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PDFViewer: Support a continuous page view mode
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5 changed files with 196 additions and 49 deletions
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@ -14,6 +14,26 @@
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static constexpr size_t initial_zoom_level = 8;
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struct PageDimensionCache {
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// Fixed for a given document
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struct PageInfo {
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Gfx::FloatSize size;
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int rotation;
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};
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// Based on PageInfo, also depends on some dynamic factors like
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// zoom level and app size
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struct RenderInfo {
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Gfx::FloatSize size;
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float total_height_before_this_page;
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};
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Vector<PageInfo> page_info;
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Vector<RenderInfo> render_info;
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float max_width;
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float total_height;
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};
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class PDFViewer : public GUI::AbstractScrollableWidget {
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C_OBJECT(PDFViewer)
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@ -29,7 +49,7 @@ public:
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ALWAYS_INLINE void set_current_page(u32 current_page) { m_current_page_index = current_page; }
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ALWAYS_INLINE RefPtr<PDF::Document> const& document() const { return m_document; }
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void set_document(RefPtr<PDF::Document>);
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PDF::PDFErrorOr<void> set_document(RefPtr<PDF::Document>);
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Function<void(u32 new_page)> on_page_change;
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@ -59,13 +79,16 @@ private:
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};
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PDF::PDFErrorOr<NonnullRefPtr<Gfx::Bitmap>> get_rendered_page(u32 index);
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PDF::PDFErrorOr<NonnullRefPtr<Gfx::Bitmap>> render_page(const PDF::Page&);
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PDF::PDFErrorOr<NonnullRefPtr<Gfx::Bitmap>> render_page(u32 page_index);
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PDF::PDFErrorOr<void> cache_page_dimensions(bool recalculate_fixed_info = false);
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void change_page(u32 new_page);
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RefPtr<PDF::Document> m_document;
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u32 m_current_page_index { 0 };
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Vector<HashMap<u32, RenderedPage>> m_rendered_page_list;
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u8 m_zoom_level { initial_zoom_level };
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PageDimensionCache m_page_dimension_cache;
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PageViewMode m_page_view_mode;
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Gfx::IntPoint m_pan_starting_position;
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