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Libraries: Move to Userland/Libraries/
This commit is contained in:
Andreas Kling
parent
dc28c07fa5
commit
13d7c09125
1857 changed files with 266 additions and 274 deletions
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/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/Utf8View.h>
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#include <LibGUI/Painter.h>
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#include <LibWeb/Layout/InitialContainingBlockBox.h>
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#include <LibWeb/Layout/LineBoxFragment.h>
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#include <LibWeb/Layout/TextNode.h>
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#include <LibWeb/Painting/BorderPainting.h>
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#include <LibWeb/Painting/PaintContext.h>
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#include <ctype.h>
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namespace Web::Layout {
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void LineBoxFragment::paint(PaintContext& context, PaintPhase phase)
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{
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for (auto* ancestor = layout_node().parent(); ancestor; ancestor = ancestor->parent()) {
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if (!ancestor->is_visible())
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return;
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}
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layout_node().paint_fragment(context, *this, phase);
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}
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bool LineBoxFragment::ends_in_whitespace() const
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{
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auto text = this->text();
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if (text.is_empty())
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return false;
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return isspace(text[text.length() - 1]);
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}
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bool LineBoxFragment::is_justifiable_whitespace() const
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{
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return text() == " ";
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}
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StringView LineBoxFragment::text() const
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{
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if (!is<TextNode>(layout_node()))
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return {};
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return downcast<TextNode>(layout_node()).text_for_rendering().substring_view(m_start, m_length);
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}
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const Gfx::FloatRect LineBoxFragment::absolute_rect() const
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{
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Gfx::FloatRect rect { {}, size() };
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rect.set_location(m_layout_node.containing_block()->absolute_position());
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rect.move_by(offset());
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return rect;
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}
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int LineBoxFragment::text_index_at(float x) const
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{
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if (!is<TextNode>(layout_node()))
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return 0;
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auto& layout_text = downcast<TextNode>(layout_node());
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auto& font = layout_text.font();
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Utf8View view(text());
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float relative_x = x - absolute_x();
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float glyph_spacing = font.glyph_spacing();
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if (relative_x < 0)
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return 0;
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float width_so_far = 0;
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for (auto it = view.begin(); it != view.end(); ++it) {
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float glyph_width = font.glyph_or_emoji_width(*it);
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if ((width_so_far + (glyph_width + glyph_spacing) / 2) > relative_x)
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return m_start + view.byte_offset_of(it);
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width_so_far += glyph_width + glyph_spacing;
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}
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return m_start + m_length;
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}
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Gfx::FloatRect LineBoxFragment::selection_rect(const Gfx::Font& font) const
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{
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if (layout_node().selection_state() == Node::SelectionState::None)
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return {};
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if (layout_node().selection_state() == Node::SelectionState::Full)
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return absolute_rect();
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auto selection = layout_node().root().selection().normalized();
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if (!selection.is_valid())
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return {};
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if (!is<TextNode>(layout_node()))
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return {};
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const auto start_index = m_start;
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const auto end_index = m_start + m_length;
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auto text = this->text();
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if (layout_node().selection_state() == Node::SelectionState::StartAndEnd) {
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// we are in the start/end node (both the same)
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if (start_index > selection.end().index_in_node)
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return {};
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if (end_index < selection.start().index_in_node)
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return {};
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if (selection.start().index_in_node == selection.end().index_in_node)
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return {};
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auto selection_start_in_this_fragment = max(0, selection.start().index_in_node - m_start);
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auto selection_end_in_this_fragment = min(m_length, selection.end().index_in_node - m_start);
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auto pixel_distance_to_first_selected_character = font.width(text.substring_view(0, selection_start_in_this_fragment));
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auto pixel_width_of_selection = font.width(text.substring_view(selection_start_in_this_fragment, selection_end_in_this_fragment - selection_start_in_this_fragment)) + 1;
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auto rect = absolute_rect();
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rect.set_x(rect.x() + pixel_distance_to_first_selected_character);
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rect.set_width(pixel_width_of_selection);
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return rect;
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}
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if (layout_node().selection_state() == Node::SelectionState::Start) {
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// we are in the start node
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if (end_index < selection.start().index_in_node)
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return {};
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auto selection_start_in_this_fragment = max(0, selection.start().index_in_node - m_start);
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auto selection_end_in_this_fragment = m_length;
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auto pixel_distance_to_first_selected_character = font.width(text.substring_view(0, selection_start_in_this_fragment));
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auto pixel_width_of_selection = font.width(text.substring_view(selection_start_in_this_fragment, selection_end_in_this_fragment - selection_start_in_this_fragment)) + 1;
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auto rect = absolute_rect();
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rect.set_x(rect.x() + pixel_distance_to_first_selected_character);
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rect.set_width(pixel_width_of_selection);
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return rect;
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}
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if (layout_node().selection_state() == Node::SelectionState::End) {
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// we are in the end node
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if (start_index > selection.end().index_in_node)
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return {};
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auto selection_start_in_this_fragment = 0;
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auto selection_end_in_this_fragment = min(selection.end().index_in_node, m_length);
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auto pixel_distance_to_first_selected_character = font.width(text.substring_view(0, selection_start_in_this_fragment));
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auto pixel_width_of_selection = font.width(text.substring_view(selection_start_in_this_fragment, selection_end_in_this_fragment - selection_start_in_this_fragment)) + 1;
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auto rect = absolute_rect();
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rect.set_x(rect.x() + pixel_distance_to_first_selected_character);
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rect.set_width(pixel_width_of_selection);
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return rect;
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}
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return {};
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}
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}
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