mirror of
https://github.com/RGBCube/serenity
synced 2025-05-15 22:54:57 +00:00
656b01eb0f
The box tree and line boxes now all store a relative offset from their containing block, instead of an absolute (document-relative) position. This removes a huge pain point from the layout system which was having to adjust offsets recursively when something moved. It also makes some layout logic significantly simpler. Every box can still find its absolute position by walking its chain of containing blocks and accumulating the translation from the root. This is currently what we do both for rendering and hit testing.
367 lines
11 KiB
C++
367 lines
11 KiB
C++
/*
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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/LexicalPath.h>
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#include <AK/URL.h>
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#include <LibCore/File.h>
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#include <LibCore/MimeData.h>
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#include <LibGUI/Application.h>
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#include <LibGUI/Painter.h>
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#include <LibGUI/ScrollBar.h>
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#include <LibGUI/Window.h>
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#include <LibGfx/ImageDecoder.h>
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#include <LibJS/Runtime/Value.h>
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#include <LibWeb/DOM/Element.h>
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#include <LibWeb/DOM/ElementFactory.h>
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#include <LibWeb/DOM/HTMLAnchorElement.h>
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#include <LibWeb/DOM/HTMLImageElement.h>
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#include <LibWeb/DOM/MouseEvent.h>
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#include <LibWeb/DOM/Text.h>
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#include <LibWeb/Dump.h>
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#include <LibWeb/Frame/EventHandler.h>
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#include <LibWeb/Frame/Frame.h>
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#include <LibWeb/Layout/LayoutDocument.h>
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#include <LibWeb/Layout/LayoutNode.h>
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#include <LibWeb/Loader/ResourceLoader.h>
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#include <LibWeb/PageView.h>
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#include <LibWeb/RenderingContext.h>
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#include <stdio.h>
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//#define SELECTION_DEBUG
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namespace Web {
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PageView::PageView()
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: m_page(make<Page>(*this))
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{
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set_should_hide_unnecessary_scrollbars(true);
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set_background_role(ColorRole::Base);
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}
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PageView::~PageView()
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{
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}
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void PageView::page_did_change_title(const String& title)
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{
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if (on_title_change)
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on_title_change(title);
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}
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void PageView::page_did_set_document_in_main_frame(Document* document)
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{
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if (on_set_document)
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on_set_document(document);
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layout_and_sync_size();
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scroll_to_top();
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update();
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}
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void PageView::page_did_start_loading(const URL& url)
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{
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if (on_load_start)
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on_load_start(url);
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}
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void PageView::page_did_change_selection()
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{
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update();
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}
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void PageView::page_did_request_cursor_change(GUI::StandardCursor cursor)
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{
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if (window())
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window()->set_override_cursor(cursor);
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}
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void PageView::page_did_request_link_context_menu(const Gfx::Point& content_position, const String& href, [[maybe_unused]] const String& target, [[maybe_unused]] unsigned modifiers)
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{
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if (on_link_context_menu_request)
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on_link_context_menu_request(href, screen_relative_rect().location().translated(to_widget_position(content_position)));
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}
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void PageView::page_did_click_link(const String& href, const String& target, unsigned modifiers)
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{
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if (on_link_click)
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on_link_click(href, target, modifiers);
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}
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void PageView::page_did_middle_click_link(const String& href, [[maybe_unused]] const String& target, [[maybe_unused]] unsigned modifiers)
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{
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if (on_link_middle_click)
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on_link_middle_click(href);
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}
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void PageView::page_did_enter_tooltip_area(const Gfx::Point& content_position, const String& title)
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{
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GUI::Application::the().show_tooltip(title, screen_relative_rect().location().translated(to_widget_position(content_position)));
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}
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void PageView::page_did_leave_tooltip_area()
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{
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GUI::Application::the().hide_tooltip();
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}
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void PageView::page_did_hover_link(const URL& url)
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{
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if (on_link_hover)
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on_link_hover(url.to_string());
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}
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void PageView::page_did_unhover_link()
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{
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}
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void PageView::page_did_request_scroll_to_anchor(const String& fragment)
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{
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scroll_to_anchor(fragment);
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}
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void PageView::page_did_invalidate(const Gfx::Rect&)
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{
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update();
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}
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void PageView::page_did_change_favicon(const Gfx::Bitmap& bitmap)
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{
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if (on_favicon_change)
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on_favicon_change(bitmap);
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}
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void PageView::layout_and_sync_size()
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{
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if (!document())
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return;
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bool had_vertical_scrollbar = vertical_scrollbar().is_visible();
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bool had_horizontal_scrollbar = horizontal_scrollbar().is_visible();
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page().main_frame().set_size(available_size());
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document()->layout();
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set_content_size(layout_root()->size().to_int_size());
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// NOTE: If layout caused us to gain or lose scrollbars, we have to lay out again
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// since the scrollbars now take up some of the available space.
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if (had_vertical_scrollbar != vertical_scrollbar().is_visible() || had_horizontal_scrollbar != horizontal_scrollbar().is_visible()) {
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page().main_frame().set_size(available_size());
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document()->layout();
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set_content_size(layout_root()->size().to_int_size());
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}
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page().main_frame().set_viewport_rect(viewport_rect_in_content_coordinates());
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#ifdef HTML_DEBUG
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dbgprintf("\033[33;1mLayout tree after layout:\033[0m\n");
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::dump_tree(*layout_root());
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#endif
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}
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void PageView::resize_event(GUI::ResizeEvent& event)
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{
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GUI::ScrollableWidget::resize_event(event);
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layout_and_sync_size();
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}
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void PageView::paint_event(GUI::PaintEvent& event)
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{
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GUI::Frame::paint_event(event);
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GUI::Painter painter(*this);
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painter.add_clip_rect(widget_inner_rect());
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painter.add_clip_rect(event.rect());
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if (!layout_root()) {
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painter.fill_rect(event.rect(), palette().color(background_role()));
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return;
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}
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painter.fill_rect(event.rect(), document()->background_color(palette()));
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if (auto background_bitmap = document()->background_image()) {
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painter.draw_tiled_bitmap(event.rect(), *background_bitmap);
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}
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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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RenderingContext context(painter, palette());
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context.set_should_show_line_box_borders(m_should_show_line_box_borders);
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context.set_viewport_rect(viewport_rect_in_content_coordinates());
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layout_root()->render(context);
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}
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void PageView::mousemove_event(GUI::MouseEvent& event)
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{
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page().handle_mousemove(to_content_position(event.position()), event.buttons(), event.modifiers());
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GUI::ScrollableWidget::mousemove_event(event);
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}
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void PageView::mousedown_event(GUI::MouseEvent& event)
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{
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page().handle_mousedown(to_content_position(event.position()), event.button(), event.modifiers());
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GUI::ScrollableWidget::mousedown_event(event);
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}
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void PageView::mouseup_event(GUI::MouseEvent& event)
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{
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page().handle_mouseup(to_content_position(event.position()), event.button(), event.modifiers());
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GUI::ScrollableWidget::mouseup_event(event);
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}
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void PageView::keydown_event(GUI::KeyEvent& event)
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{
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if (event.modifiers() == 0) {
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switch (event.key()) {
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case Key_Home:
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vertical_scrollbar().set_value(0);
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break;
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case Key_End:
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vertical_scrollbar().set_value(vertical_scrollbar().max());
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break;
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case Key_Down:
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vertical_scrollbar().set_value(vertical_scrollbar().value() + vertical_scrollbar().step());
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break;
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case Key_Up:
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vertical_scrollbar().set_value(vertical_scrollbar().value() - vertical_scrollbar().step());
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break;
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case Key_Left:
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horizontal_scrollbar().set_value(horizontal_scrollbar().value() + horizontal_scrollbar().step());
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break;
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case Key_Right:
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horizontal_scrollbar().set_value(horizontal_scrollbar().value() - horizontal_scrollbar().step());
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break;
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case Key_PageDown:
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vertical_scrollbar().set_value(vertical_scrollbar().value() + frame_inner_rect().height());
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break;
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case Key_PageUp:
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vertical_scrollbar().set_value(vertical_scrollbar().value() - frame_inner_rect().height());
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break;
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default:
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break;
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}
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}
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event.accept();
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}
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void PageView::reload()
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{
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load(page().main_frame().document()->url());
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}
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bool PageView::load(const URL& url)
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{
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if (window())
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window()->set_override_cursor(GUI::StandardCursor::None);
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return page().main_frame().loader().load(url);
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}
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const LayoutDocument* PageView::layout_root() const
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{
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return document() ? document()->layout_node() : nullptr;
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}
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LayoutDocument* PageView::layout_root()
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{
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if (!document())
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return nullptr;
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return const_cast<LayoutDocument*>(document()->layout_node());
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}
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void PageView::scroll_to_anchor(const StringView& name)
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{
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if (!document())
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return;
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const auto* element = document()->get_element_by_id(name);
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if (!element) {
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auto candidates = document()->get_elements_by_name(name);
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for (auto* candidate : candidates) {
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if (is<HTMLAnchorElement>(*candidate)) {
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element = to<HTMLAnchorElement>(candidate);
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break;
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}
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}
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}
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if (!element) {
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dbg() << "PageView::scroll_to_anchor(): Anchor not found: '" << name << "'";
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return;
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}
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if (!element->layout_node()) {
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dbg() << "PageView::scroll_to_anchor(): Anchor found but without layout node: '" << name << "'";
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return;
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}
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auto& layout_node = *element->layout_node();
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Gfx::FloatRect float_rect { layout_node.box_type_agnostic_position(), { (float)visible_content_rect().width(), (float)visible_content_rect().height() } };
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scroll_into_view(enclosing_int_rect(float_rect), true, true);
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window()->set_override_cursor(GUI::StandardCursor::None);
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}
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void PageView::set_use_old_parser(bool use_old_parser)
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{
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page().main_frame().loader().set_use_old_parser(use_old_parser);
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}
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void PageView::load_empty_document()
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{
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page().main_frame().set_document(nullptr);
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}
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Document* PageView::document()
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{
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return page().main_frame().document();
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}
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const Document* PageView::document() const
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{
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return page().main_frame().document();
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}
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void PageView::set_document(Document* document)
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{
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page().main_frame().set_document(document);
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}
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void PageView::did_scroll()
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{
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page().main_frame().set_viewport_rect(viewport_rect_in_content_coordinates());
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page().main_frame().did_scroll({});
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}
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void PageView::drop_event(GUI::DropEvent& event)
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{
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if (event.mime_data().has_urls()) {
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if (on_url_drop) {
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on_url_drop(event.mime_data().urls().first());
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return;
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}
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}
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ScrollableWidget::drop_event(event);
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}
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}
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