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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 THIRD_PARTY_BLINK_RENDERER_CORE_PAGE_PRINT_CONTEXT_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_PAGE_PRINT_CONTEXT_H_
#include "third_party/blink/public/web/web_print_page_description.h"
#include "third_party/blink/public/web/web_print_params.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_hash_map.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/wtf/forward.h"
#include "third_party/blink/renderer/platform/wtf/text/string_hash.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/size_f.h"
namespace blink {
class Element;
class GraphicsContext;
class LocalFrame;
class Node;
class PropertyTreeStateOrAlias;
class CORE_EXPORT PrintContext : public GarbageCollected<PrintContext> {
public:
explicit PrintContext(LocalFrame*);
virtual ~PrintContext();
LocalFrame* GetFrame() const { return frame_.Get(); }
// These are only valid when inside print mode.
virtual wtf_size_t PageCount() const;
gfx::Rect PageRect(wtf_size_t page_index) const;
// Enter print mode, updating layout for paginated layout. WebPrintParams
// provides a default page size and margins, but this may be overridden by
// at-page rules for any given page.
// This function can be called multiple times to apply new print options
// without going back to screen mode.
virtual void BeginPrintMode(const WebPrintParams&);
// Return to screen mode.
virtual void EndPrintMode();
// The following static methods are used by web tests:
// Returns -1 if page isn't found.
static int PageNumberForElement(Element*,
const gfx::SizeF& page_size_in_pixels);
static int NumberOfPages(LocalFrame*, const gfx::SizeF& page_size_in_pixels);
virtual void Trace(Visitor*) const;
protected:
friend class PrintContextTest;
void OutputLinkedDestinations(GraphicsContext&,
const PropertyTreeStateOrAlias&,
const gfx::Rect& page_rect);
bool IsFrameValid() const;
Member<LocalFrame> frame_;
bool use_paginated_layout_ = true;
private:
void ComputePageCount();
void CollectLinkedDestinations(Node*);
// Used to prevent misuses of BeginPrintMode() and EndPrintMode() (e.g., call
// EndPrintMode() without BeginPrintMode()).
bool is_printing_;
HeapHashMap<String, Member<Node>> linked_destinations_;
bool linked_destinations_valid_;
};
class CORE_EXPORT ScopedPrintContext {
STACK_ALLOCATED();
public:
explicit ScopedPrintContext(LocalFrame*);
ScopedPrintContext(const ScopedPrintContext&) = delete;
ScopedPrintContext& operator=(const ScopedPrintContext&) = delete;
~ScopedPrintContext();
PrintContext* operator->() const { return context_; }
private:
PrintContext* context_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_PAGE_PRINT_CONTEXT_H_
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