| /* |
| * Copyright (C) 2007 Alp Toker <alp@atoker.com> |
| * Copyright (C) 2007 Apple Inc. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifndef PrintContext_h |
| #define PrintContext_h |
| |
| #include "core/CoreExport.h" |
| #include "platform/heap/Handle.h" |
| #include "platform/wtf/Forward.h" |
| #include "platform/wtf/HashMap.h" |
| #include "platform/wtf/Vector.h" |
| #include "platform/wtf/text/WTFString.h" |
| |
| namespace blink { |
| |
| class Element; |
| class FloatRect; |
| class FloatSize; |
| class GraphicsContext; |
| class IntRect; |
| class LocalFrame; |
| class Node; |
| |
| class CORE_EXPORT PrintContext |
| : public GarbageCollectedFinalized<PrintContext> { |
| public: |
| explicit PrintContext(LocalFrame*); |
| virtual ~PrintContext(); |
| |
| LocalFrame* GetFrame() const { return frame_; } |
| |
| // Break up a page into rects without relayout. |
| // FIXME: This means that CSS page breaks won't be on page boundary if the |
| // size is different than what was passed to begin(). That's probably not |
| // always desirable. |
| // FIXME: Header and footer height should be applied before layout, not after. |
| // FIXME: The printRect argument is only used to determine page aspect ratio, |
| // it would be better to pass a FloatSize with page dimensions instead. |
| virtual void ComputePageRects(const FloatRect& print_rect, |
| float header_height, |
| float footer_height, |
| float user_scale_factor, |
| float& out_page_height); |
| |
| // Deprecated. Page size computation is already in this class, clients |
| // shouldn't be copying it. |
| virtual void ComputePageRectsWithPageSize( |
| const FloatSize& page_size_in_pixels); |
| |
| // These are only valid after page rects are computed. |
| size_t PageCount() const { return page_rects_.size(); } |
| const IntRect& PageRect(size_t page_number) const { |
| return page_rects_[page_number]; |
| } |
| const Vector<IntRect>& PageRects() const { return page_rects_; } |
| |
| // Enter print mode, updating layout for new page size. |
| // This function can be called multiple times to apply new print options |
| // without going back to screen mode. |
| virtual void begin(float width, float height = 0); |
| |
| // Return to screen mode. |
| virtual void end(); |
| |
| // Used by layout tests. |
| static int PageNumberForElement( |
| Element*, |
| const FloatSize& page_size_in_pixels); // Returns -1 if page isn't found. |
| static String PageProperty(LocalFrame*, |
| const char* property_name, |
| int page_number); |
| static bool IsPageBoxVisible(LocalFrame*, int page_number); |
| static String PageSizeAndMarginsInPixels(LocalFrame*, |
| int page_number, |
| int width, |
| int height, |
| int margin_top, |
| int margin_right, |
| int margin_bottom, |
| int margin_left); |
| static int NumberOfPages(LocalFrame*, const FloatSize& page_size_in_pixels); |
| |
| DECLARE_VIRTUAL_TRACE(); |
| |
| protected: |
| friend class PrintContextTest; |
| |
| void OutputLinkedDestinations(GraphicsContext&, const IntRect& page_rect); |
| |
| Member<LocalFrame> frame_; |
| Vector<IntRect> page_rects_; |
| |
| private: |
| void ComputePageRectsWithPageSizeInternal( |
| const FloatSize& page_size_in_pixels); |
| void CollectLinkedDestinations(Node*); |
| bool IsFrameValid() const; |
| |
| // Used to prevent misuses of begin() and end() (e.g., call end without |
| // begin). |
| bool is_printing_; |
| |
| HeapHashMap<String, Member<Element>> linked_destinations_; |
| bool linked_destinations_valid_; |
| }; |
| |
| class ScopedPrintContext { |
| STACK_ALLOCATED(); |
| |
| public: |
| explicit ScopedPrintContext(LocalFrame*); |
| ~ScopedPrintContext(); |
| |
| PrintContext* operator->() const { return context_.Get(); } |
| |
| private: |
| Member<PrintContext> context_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ScopedPrintContext); |
| }; |
| |
| } // namespace blink |
| |
| #endif |