mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-22 23:50:19 +00:00
96 lines
2.7 KiB
C++
96 lines
2.7 KiB
C++
/*
|
|
* Copyright (c) 2021-2022, Matthew Olsson <mattco@serenityos.org>
|
|
* Copyright (c) 2022, the SerenityOS developers.
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/HashMap.h>
|
|
#include <LibGUI/AbstractScrollableWidget.h>
|
|
#include <LibGfx/Bitmap.h>
|
|
#include <LibPDF/Document.h>
|
|
|
|
static constexpr size_t initial_zoom_level = 8;
|
|
|
|
struct PageDimensionCache {
|
|
// Fixed for a given document
|
|
struct PageInfo {
|
|
Gfx::FloatSize size;
|
|
int rotation;
|
|
};
|
|
|
|
// Based on PageInfo, also depends on some dynamic factors like
|
|
// zoom level and app size
|
|
struct RenderInfo {
|
|
Gfx::FloatSize size;
|
|
float total_height_before_this_page;
|
|
};
|
|
|
|
Vector<PageInfo> page_info;
|
|
Vector<RenderInfo> render_info;
|
|
float max_width;
|
|
float total_height;
|
|
};
|
|
|
|
class PDFViewer : public GUI::AbstractScrollableWidget {
|
|
C_OBJECT(PDFViewer)
|
|
|
|
public:
|
|
enum class PageViewMode {
|
|
Single,
|
|
Multiple,
|
|
};
|
|
|
|
virtual ~PDFViewer() override = default;
|
|
|
|
ALWAYS_INLINE u32 current_page() const { return m_current_page_index; }
|
|
void set_current_page(u32 current_page);
|
|
|
|
ALWAYS_INLINE RefPtr<PDF::Document> const& document() const { return m_document; }
|
|
PDF::PDFErrorOr<void> set_document(RefPtr<PDF::Document>);
|
|
|
|
Function<void(u32 new_page)> on_page_change;
|
|
|
|
void zoom_in();
|
|
void zoom_out();
|
|
void reset_zoom();
|
|
void rotate(int degrees);
|
|
|
|
PageViewMode page_view_mode() const { return m_page_view_mode; }
|
|
void set_page_view_mode(PageViewMode);
|
|
|
|
protected:
|
|
PDFViewer();
|
|
|
|
virtual void paint_event(GUI::PaintEvent&) override;
|
|
virtual void resize_event(GUI::ResizeEvent&) override;
|
|
virtual void mousewheel_event(GUI::MouseEvent&) override;
|
|
virtual void mousedown_event(GUI::MouseEvent&) override;
|
|
virtual void mouseup_event(GUI::MouseEvent&) override;
|
|
virtual void mousemove_event(GUI::MouseEvent&) override;
|
|
virtual void timer_event(Core::TimerEvent&) override;
|
|
|
|
private:
|
|
struct RenderedPage {
|
|
NonnullRefPtr<Gfx::Bitmap> bitmap;
|
|
int rotation;
|
|
};
|
|
|
|
PDF::PDFErrorOr<NonnullRefPtr<Gfx::Bitmap>> get_rendered_page(u32 index);
|
|
PDF::PDFErrorOr<NonnullRefPtr<Gfx::Bitmap>> render_page(u32 page_index);
|
|
PDF::PDFErrorOr<void> cache_page_dimensions(bool recalculate_fixed_info = false);
|
|
void change_page(u32 new_page);
|
|
|
|
RefPtr<PDF::Document> m_document;
|
|
u32 m_current_page_index { 0 };
|
|
Vector<HashMap<u32, RenderedPage>> m_rendered_page_list;
|
|
|
|
u8 m_zoom_level { initial_zoom_level };
|
|
PageDimensionCache m_page_dimension_cache;
|
|
PageViewMode m_page_view_mode;
|
|
|
|
Gfx::IntPoint m_pan_starting_position;
|
|
int m_rotations { 0 };
|
|
};
|