2 * Copyright (C) 2007 Alp Toker <alp@atoker.com>
3 * Copyright (C) 2007 Apple Inc.
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.
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.
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.
21 #ifndef PrintContext_h
22 #define PrintContext_h
24 #include "platform/heap/Handle.h"
25 #include "wtf/Forward.h"
26 #include "wtf/HashMap.h"
27 #include "wtf/Vector.h"
28 #include "wtf/text/WTFString.h"
36 class GraphicsContext;
40 class PrintContext : public NoBaseWillBeGarbageCollectedFinalized<PrintContext> {
42 explicit PrintContext(LocalFrame*);
43 virtual ~PrintContext();
45 LocalFrame* frame() const { return m_frame; }
47 // Break up a page into rects without relayout.
48 // 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.
49 // FIXME: Header and footer height should be applied before layout, not after.
50 // FIXME: The printRect argument is only used to determine page aspect ratio, it would be better to pass a FloatSize with page dimensions instead.
51 virtual void computePageRects(const FloatRect& printRect, float headerHeight, float footerHeight, float userScaleFactor, float& outPageHeight);
53 // Deprecated. Page size computation is already in this class, clients shouldn't be copying it.
54 // FIXME: Everyone passes |false| for the second paramer. We should remove the second parameter.
55 virtual void computePageRectsWithPageSize(const FloatSize& pageSizeInPixels, bool allowHorizontalTiling);
57 // These are only valid after page rects are computed.
58 size_t pageCount() const { return m_pageRects.size(); }
59 const IntRect& pageRect(size_t pageNumber) const { return m_pageRects[pageNumber]; }
60 const Vector<IntRect>& pageRects() const { return m_pageRects; }
62 // Enter print mode, updating layout for new page size.
63 // This function can be called multiple times to apply new print options without going back to screen mode.
64 virtual void begin(float width, float height = 0);
66 // Return to screen mode.
69 // Used by layout tests.
70 static int pageNumberForElement(Element*, const FloatSize& pageSizeInPixels); // Returns -1 if page isn't found.
71 static String pageProperty(LocalFrame* frame, const char* propertyName, int pageNumber);
72 static bool isPageBoxVisible(LocalFrame* frame, int pageNumber);
73 static String pageSizeAndMarginsInPixels(LocalFrame* frame, int pageNumber, int width, int height, int marginTop, int marginRight, int marginBottom, int marginLeft);
74 static int numberOfPages(LocalFrame*, const FloatSize& pageSizeInPixels);
76 virtual void trace(Visitor*);
79 void outputLinkedDestinations(GraphicsContext&, Node*, const IntRect& pageRect);
82 Vector<IntRect> m_pageRects;
85 void computePageRectsWithPageSizeInternal(const FloatSize& pageSizeInPixels, bool allowHorizontalTiling);
86 void collectLinkedDestinations(Node*);
88 // Used to prevent misuses of begin() and end() (e.g., call end without begin).
91 WillBeHeapHashMap<String, RawPtrWillBeMember<Element> > m_linkedDestinations;
92 bool m_linkedDestinationsValid;