaakko Keränen
Finding cursor position via coordinates. Handling the mark. Visual wrapped lines vs. content lines. Vertical scrolling inside the visual range.
2021-07-20Text: Hit testing during a text runJaakko Keränen
2021-07-20Revising InputWidgetJaakko Keränen
`InputWidget` needs to be better at handling multiple lines. The previous implementation assumed that the content was short enough to be fully redrawn each frame, which is not a great idea when you have thousands of lines.
2021-07-15Fixing regressions text metrics, InputWidgetJaakko Keränen
`run_Font_` was moving the Y cursor position twice for each line break. Checking for the HarfBuzz UNSAFE_TO_BREAK flag leads to some unexpected behavior near edges of words. The old `tryAdvanceNoWrap` method should return the maximum horizontal advance of the text, and not the cursor position's advance. `draw_WrapText` used the wrong foreground color. `TextBuf` now uses WrapText to do all the measuring and drawing, making things much simpler.
2021-07-15GmDocument: Right-align RTL decorationsJaakko Keränen
2021-07-14Text: Detect Arabic scriptJaakko Keränen
It appears HarfBuzz's script autodetection isn't working here for Arabic.
2021-07-14Fixed text wrapping when HarfBuzz is disabledJaakko Keränen
Updated the old simple text renderer for the new WrapText wrapping.
2021-07-14Text: Ordering runs vs. paragraph/run directionJaakko Keränen
2021-07-14CleanupJaakko Keränen
2021-07-13Drawing document RTL text runsJaakko Keränen
The base text direction of each line of text is determined when the document is laid out. When drawing runs, use this predetermined base direction.
2021-07-13Text: Bidi text wrappingJaakko Keränen
There is still some weirdness with wraps that occur inside a bidi region. The problem is that text drawing is done later, in smaller segments, without knowledge of the paragraph base direction. The base direction should be saved into each GmRun as a flag.
2021-07-13Text: Working on bidi text wrappingJaakko Keränen
2021-07-06Text run measurement API change; bug fixesJaakko Keränen
The distinction between measure_Text and advance_Text was not very clear. Now there are only measure_Text functions that return both the bounds and the cursor position advancement, and the appropriate metrics are used by the caller.
2021-07-04CleanupJaakko Keränen
2021-07-04Text: Apply FriBidi (again); fixed wrapping bugsJaakko Keränen
2021-07-04Text: Refactoring AttributedTextJaakko Keränen
AttributedText converts the text to a visual UTF-32 string. This allows it to be processed in a more straightforward fashion, and the indirection allows reordering via FriBidi.
2021-07-04Text: Adjusted Noto Symbols scalingJaakko Keränen
2021-07-04Text: Right-align RTL text linesJaakko Keränen
2021-07-03Added build options for HarfBuzz and FriBidiJaakko Keränen
Allow using both `pkg-config` provided libraries for local builds, and configuring more minimal versions for distribution. HarfBuzz has a bunch of dependencies by default. TODO: ENABLE_FRIBIDI_BUILD should cause a static library to be built.
2021-07-03Text: Use FriBidi for visual orderJaakko Keränen
Todo: This seems a little late in the game. The reordering should be done for each paragraph of text.
2021-07-03Text: CleanupJaakko Keränen
2021-07-02Text: Monospace glyph fitting; trying out soft hyphensJaakko Keränen
If glyphs are borrowed from a different font, the offset/advance are adjusted to fit the correct monospacing (for pictographs/emoji).
2021-07-02Text: Keep Nunito Italic kerning as-isJaakko Keränen
2021-07-02Text: Skip space at word wrap positionJaakko Keränen
2021-07-02CleanupJaakko Keränen
2021-07-02Text: Nunito kerning adjustmentJaakko Keränen
2021-07-02Text: Word wrapping; fixed glyph cachingJaakko Keränen
2021-07-01Text: Working on line wrappingJaakko Keränen
2021-07-01Text: Working on HarfBuzzJaakko Keränen
2021-06-30CleanupJaakko Keränen
2021-06-30Text: Internal and ANSI color escapesJaakko Keränen
2021-06-30Text: Use HarfBuzz to shape textJaakko Keränen
This kind of already works! HarfBuzz will composite glyphs as expected. Still missing: half-pixel offsets, line wrapping, color escapes, monospace grid alignment. FriBidi will still be required to determine/reorder text direction within each run.
2021-06-26Text: Link with HarfBuzz; old run_Font_ is a fallbackJaakko Keränen
HarfBuzz will provide proper Unicode text shaping for both simple and complex scripts. The old `run_Font_` is available for use as a fallback if HarfBuzz is not available due to size or complexity constraints (it's written in C++).
2021-06-25Merge branch 'dev' into work/v1.6Jaakko Keränen
# Conflicts: # CMakeLists.txt
2021-06-24Text: Tune kerning on NunitoJaakko Keränen
2021-06-15Text: Small font is semibold for legibilityJaakko Keränen