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https://github.com/LadybirdBrowser/ladybird.git
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2a021a35fc
We create labels in the Browser from text on web documents, which may use carriage returns. LibGfx will split lines on CR already, but LibGUI would not consider CRs when computing the height of the containing widget. The result was text that would not fit in the label's box.
118 lines
3.1 KiB
C++
118 lines
3.1 KiB
C++
/*
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* Copyright (c) 2018-2023, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2022, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Utf8View.h>
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#include <LibGUI/Label.h>
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#include <LibGUI/Painter.h>
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#include <LibGfx/Bitmap.h>
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#include <LibGfx/Palette.h>
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#include <LibGfx/TextWrapping.h>
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REGISTER_WIDGET(GUI, Label)
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namespace GUI {
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Label::Label(String text)
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: m_text(move(text))
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{
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REGISTER_TEXT_ALIGNMENT_PROPERTY("text_alignment", text_alignment, set_text_alignment);
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REGISTER_TEXT_WRAPPING_PROPERTY("text_wrapping", text_wrapping, set_text_wrapping);
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set_preferred_size({ SpecialDimension::OpportunisticGrow });
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set_min_size({ SpecialDimension::Shrink });
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set_frame_style(Gfx::FrameStyle::NoFrame);
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set_foreground_role(Gfx::ColorRole::WindowText);
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REGISTER_STRING_PROPERTY("text", text, set_text);
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REGISTER_BOOL_PROPERTY("autosize", is_autosize, set_autosize);
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}
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void Label::set_autosize(bool autosize, size_t padding)
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{
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if (m_autosize == autosize && m_autosize_padding == padding)
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return;
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m_autosize = autosize;
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m_autosize_padding = padding;
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if (m_autosize)
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size_to_fit();
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}
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void Label::set_text(String text)
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{
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if (text == m_text)
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return;
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m_text = move(text);
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if (m_autosize)
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size_to_fit();
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update();
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did_change_text();
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}
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Gfx::IntRect Label::text_rect() const
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{
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return frame_inner_rect().shrunken(frame_thickness() > 0 ? font().glyph_width('x') : 0, 0);
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}
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void Label::paint_event(PaintEvent& event)
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{
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Frame::paint_event(event);
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Painter painter(*this);
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painter.add_clip_rect(event.rect());
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if (text().is_empty())
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return;
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auto text_rect = this->text_rect();
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if (is_enabled()) {
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painter.draw_text(text_rect, text(), text_alignment(), palette().color(foreground_role()), Gfx::TextElision::Right, text_wrapping());
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} else {
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painter.draw_text(text_rect.translated(1, 1), text(), font(), text_alignment(), palette().disabled_text_back(), Gfx::TextElision::Right, text_wrapping());
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painter.draw_text(text_rect, text(), font(), text_alignment(), palette().disabled_text_front(), Gfx::TextElision::Right, text_wrapping());
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}
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}
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void Label::did_change_font()
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{
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if (m_autosize)
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size_to_fit();
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}
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void Label::size_to_fit()
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{
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set_fixed_width(text_calculated_preferred_width());
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set_fixed_height(text_calculated_preferred_height());
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}
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int Label::text_calculated_preferred_width() const
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{
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return font().width_rounded_up(m_text) + m_autosize_padding * 2;
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}
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int Label::text_calculated_preferred_height() const
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{
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return static_cast<int>(ceilf(font().preferred_line_height()) * m_text.bytes_as_string_view().count_lines());
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}
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Optional<UISize> Label::calculated_preferred_size() const
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{
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return GUI::UISize(text_calculated_preferred_width(), text_calculated_preferred_height());
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}
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Optional<UISize> Label::calculated_min_size() const
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{
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int frame = frame_thickness() * 2;
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int width = font().width_rounded_up("..."sv) + frame;
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int height = font().pixel_size_rounded_up() + frame;
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height = max(height, 22);
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return UISize(width, height);
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}
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}
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