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LibGUI: Expand underline support for Spans in TextEditor

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To achieve this, some of the lambdas got shifted around and the new
attributes are respected.
This commit is contained in:
Tobias Christiansen 2022-01-20 19:59:44 +01:00 committed by Ali Mohammad Pur
parent ece59948c3
commit 5348c67ba4
Notes: sideshowbarker 2024-07-17 20:58:35 +09:00 
Author: https://github.com/TobyAsE
Commit: https://github.com/SerenityOS/serenity/commit/5348c67ba49
Pull-request: https://github.com/SerenityOS/serenity/pull/12027
Reviewed-by: https://github.com/AtkinsSJ
Reviewed-by: https://github.com/alimpfard
1 changed files with 19 additions and 17 deletions
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36
Userland/Libraries/LibGUI/TextEditor.cpp
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@ -401,11 +401,17 @@ void TextEditor::paint_event(PaintEvent& event)
// NOTE: This lambda and TextEditor::text_width_for_font() are used to substitute all glyphs with m_substitution_code_point if necessary.
// Painter::draw_text() and Gfx::Font::width() should not be called directly, but using this lambda and TextEditor::text_width_for_font().
auto draw_text = [&](Gfx::IntRect const& rect, auto const& raw_text, Gfx::Font const& font, Gfx::TextAlignment alignment, Gfx::Color color, bool substitue = true) {
auto draw_text = [&](Gfx::IntRect const& rect, auto const& raw_text, Gfx::Font const& font, Gfx::TextAlignment alignment, Gfx::TextAttributes attributes, bool substitue = true) {
if (m_substitution_code_point && substitue) {
painter.draw_text(rect, substitution_code_point_view(raw_text.length()), font, alignment, color);
painter.draw_text(rect, substitution_code_point_view(raw_text.length()), font, alignment, attributes.color);
} else {
painter.draw_text(rect, raw_text, font, alignment, color);
painter.draw_text(rect, raw_text, font, alignment, attributes.color);
}
if (attributes.underline) {
if (attributes.underline_style == Gfx::TextAttributes::UnderlineStyle::Solid)
painter.draw_line(rect.bottom_left().translated(0, 1), rect.bottom_right().translated(0, 1), attributes.underline_color.value_or(attributes.color));
if (attributes.underline_style == Gfx::TextAttributes::UnderlineStyle::Wavy)
painter.draw_triangle_wave(rect.bottom_left().translated(0, 1), rect.bottom_right().translated(0, 1), attributes.underline_color.value_or(attributes.color), 2);
}
};
@ -518,13 +524,13 @@ void TextEditor::paint_event(PaintEvent& event)
if (!placeholder().is_empty() && document().is_empty() && line_index == 0) {
auto line_rect = visual_line_rect;
line_rect.set_width(text_width_for_font(placeholder(), font()));
draw_text(line_rect, placeholder(), font(), m_text_alignment, palette().color(Gfx::ColorRole::PlaceholderText), false);
draw_text(line_rect, placeholder(), font(), m_text_alignment, { palette().color(Gfx::ColorRole::PlaceholderText) }, false);
} else if (!document().has_spans()) {
// Fast-path for plain text
auto color = palette().color(is_enabled() ? foreground_role() : Gfx::ColorRole::DisabledText);
if (is_displayonly() && is_focused())
color = palette().color(is_enabled() ? Gfx::ColorRole::SelectionText : Gfx::ColorRole::DisabledText);
draw_text(visual_line_rect, visual_line_text, font(), m_text_alignment, color);
draw_text(visual_line_rect, visual_line_text, font(), m_text_alignment, { color });
} else {
auto unspanned_color = palette().color(is_enabled() ? foreground_role() : Gfx::ColorRole::DisabledText);
if (is_displayonly() && is_focused())
@ -534,20 +540,16 @@ void TextEditor::paint_event(PaintEvent& event)
size_t next_column = 0;
Gfx::IntRect span_rect = { visual_line_rect.location(), { 0, line_height() } };
auto draw_text_helper = [&](size_t start, size_t end, RefPtr<Gfx::Font>& font, Color& color, Optional<Color> background_color = {}, bool underline = false) {
auto draw_text_helper = [&](size_t start, size_t end, RefPtr<Gfx::Font>& font, Gfx::TextAttributes text_attributes) {
size_t length = end - start;
if (length == 0)
return;
auto text = visual_line_text.substring_view(start, length);
span_rect.set_width(font->width(text));
if (background_color.has_value()) {
painter.fill_rect(span_rect, background_color.value());
if (text_attributes.background_color.has_value()) {
painter.fill_rect(span_rect, text_attributes.background_color.value());
}
draw_text(span_rect, text, *font, m_text_alignment, color);
if (underline) {
painter.draw_line(span_rect.bottom_left().translated(0, 1), span_rect.bottom_right().translated(0, 1), color);
}
span_rect.translate_by(span_rect.width(), 0);
draw_text(span_rect, text, *font, m_text_alignment, text_attributes);
};
for (;;) {
if (span_index >= document().spans().size()) {
@ -602,14 +604,14 @@ void TextEditor::paint_event(PaintEvent& event)
if (span_start != next_column) {
// draw unspanned text between spans
draw_text_helper(next_column, span_start, unspanned_font, unspanned_color);
draw_text_helper(next_column, span_start, unspanned_font, { unspanned_color });
}
auto font = unspanned_font;
if (span.attributes.bold) {
if (auto bold_font = Gfx::FontDatabase::the().get(font->family(), font->presentation_size(), 700))
font = bold_font;
}
draw_text_helper(span_start, span_end, font, span.attributes.color, span.attributes.background_color, span.attributes.underline);
draw_text_helper(span_start, span_end, font, span.attributes);
next_column = span_end;
if (!span_consumned) {
// continue with same span on next line
@ -620,7 +622,7 @@ void TextEditor::paint_event(PaintEvent& event)
}
// draw unspanned text after last span
if (next_column < visual_line_text.length()) {
draw_text_helper(next_column, visual_line_text.length(), unspanned_font, unspanned_color);
draw_text_helper(next_column, visual_line_text.length(), unspanned_font, { unspanned_color });
}
// consume all spans that should end this line
// this is necessary since the spans can include the new line character
@ -704,7 +706,7 @@ void TextEditor::paint_event(PaintEvent& event)
end_of_selection_within_visual_line - start_of_selection_within_visual_line
};
draw_text(selection_rect, visual_selected_text, font(), Gfx::TextAlignment::CenterLeft, text_color);
draw_text(selection_rect, visual_selected_text, font(), Gfx::TextAlignment::CenterLeft, { text_color });
}
}
}