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/*
* 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 "wtf/Forward.h"
#include "wtf/HashMap.h"
#include "wtf/Vector.h"
#include "wtf/text/WTFString.h"
namespace blink {
class Element;
class LocalFrame;
class FloatRect;
class FloatSize;
class GraphicsContext;
class IntRect;
class Node;
class CORE_EXPORT PrintContext
: public GarbageCollectedFinalized<PrintContext> {
public:
explicit PrintContext(LocalFrame*);
virtual ~PrintContext();
LocalFrame* frame() const { return m_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& printRect,
float headerHeight,
float footerHeight,
float userScaleFactor,
float& outPageHeight);
// Deprecated. Page size computation is already in this class, clients
// shouldn't be copying it.
// FIXME: Everyone passes |false| for the second paramer. We should remove the
// second parameter.
virtual void computePageRectsWithPageSize(const FloatSize& pageSizeInPixels);
// These are only valid after page rects are computed.
size_t pageCount() const { return m_pageRects.size(); }
const IntRect& pageRect(size_t pageNumber) const {
return m_pageRects[pageNumber];
}
const Vector<IntRect>& pageRects() const { return m_pageRects; }
// 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& pageSizeInPixels); // Returns -1 if page isn't found.
static String pageProperty(LocalFrame*,
const char* propertyName,
int pageNumber);
static bool isPageBoxVisible(LocalFrame*, int pageNumber);
static String pageSizeAndMarginsInPixels(LocalFrame*,
int pageNumber,
int width,
int height,
int marginTop,
int marginRight,
int marginBottom,
int marginLeft);
static int numberOfPages(LocalFrame*, const FloatSize& pageSizeInPixels);
DECLARE_VIRTUAL_TRACE();
protected:
void outputLinkedDestinations(GraphicsContext&, const IntRect& pageRect);
Member<LocalFrame> m_frame;
Vector<IntRect> m_pageRects;
private:
void computePageRectsWithPageSizeInternal(const FloatSize& pageSizeInPixels);
void collectLinkedDestinations(Node*);
// Used to prevent misuses of begin() and end() (e.g., call end without
// begin).
bool m_isPrinting;
HeapHashMap<String, Member<Element>> m_linkedDestinations;
bool m_linkedDestinationsValid;
};
} // namespace blink
#endif
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