mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-22 15:40:19 +00:00
222 lines
8.5 KiB
C++
222 lines
8.5 KiB
C++
/*
|
|
* Copyright (c) 2024, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <LibWeb/DOM/Range.h>
|
|
#include <LibWeb/HTML/FormAssociatedElement.h>
|
|
#include <LibWeb/HTML/HTMLInputElement.h>
|
|
#include <LibWeb/HTML/HTMLTextAreaElement.h>
|
|
#include <LibWeb/Layout/Viewport.h>
|
|
#include <LibWeb/Painting/PaintableBox.h>
|
|
#include <LibWeb/Painting/TextPaintable.h>
|
|
|
|
namespace Web::Painting {
|
|
|
|
PaintableFragment::PaintableFragment(Layout::LineBoxFragment const& fragment)
|
|
: m_layout_node(fragment.layout_node())
|
|
, m_offset(fragment.offset())
|
|
, m_size(fragment.size())
|
|
, m_baseline(fragment.baseline())
|
|
, m_start(fragment.start())
|
|
, m_length(fragment.length())
|
|
, m_glyph_run(fragment.glyph_run())
|
|
, m_writing_mode(fragment.writing_mode())
|
|
{
|
|
}
|
|
|
|
CSSPixelRect const PaintableFragment::absolute_rect() const
|
|
{
|
|
CSSPixelRect rect { {}, size() };
|
|
auto const* containing_block = paintable().containing_block();
|
|
if (containing_block)
|
|
rect.set_location(containing_block->absolute_position());
|
|
rect.translate_by(offset());
|
|
return rect;
|
|
}
|
|
|
|
int PaintableFragment::text_index_at(CSSPixelPoint position) const
|
|
{
|
|
if (!is<TextPaintable>(paintable()))
|
|
return 0;
|
|
|
|
CSSPixels relative_inline_offset = [&]() {
|
|
switch (orientation()) {
|
|
case Gfx::Orientation::Horizontal:
|
|
return position.x() - absolute_rect().x();
|
|
case Gfx::Orientation::Vertical:
|
|
return position.y() - absolute_rect().y();
|
|
default:
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
}();
|
|
|
|
if (relative_inline_offset < 0)
|
|
return 0;
|
|
|
|
auto const& glyphs = m_glyph_run->glyphs();
|
|
for (size_t i = 0; i < glyphs.size(); ++i) {
|
|
auto glyph_position = CSSPixels::nearest_value_for(glyphs[i].position.x());
|
|
if (i + 1 < glyphs.size()) {
|
|
auto next_glyph_position = CSSPixels::nearest_value_for(glyphs[i + 1].position.x());
|
|
if (relative_inline_offset >= glyph_position && relative_inline_offset < next_glyph_position)
|
|
return m_start + i;
|
|
} else {
|
|
if (relative_inline_offset >= glyph_position)
|
|
return m_start + i;
|
|
}
|
|
}
|
|
|
|
return m_start + m_length;
|
|
}
|
|
CSSPixelRect PaintableFragment::range_rect(Gfx::Font const& font, size_t start_offset, size_t end_offset) const
|
|
{
|
|
if (paintable().selection_state() == Paintable::SelectionState::None)
|
|
return {};
|
|
|
|
if (paintable().selection_state() == Paintable::SelectionState::Full)
|
|
return absolute_rect();
|
|
|
|
// FIXME: m_start and m_length should be unsigned and then we won't need these casts.
|
|
auto const start_index = static_cast<unsigned>(m_start);
|
|
auto const end_index = static_cast<unsigned>(m_start) + static_cast<unsigned>(m_length);
|
|
|
|
auto text = string_view();
|
|
|
|
if (paintable().selection_state() == Paintable::SelectionState::StartAndEnd) {
|
|
// we are in the start/end node (both the same)
|
|
if (start_index > end_offset)
|
|
return {};
|
|
if (end_index < start_offset)
|
|
return {};
|
|
|
|
if (start_offset == end_offset)
|
|
return {};
|
|
|
|
auto selection_start_in_this_fragment = max(0, start_offset - m_start);
|
|
auto selection_end_in_this_fragment = min(m_length, end_offset - m_start);
|
|
auto pixel_distance_to_first_selected_character = CSSPixels::nearest_value_for(font.width(text.substring_view(0, selection_start_in_this_fragment)));
|
|
auto pixel_width_of_selection = CSSPixels::nearest_value_for(font.width(text.substring_view(selection_start_in_this_fragment, selection_end_in_this_fragment - selection_start_in_this_fragment))) + 1;
|
|
|
|
auto rect = absolute_rect();
|
|
switch (orientation()) {
|
|
case Gfx::Orientation::Horizontal:
|
|
rect.set_x(rect.x() + pixel_distance_to_first_selected_character);
|
|
rect.set_width(pixel_width_of_selection);
|
|
break;
|
|
case Gfx::Orientation::Vertical:
|
|
rect.set_y(rect.y() + pixel_distance_to_first_selected_character);
|
|
rect.set_height(pixel_width_of_selection);
|
|
break;
|
|
default:
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
|
|
return rect;
|
|
}
|
|
if (paintable().selection_state() == Paintable::SelectionState::Start) {
|
|
// we are in the start node
|
|
if (end_index < start_offset)
|
|
return {};
|
|
|
|
auto selection_start_in_this_fragment = max(0, start_offset - m_start);
|
|
auto selection_end_in_this_fragment = m_length;
|
|
auto pixel_distance_to_first_selected_character = CSSPixels::nearest_value_for(font.width(text.substring_view(0, selection_start_in_this_fragment)));
|
|
auto pixel_width_of_selection = CSSPixels::nearest_value_for(font.width(text.substring_view(selection_start_in_this_fragment, selection_end_in_this_fragment - selection_start_in_this_fragment))) + 1;
|
|
|
|
auto rect = absolute_rect();
|
|
switch (orientation()) {
|
|
case Gfx::Orientation::Horizontal:
|
|
rect.set_x(rect.x() + pixel_distance_to_first_selected_character);
|
|
rect.set_width(pixel_width_of_selection);
|
|
break;
|
|
case Gfx::Orientation::Vertical:
|
|
rect.set_y(rect.y() + pixel_distance_to_first_selected_character);
|
|
rect.set_height(pixel_width_of_selection);
|
|
break;
|
|
default:
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
|
|
return rect;
|
|
}
|
|
if (paintable().selection_state() == Paintable::SelectionState::End) {
|
|
// we are in the end node
|
|
if (start_index > end_offset)
|
|
return {};
|
|
|
|
auto selection_start_in_this_fragment = 0;
|
|
auto selection_end_in_this_fragment = min(end_offset - m_start, m_length);
|
|
auto pixel_distance_to_first_selected_character = CSSPixels::nearest_value_for(font.width(text.substring_view(0, selection_start_in_this_fragment)));
|
|
auto pixel_width_of_selection = CSSPixels::nearest_value_for(font.width(text.substring_view(selection_start_in_this_fragment, selection_end_in_this_fragment - selection_start_in_this_fragment))) + 1;
|
|
|
|
auto rect = absolute_rect();
|
|
switch (orientation()) {
|
|
case Gfx::Orientation::Horizontal:
|
|
rect.set_x(rect.x() + pixel_distance_to_first_selected_character);
|
|
rect.set_width(pixel_width_of_selection);
|
|
break;
|
|
case Gfx::Orientation::Vertical:
|
|
rect.set_y(rect.y() + pixel_distance_to_first_selected_character);
|
|
rect.set_height(pixel_width_of_selection);
|
|
break;
|
|
default:
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
|
|
return rect;
|
|
}
|
|
return {};
|
|
}
|
|
|
|
Gfx::Orientation PaintableFragment::orientation() const
|
|
{
|
|
switch (m_writing_mode) {
|
|
case CSS::WritingMode::HorizontalTb:
|
|
return Gfx::Orientation::Horizontal;
|
|
case CSS::WritingMode::VerticalRl:
|
|
case CSS::WritingMode::VerticalLr:
|
|
case CSS::WritingMode::SidewaysRl:
|
|
case CSS::WritingMode::SidewaysLr:
|
|
return Gfx::Orientation::Vertical;
|
|
default:
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
}
|
|
|
|
CSSPixelRect PaintableFragment::selection_rect(Gfx::Font const& font) const
|
|
{
|
|
if (auto const* focused_element = paintable().document().focused_element(); focused_element && is<HTML::FormAssociatedTextControlElement>(*focused_element)) {
|
|
HTML::FormAssociatedTextControlElement const* text_control_element = nullptr;
|
|
if (is<HTML::HTMLInputElement>(*focused_element)) {
|
|
text_control_element = static_cast<HTML::HTMLInputElement const*>(focused_element);
|
|
} else if (is<HTML::HTMLTextAreaElement>(*focused_element)) {
|
|
text_control_element = static_cast<HTML::HTMLTextAreaElement const*>(focused_element);
|
|
} else {
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
auto selection_start = text_control_element->selection_start();
|
|
auto selection_end = text_control_element->selection_end();
|
|
if (!selection_start.has_value() || !selection_end.has_value())
|
|
return {};
|
|
return range_rect(font, selection_start.value(), selection_end.value());
|
|
}
|
|
auto selection = paintable().document().get_selection();
|
|
if (!selection)
|
|
return {};
|
|
auto range = selection->range();
|
|
if (!range)
|
|
return {};
|
|
|
|
return range_rect(font, range->start_offset(), range->end_offset());
|
|
}
|
|
|
|
StringView PaintableFragment::string_view() const
|
|
{
|
|
if (!is<TextPaintable>(paintable()))
|
|
return {};
|
|
return static_cast<TextPaintable const&>(paintable()).text_for_rendering().bytes_as_string_view().substring_view(m_start, m_length);
|
|
}
|
|
|
|
}
|