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https://github.com/LadybirdBrowser/ladybird.git
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5d180d1f99
(...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED) Since all of these checks are done in release builds as well, let's rename them to VERIFY to prevent confusion, as everyone is used to assertions being compiled out in release. We can introduce a new ASSERT macro that is specifically for debug checks, but I'm doing this wholesale conversion first since we've accumulated thousands of these already, and it's not immediately obvious which ones are suitable for ASSERT.
348 lines
12 KiB
C++
348 lines
12 KiB
C++
/*
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* Copyright (c) 2020, Sergey Bugaev <bugaevc@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 <LibGUI/ColumnsView.h>
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#include <LibGUI/Model.h>
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#include <LibGUI/Painter.h>
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#include <LibGUI/ScrollBar.h>
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#include <LibGfx/CharacterBitmap.h>
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#include <LibGfx/Palette.h>
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namespace GUI {
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static const char* s_arrow_bitmap_data = {
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" "
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" # "
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" ## "
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" ### "
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" #### "
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" ### "
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" ## "
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" # "
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" "
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};
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static const int s_arrow_bitmap_width = 9;
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static const int s_arrow_bitmap_height = 9;
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ColumnsView::ColumnsView()
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{
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set_fill_with_background_color(true);
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set_background_role(ColorRole::Base);
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set_foreground_role(ColorRole::BaseText);
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m_columns.append({ {}, 0 });
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}
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ColumnsView::~ColumnsView()
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{
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}
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void ColumnsView::select_all()
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{
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Vector<Column> columns_for_selection;
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selection().for_each_index([&](auto& index) {
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for (auto& column : m_columns) {
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if (column.parent_index == index.parent()) {
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columns_for_selection.append(column);
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return;
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}
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}
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VERIFY_NOT_REACHED();
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});
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for (Column& column : columns_for_selection) {
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int row_count = model()->row_count(column.parent_index);
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for (int row = 0; row < row_count; row++) {
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ModelIndex index = model()->index(row, m_model_column, column.parent_index);
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selection().add(index);
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}
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}
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}
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void ColumnsView::paint_event(PaintEvent& event)
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{
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AbstractView::paint_event(event);
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if (!model())
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return;
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Painter painter(*this);
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painter.add_clip_rect(frame_inner_rect());
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painter.add_clip_rect(event.rect());
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painter.translate(frame_thickness(), frame_thickness());
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painter.translate(-horizontal_scrollbar().value(), -vertical_scrollbar().value());
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int column_x = 0;
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auto selection_color = is_focused() ? palette().selection() : palette().inactive_selection();
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for (size_t i = 0; i < m_columns.size(); i++) {
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auto& column = m_columns[i];
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auto* next_column = i + 1 == m_columns.size() ? nullptr : &m_columns[i + 1];
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VERIFY(column.width > 0);
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int row_count = model()->row_count(column.parent_index);
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for (int row = 0; row < row_count; row++) {
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ModelIndex index = model()->index(row, m_model_column, column.parent_index);
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VERIFY(index.is_valid());
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bool is_selected_row = selection().contains(index);
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Color background_color = palette().color(background_role());
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Color text_color = palette().color(foreground_role());
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if (next_column != nullptr && next_column->parent_index == index) {
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background_color = palette().inactive_selection();
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text_color = palette().inactive_selection_text();
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}
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if (is_selected_row) {
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background_color = selection_color;
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text_color = is_focused() ? palette().selection_text() : palette().inactive_selection_text();
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}
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Gfx::IntRect row_rect { column_x, row * item_height(), column.width, item_height() };
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painter.fill_rect(row_rect, background_color);
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auto icon = index.data(ModelRole::Icon);
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Gfx::IntRect icon_rect = { column_x + icon_spacing(), 0, icon_size(), icon_size() };
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icon_rect.center_vertically_within(row_rect);
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if (icon.is_icon()) {
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if (auto* bitmap = icon.as_icon().bitmap_for_size(icon_size())) {
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if (is_selected_row) {
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auto tint = selection_color.with_alpha(100);
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painter.blit_filtered(icon_rect.location(), *bitmap, bitmap->rect(), [&](auto src) { return src.blend(tint); });
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} else if (m_hovered_index.is_valid() && m_hovered_index.parent() == index.parent() && m_hovered_index.row() == index.row()) {
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painter.blit_brightened(icon_rect.location(), *bitmap, bitmap->rect());
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} else {
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painter.blit(icon_rect.location(), *bitmap, bitmap->rect());
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}
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}
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}
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Gfx::IntRect text_rect = {
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icon_rect.right() + 1 + icon_spacing(), row * item_height(),
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column.width - icon_spacing() - icon_size() - icon_spacing() - icon_spacing() - s_arrow_bitmap_width - icon_spacing(), item_height()
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};
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draw_item_text(painter, index, is_selected_row, text_rect, index.data().to_string(), font_for_index(index), Gfx::TextAlignment::CenterLeft, Gfx::TextElision::None);
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if (is_focused() && index == cursor_index()) {
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painter.draw_rect(row_rect, palette().color(background_role()));
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painter.draw_focus_rect(row_rect, palette().focus_outline());
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}
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if (has_pending_drop() && index == drop_candidate_index()) {
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painter.draw_rect(row_rect, palette().selection(), true);
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}
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bool expandable = model()->row_count(index) > 0;
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if (expandable) {
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Gfx::IntRect arrow_rect = {
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text_rect.right() + 1 + icon_spacing(), 0,
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s_arrow_bitmap_width, s_arrow_bitmap_height
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};
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arrow_rect.center_vertically_within(row_rect);
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static auto& arrow_bitmap = Gfx::CharacterBitmap::create_from_ascii(s_arrow_bitmap_data, s_arrow_bitmap_width, s_arrow_bitmap_height).leak_ref();
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painter.draw_bitmap(arrow_rect.location(), arrow_bitmap, text_color);
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}
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}
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int separator_height = content_size().height();
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if (height() > separator_height)
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separator_height = height();
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painter.draw_line({ column_x + column.width, 0 }, { column_x + column.width, separator_height }, palette().button());
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column_x += column.width + 1;
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}
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}
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void ColumnsView::push_column(const ModelIndex& parent_index)
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{
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VERIFY(model());
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// Drop columns at the end.
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ModelIndex grandparent = model()->parent_index(parent_index);
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for (int i = m_columns.size() - 1; i > 0; i--) {
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if (m_columns[i].parent_index == grandparent)
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break;
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m_columns.shrink(i);
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dbgln("Dropping column {}", i);
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}
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// Add the new column.
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dbgln("Adding a new column");
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m_columns.append({ parent_index, 0 });
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update_column_sizes();
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update();
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}
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void ColumnsView::update_column_sizes()
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{
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if (!model())
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return;
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int total_width = 0;
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int total_height = 0;
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for (auto& column : m_columns) {
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int row_count = model()->row_count(column.parent_index);
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int column_height = row_count * item_height();
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if (column_height > total_height)
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total_height = column_height;
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column.width = 10;
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for (int row = 0; row < row_count; row++) {
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ModelIndex index = model()->index(row, m_model_column, column.parent_index);
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VERIFY(index.is_valid());
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auto text = index.data().to_string();
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int row_width = icon_spacing() + icon_size() + icon_spacing() + font().width(text) + icon_spacing() + s_arrow_bitmap_width + icon_spacing();
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if (row_width > column.width)
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column.width = row_width;
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}
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total_width += column.width + 1;
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}
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set_content_size({ total_width, total_height });
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}
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ModelIndex ColumnsView::index_at_event_position(const Gfx::IntPoint& a_position) const
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{
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if (!model())
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return {};
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auto position = a_position.translated(horizontal_scrollbar().value() - frame_thickness(), vertical_scrollbar().value() - frame_thickness());
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int column_x = 0;
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for (auto& column : m_columns) {
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if (position.x() < column_x)
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break;
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if (position.x() > column_x + column.width) {
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column_x += column.width;
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continue;
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}
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int row = position.y() / item_height();
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int row_count = model()->row_count(column.parent_index);
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if (row >= row_count)
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return {};
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return model()->index(row, m_model_column, column.parent_index);
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}
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return {};
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}
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void ColumnsView::mousedown_event(MouseEvent& event)
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{
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AbstractView::mousedown_event(event);
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if (!model())
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return;
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if (event.button() != MouseButton::Left)
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return;
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auto index = index_at_event_position(event.position());
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if (index.is_valid() && !(event.modifiers() & Mod_Ctrl)) {
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if (model()->row_count(index))
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push_column(index);
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}
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}
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void ColumnsView::model_did_update(unsigned flags)
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{
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AbstractView::model_did_update(flags);
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// FIXME: Don't drop the columns on minor updates.
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dbgln("Model was updated; dropping columns :(");
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m_columns.clear();
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m_columns.append({ {}, 0 });
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update_column_sizes();
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update();
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}
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void ColumnsView::move_cursor(CursorMovement movement, SelectionUpdate selection_update)
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{
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if (!model())
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return;
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auto& model = *this->model();
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if (!cursor_index().is_valid()) {
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set_cursor(model.index(0, m_model_column, {}), SelectionUpdate::Set);
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return;
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}
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ModelIndex new_index;
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auto cursor_parent = model.parent_index(cursor_index());
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switch (movement) {
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case CursorMovement::Up: {
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int row = cursor_index().row() > 0 ? cursor_index().row() - 1 : 0;
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new_index = model.index(row, cursor_index().column(), cursor_parent);
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break;
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}
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case CursorMovement::Down: {
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int row = cursor_index().row() + 1;
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new_index = model.index(row, cursor_index().column(), cursor_parent);
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break;
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}
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case CursorMovement::Left:
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new_index = cursor_parent;
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break;
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case CursorMovement::Right:
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new_index = model.index(0, m_model_column, cursor_index());
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if (model.is_valid(new_index)) {
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if (model.is_valid(cursor_index()))
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push_column(cursor_index());
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update();
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break;
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}
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default:
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break;
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}
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if (new_index.is_valid())
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set_cursor(new_index, selection_update);
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}
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Gfx::IntRect ColumnsView::content_rect(const ModelIndex& index) const
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{
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if (!index.is_valid())
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return {};
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int column_x = 0;
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for (auto& column : m_columns) {
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if (column.parent_index == index.parent())
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return { column_x + icon_size(), index.row() * item_height(), column.width - icon_size(), item_height() };
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column_x += column.width + 1;
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}
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return {};
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}
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}
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