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 /*
  * This file is part of the HTML widget for KDE.
  *
  * Copyright (C) 1999-2003 Lars Knoll (knoll@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *
  * 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 render_canvas_h
 #define render_canvas_h
 
 #include "render_block.h"
 
 class KHTMLView;
 
 namespace khtml
 {
 
 class RenderPage;
 class RenderStyle;
 
 enum CanvasMode {
     CanvasViewPort, // Paints inside a viewport
     CanvasPage,     // Paints one page
     CanvasDocument  // Paints the whole document
 };
 
 class RenderCanvas : public RenderBlock
 {
 public:
     RenderCanvas(DOM::NodeImpl *node, KHTMLView *view);
     ~RenderCanvas();
 
     const char *renderName() const override
     {
         return "RenderCanvas";
     }
 
     bool isCanvas() const override
     {
         return true;
     }
 
     void setStyle(RenderStyle *style) override;
     void layout() override;
     void calcWidth() override;
     void calcHeight() override;
     void calcMinMaxWidth() override;
     bool absolutePosition(int &xPos, int &yPos, bool f = false) const override;
 
     int docHeight() const;
     int docWidth() const;
 
     KHTMLView *view() const
     {
         return m_view;
     }
 
     void repaint(Priority p = NormalPriority) override;
     void repaintRectangle(int x, int y, int w, int h, Priority p = NormalPriority, bool f = false) override;
     void repaintViewRectangle(int x, int y, int w, int h, bool asap = false);
     bool needsFullRepaint() const;
     void deferredRepaint(RenderObject *o);
     void scheduleDeferredRepaints();
 
     void paint(PaintInfo &, int tx, int ty) override;
     void paintBoxDecorations(PaintInfo &paintInfo, int _tx, int _ty) override;
     virtual void setSelection(RenderObject *s, int sp, RenderObject *e, int ep);
     virtual void clearSelection(bool doRepaint = true);
     virtual RenderObject *selectionStart() const
     {
         return m_selectionStart;
     }
     virtual RenderObject *selectionEnd() const
     {
         return m_selectionEnd;
     }
     bool hasSelection() const
     {
         return m_selectionStart && m_selectionEnd;
     }
 
     void setPrintImages(bool enable)
     {
         m_printImages = enable;
     }
     bool printImages() const
     {
         return m_printImages;
     }
 
     void setCanvasMode(CanvasMode mode)
     {
         m_canvasMode = mode;
     }
     CanvasMode canvasMode() const
     {
         return m_canvasMode;
     }
 
     void setPagedMode(bool b)
     {
         m_pagedMode = b;
     }
     void setStaticMode(bool b)
     {
         m_staticMode = b;
     }
 
     bool pagedMode() const
     {
         return m_pagedMode;
     }
     bool staticMode() const
     {
         return m_staticMode;
     }
 
     void setPageTop(int top)
     {
         m_pageTop = top;
 //         m_y = top;
     }
     void setPageBottom(int bottom)
     {
         m_pageBottom = bottom;
     }
     int pageTop() const
     {
         return m_pageTop;
     }
     int pageBottom() const
     {
         return m_pageBottom;
     }
 
     int pageTopAfter(int y) const override
     {
         if (pageHeight() == 0) {
             return 0;
         }
         return (y / pageHeight() + 1) * pageHeight();
     }
 
     int crossesPageBreak(int top, int bottom) const override
     {
         if (pageHeight() == 0) {
             return false;
         }
         int pT = top / pageHeight();
         // bottom is actually the first line not in the box
         int pB = (bottom - 1) / pageHeight();
         return (pT == pB) ? 0 : (pB + 1);
     }
 
     void setPageNumber(int number)
     {
         m_pageNr = number;
     }
     int pageNumber() const
     {
         return m_pageNr;
     }
 
     void updateInvalidatedFonts();
 public:
     void setWidth(int width) override
     {
         m_rootWidth = m_width = width;
     }
     void setHeight(int height) override
     {
         m_rootHeight = m_height = height;
     }
 
 //     void setPageHeight( int height ) { m_viewportHeight = m_pageHeight = height; }
     int pageHeight() const
     {
         return m_pageBottom - m_pageTop;
     }
 
     int viewportWidth() const
     {
         return m_viewportWidth;
     }
     int viewportHeight() const
     {
         return m_viewportHeight;
     }
 
     RenderPage *page();
 
     QRect selectionRect() const;
     QRegion staticRegion() const;
 
     void setMaximalOutlineSize(int o)
     {
         m_maximalOutlineSize = o;
     }
     int maximalOutlineSize() const
     {
         return m_maximalOutlineSize;
     }
 
     void setNeedsWidgetMasks(bool b = true);
     bool needsWidgetMasks() const
     {
         return m_needsWidgetMasks;
     }
 
     void addStaticObject(RenderObject *o, bool positioned = false);
     void removeStaticObject(RenderObject *o, bool positioned = false);
 
     void updateDocSizeAfterLayerTranslation(RenderObject *o, bool posXOffset, bool posYOffset);
 
     bool isPerformingLayout() const
     {
         return m_isPerformingLayout;
     }
 protected:
     // makes sure document, scrollbars and viewport size are accurate
     void updateDocumentSize();
 
     // internal setters for cached values of document width/height
     // Setting to -1/-1 invalidates the cache.
     void setCachedDocWidth(int w)
     {
         m_cachedDocWidth = w;
     }
     void setCachedDocHeight(int h)
     {
         m_cachedDocHeight = h;
     }
 
     void selectionStartEnd(int &spos, int &epos) override;
 
     QRect viewRect() const override;
 
     KHTMLView *m_view;
 
     RenderObject *m_selectionStart;
     RenderObject *m_selectionEnd;
     int m_selectionStartPos;
     int m_selectionEndPos;
 
     CanvasMode m_canvasMode;
 
     int m_rootWidth;
     int m_rootHeight;
 
     int m_viewportWidth;
     int m_viewportHeight;
 
     int m_cachedDocWidth;
     int m_cachedDocHeight;
 
     bool m_printImages;
     bool m_needsFullRepaint;
 
     // Canvas is not interactive
     bool m_staticMode;
     // Canvas is paged
     bool m_pagedMode;
     // Canvas contains overlaid widgets
     bool m_needsWidgetMasks;
     // Whether we are currently performing a layout
     bool m_isPerformingLayout;
 
     short m_pageNr;
 
     int m_pageTop;
     int m_pageBottom;
 
     RenderPage *m_page;
 
     int m_maximalOutlineSize; // Used to apply a fudge factor to dirty-rect checks on blocks/tables.
     QList<RenderObject *> m_dirtyChildren;
     QSet<RenderObject *>m_fixedBackground;
     QSet<RenderObject *>m_fixedPosition;
 };
 
 inline RenderCanvas *RenderObject::canvas() const
 {
     return static_cast<RenderCanvas *>(document()->renderer());
 }
 
 // Represents the page-context of CSS
 class RenderPage
 {
 public:
     RenderPage(RenderCanvas *canvas) : m_canvas(canvas),
         m_marginTop(0), m_marginBottom(0),
         m_marginLeft(0), m_marginRight(0),
         m_pageWidth(0), m_pageHeight(0),
         m_fixedSize(false)
     {
         m_style = new RenderPageStyle();
     }
     virtual ~RenderPage()
     {
         delete m_style;
     }
 
     int marginTop() const
     {
         return m_marginTop;
     }
     int marginBottom() const
     {
         return m_marginBottom;
     }
     int marginLeft() const
     {
         return m_marginLeft;
     }
     int marginRight() const
     {
         return m_marginRight;
     }
 
     void setMarginTop(int margin)
     {
         m_marginTop = margin;
     }
     void setMarginBottom(int margin)
     {
         m_marginBottom = margin;
     }
     void setMarginLeft(int margin)
     {
         m_marginLeft = margin;
     }
     void setMarginRight(int margin)
     {
         m_marginRight = margin;
     }
 
     int pageWidth() const
     {
         return m_pageWidth;
     }
     int pageHeight() const
     {
         return m_pageHeight;
     }
 
     void setPageSize(int width, int height)
     {
         m_pageWidth = width;
         m_pageHeight = height;
     }
 
     // Returns true if size was set by document, false if set by user-agent
     bool fixedSize() const
     {
         return m_fixedSize;
     }
     void setFixedSize(bool b)
     {
         m_fixedSize = b;
     }
 
     RenderPageStyle *style()
     {
         return m_style;
     }
     const RenderPageStyle *style() const
     {
         return m_style;
     }
 
 protected:
     RenderCanvas *m_canvas;
     RenderPageStyle *m_style;
 
     int m_marginTop;
     int m_marginBottom;
     int m_marginLeft;
     int m_marginRight;
 
     int m_pageWidth;
     int m_pageHeight;
 
     bool m_fixedSize;
 };
 
 }
 #endif