1 /* 2 * Copyright (C) 2007 Alp Toker <alp (at) 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/Vector.h> 26 27 namespace WebCore { 28 29 class Element; 30 class Frame; 31 class FloatRect; 32 class FloatSize; 33 class GraphicsContext; 34 class IntRect; 35 36 class PrintContext { 37 public: 38 PrintContext(Frame*); 39 ~PrintContext(); 40 41 Frame* frame() const { return m_frame; } 42 43 // Break up a page into rects without relayout. 44 // 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. 45 // FIXME: Header and footer height should be applied before layout, not after. 46 // FIXME: The printRect argument is only used to determine page aspect ratio, it would be better to pass a FloatSize with page dimensions instead. 47 void computePageRects(const FloatRect& printRect, float headerHeight, float footerHeight, float userScaleFactor, float& outPageHeight, bool allowHorizontalTiling = false); 48 49 // Deprecated. Page size computation is already in this class, clients shouldn't be copying it. 50 void computePageRectsWithPageSize(const FloatSize& pageSizeInPixels, bool allowHorizontalTiling); 51 52 // These are only valid after page rects are computed. 53 size_t pageCount() const { return m_pageRects.size(); } 54 const IntRect& pageRect(size_t pageNumber) const { return m_pageRects[pageNumber]; } 55 const Vector<IntRect>& pageRects() const { return m_pageRects; } 56 57 float computeAutomaticScaleFactor(const FloatSize& availablePaperSize); 58 59 // Enter print mode, updating layout for new page size. 60 // This function can be called multiple times to apply new print options without going back to screen mode. 61 void begin(float width, float height = 0); 62 63 // FIXME: eliminate width argument. 64 void spoolPage(GraphicsContext& ctx, int pageNumber, float width); 65 66 void spoolRect(GraphicsContext& ctx, const IntRect&); 67 68 // Return to screen mode. 69 void end(); 70 71 // Used by layout tests. 72 static int pageNumberForElement(Element*, const FloatSize& pageSizeInPixels); // Returns -1 if page isn't found. 73 static String pageProperty(Frame* frame, const char* propertyName, int pageNumber); 74 static bool isPageBoxVisible(Frame* frame, int pageNumber); 75 static String pageSizeAndMarginsInPixels(Frame* frame, int pageNumber, int width, int height, int marginTop, int marginRight, int marginBottom, int marginLeft); 76 static int numberOfPages(Frame*, const FloatSize& pageSizeInPixels); 77 // Draw all pages into a graphics context with lines which mean page boundaries. 78 // The height of the graphics context should be 79 // (pageSizeInPixels.height() + 1) * number-of-pages - 1 80 static void spoolAllPagesWithBoundaries(Frame*, GraphicsContext&, const FloatSize& pageSizeInPixels); 81 82 protected: 83 Frame* m_frame; 84 Vector<IntRect> m_pageRects; 85 86 private: 87 void computePageRectsWithPageSizeInternal(const FloatSize& pageSizeInPixels, bool allowHorizontalTiling); 88 89 // Used to prevent misuses of begin() and end() (e.g., call end without begin). 90 bool m_isPrinting; 91 }; 92 93 } 94 95 #endif 96
