1 /* 2 * Copyright (C) 2007 Alp Toker <alp@atoker.com> 3 * Copyright (C) 2007 Apple Inc. 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Library General Public 7 * License as published by the Free Software Foundation; either 8 * version 2 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Library General Public License for more details. 14 * 15 * You should have received a copy of the GNU Library General Public License 16 * along with this library; see the file COPYING.LIB. If not, write to 17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 18 * Boston, MA 02110-1301, USA. 19 */ 20 21 #ifndef PrintContext_h 22 #define PrintContext_h 23 24 #include "wtf/Forward.h" 25 #include "wtf/HashMap.h" 26 #include "wtf/Vector.h" 27 #include "wtf/text/WTFString.h" 28 29 namespace WebCore { 30 31 class Element; 32 class LocalFrame; 33 class FloatRect; 34 class FloatSize; 35 class GraphicsContext; 36 class IntRect; 37 class Node; 38 39 class PrintContext { 40 public: 41 explicit PrintContext(LocalFrame*); 42 ~PrintContext(); 43 frame()44 LocalFrame* frame() const { return m_frame; } 45 46 // Break up a page into rects without relayout. 47 // 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. 48 // FIXME: Header and footer height should be applied before layout, not after. 49 // FIXME: The printRect argument is only used to determine page aspect ratio, it would be better to pass a FloatSize with page dimensions instead. 50 void computePageRects(const FloatRect& printRect, float headerHeight, float footerHeight, float userScaleFactor, float& outPageHeight, bool allowHorizontalTiling = false); 51 52 // Deprecated. Page size computation is already in this class, clients shouldn't be copying it. 53 void computePageRectsWithPageSize(const FloatSize& pageSizeInPixels, bool allowHorizontalTiling); 54 55 // These are only valid after page rects are computed. pageCount()56 size_t pageCount() const { return m_pageRects.size(); } pageRect(size_t pageNumber)57 const IntRect& pageRect(size_t pageNumber) const { return m_pageRects[pageNumber]; } pageRects()58 const Vector<IntRect>& pageRects() const { return m_pageRects; } 59 60 // Enter print mode, updating layout for new page size. 61 // This function can be called multiple times to apply new print options without going back to screen mode. 62 void begin(float width, float height = 0); 63 64 // FIXME: eliminate width argument. 65 void spoolPage(GraphicsContext& ctx, int pageNumber, float width); 66 67 // Return to screen mode. 68 void end(); 69 70 // Used by layout tests. 71 static int pageNumberForElement(Element*, const FloatSize& pageSizeInPixels); // Returns -1 if page isn't found. 72 static String pageProperty(LocalFrame* frame, const char* propertyName, int pageNumber); 73 static bool isPageBoxVisible(LocalFrame* frame, int pageNumber); 74 static String pageSizeAndMarginsInPixels(LocalFrame* frame, int pageNumber, int width, int height, int marginTop, int marginRight, int marginBottom, int marginLeft); 75 static int numberOfPages(LocalFrame*, const FloatSize& pageSizeInPixels); 76 // Draw all pages into a graphics context with lines which mean page boundaries. 77 // The height of the graphics context should be 78 // (pageSizeInPixels.height() + 1) * number-of-pages - 1 79 static void spoolAllPagesWithBoundaries(LocalFrame*, GraphicsContext&, const FloatSize& pageSizeInPixels); 80 81 protected: 82 void outputLinkedDestinations(GraphicsContext&, Node*, const IntRect& pageRect); 83 84 LocalFrame* m_frame; 85 Vector<IntRect> m_pageRects; 86 87 private: 88 void computePageRectsWithPageSizeInternal(const FloatSize& pageSizeInPixels, bool allowHorizontalTiling); 89 void collectLinkedDestinations(Node*); 90 91 // Used to prevent misuses of begin() and end() (e.g., call end without begin). 92 bool m_isPrinting; 93 94 HashMap<String, Element*> m_linkedDestinations; 95 bool m_linkedDestinationsValid; 96 }; 97 98 } 99 100 #endif 101