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Ladybird: Basic scrolling support

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This commit is contained in:
Andreas Kling 2022-07-03 20:44:58 +02:00 • committed by Andrew Kaster
parent 1eb653115b
commit 80526625e8
3 changed files with 27 additions and 3 deletions
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18
Ladybird/WebView.cpp
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@ -1,5 +1,6 @@
/*
* Copyright (c) 2022, Dex♪ <dexes.ttp@gmail.com>
* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -49,6 +50,7 @@
#include <LibWebSocket/WebSocket.h>
#include <QPaintEvent>
#include <QPainter>
#include <QScrollBar>
class HeadlessBrowserPageClient final : public Web::PageClient {
public:
@ -198,6 +200,16 @@ public:
virtual void page_did_layout() override
{
auto* layout_root = this->layout_root();
VERIFY(layout_root);
Gfx::IntSize content_size;
if (layout_root->paint_box()->has_overflow())
content_size = enclosing_int_rect(layout_root->paint_box()->scrollable_overflow_rect().value()).size();
else
content_size = enclosing_int_rect(layout_root->paint_box()->absolute_rect()).size();
m_view.verticalScrollBar()->setMaximum(content_size.height() - m_viewport_rect.height());
m_view.horizontalScrollBar()->setMaximum(content_size.width() - m_viewport_rect.width());
}
virtual void page_did_request_scroll_into_view(Gfx::IntRect const&) override
@ -273,10 +285,10 @@ void WebView::paintEvent(QPaintEvent* event)
painter.setClipRect(event->rect());
auto output_rect = m_page_client->viewport_rect();
output_rect.set_x(horizontalScrollBar()->value());
output_rect.set_y(verticalScrollBar()->value());
auto output_bitmap = MUST(Gfx::Bitmap::try_create(Gfx::BitmapFormat::BGRx8888, output_rect.size()));
dbgln("paintEvent: {}", output_rect);
m_page_client->paint(output_rect, output_bitmap);
QImage q_image(output_bitmap->scanline_u8(0), output_bitmap->width(), output_bitmap->height(), QImage::Format_RGB32);
@ -285,7 +297,7 @@ void WebView::paintEvent(QPaintEvent* event)
void WebView::resizeEvent(QResizeEvent* event)
{
Gfx::IntRect rect(0, 0, event->size().width(), event->size().height());
Gfx::IntRect rect(horizontalScrollBar()->value(), verticalScrollBar()->value(), event->size().width(), event->size().height());
m_page_client->set_viewport_rect(rect);
}