1 files changed, 40 insertions, 21 deletions

diff --git a/Source/WebCore/page/PrintContext.h b/Source/WebCore/page/PrintContext.h
index 2efd05d3f..ceaa23c5d 100644
--- a/Source/WebCore/page/PrintContext.h
+++ b/Source/WebCore/page/PrintContext.h
@@ -18,25 +18,28 @@
  * Boston, MA 02110-1301, USA.
  */
 
-#ifndef PrintContext_h
-#define PrintContext_h
+#pragma once
 
 #include <wtf/Forward.h>
+#include <wtf/HashMap.h>
 #include <wtf/Vector.h>
+#include <wtf/text/WTFString.h>
 
 namespace WebCore {
 
+class Document;
 class Element;
 class Frame;
 class FloatRect;
 class FloatSize;
 class GraphicsContext;
 class IntRect;
+class Node;
 
 class PrintContext {
 public:
-    explicit PrintContext(Frame*);
-    ~PrintContext();
+    WEBCORE_EXPORT explicit PrintContext(Frame*);
+    WEBCORE_EXPORT ~PrintContext();
 
     Frame* frame() const { return m_frame; }
 
@@ -44,40 +47,53 @@ public:
     // 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.
-    void computePageRects(const FloatRect& printRect, float headerHeight, float footerHeight, float userScaleFactor, float& outPageHeight, bool allowHorizontalTiling = false);
+    WEBCORE_EXPORT void computePageRects(const FloatRect& printRect, float headerHeight, float footerHeight, float userScaleFactor, float& outPageHeight, bool allowHorizontalTiling = false);
 
     // Deprecated. Page size computation is already in this class, clients shouldn't be copying it.
-    void computePageRectsWithPageSize(const FloatSize& pageSizeInPixels, bool allowHorizontalTiling);
+    WEBCORE_EXPORT void computePageRectsWithPageSize(const FloatSize& pageSizeInPixels, bool allowHorizontalTiling);
 
     // 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; }
 
-    float computeAutomaticScaleFactor(const FloatSize& availablePaperSize);
+    WEBCORE_EXPORT float computeAutomaticScaleFactor(const FloatSize& availablePaperSize);
 
     // 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.
-    void begin(float width, float height = 0);
+    WEBCORE_EXPORT void begin(float width, float height = 0);
 
     // FIXME: eliminate width argument.
-    void spoolPage(GraphicsContext& ctx, int pageNumber, float width);
+    WEBCORE_EXPORT void spoolPage(GraphicsContext& ctx, int pageNumber, float width);
 
-    void spoolRect(GraphicsContext& ctx, const IntRect&);
+    WEBCORE_EXPORT void spoolRect(GraphicsContext& ctx, const IntRect&);
 
     // Return to screen mode.
-    void end();
+    WEBCORE_EXPORT void end();
 
     // Used by layout tests.
-    static int pageNumberForElement(Element*, const FloatSize& pageSizeInPixels); // Returns -1 if page isn't found.
-    static String pageProperty(Frame* frame, const char* propertyName, int pageNumber);
-    static bool isPageBoxVisible(Frame* frame, int pageNumber);
-    static String pageSizeAndMarginsInPixels(Frame* frame, int pageNumber, int width, int height, int marginTop, int marginRight, int marginBottom, int marginLeft);
-    static int numberOfPages(Frame*, const FloatSize& pageSizeInPixels);
+    WEBCORE_EXPORT static int pageNumberForElement(Element*, const FloatSize& pageSizeInPixels); // Returns -1 if page isn't found.
+    WEBCORE_EXPORT static String pageProperty(Frame*, const char* propertyName, int pageNumber);
+    WEBCORE_EXPORT static bool isPageBoxVisible(Frame*, int pageNumber);
+    WEBCORE_EXPORT static String pageSizeAndMarginsInPixels(Frame*, int pageNumber, int width, int height, int marginTop, int marginRight, int marginBottom, int marginLeft);
+    WEBCORE_EXPORT static int numberOfPages(Frame&, const FloatSize& pageSizeInPixels);
     // Draw all pages into a graphics context with lines which mean page boundaries.
     // The height of the graphics context should be
     // (pageSizeInPixels.height() + 1) * number-of-pages - 1
-    static void spoolAllPagesWithBoundaries(Frame*, GraphicsContext&, const FloatSize& pageSizeInPixels);
+    WEBCORE_EXPORT static void spoolAllPagesWithBoundaries(Frame&, GraphicsContext&, const FloatSize& pageSizeInPixels);
+    
+    // By imaging to a width a little wider than the available pixels,
+    // thin pages will be scaled down a little, matching the way they
+    // print in IE and Camino. This lets them use fewer sheets than they
+    // would otherwise, which is presumably why other browsers do this.
+    // Wide pages will be scaled down more than this.
+    static constexpr float minimumShrinkFactor() { return 1.25; }
+
+    // This number determines how small we are willing to reduce the page content
+    // in order to accommodate the widest line. If the page would have to be
+    // reduced smaller to make the widest line fit, we just clip instead (this
+    // behavior matches MacIE and Mozilla, at least)
+    static constexpr float maximumShrinkFactor() { return 2; }
 
 protected:
     Frame* m_frame;
@@ -85,11 +101,14 @@ protected:
 
 private:
     void computePageRectsWithPageSizeInternal(const FloatSize& pageSizeInPixels, bool allowHorizontalTiling);
+    bool beginAndComputePageRectsWithPageSize(Frame&, const FloatSize& pageSizeInPixels);
+    void collectLinkedDestinations(Document&);
+    void outputLinkedDestinations(GraphicsContext&, Document&, const IntRect& pageRect);
 
     // Used to prevent misuses of begin() and end() (e.g., call end without begin).
-    bool m_isPrinting;
-};
+    bool m_isPrinting { false };
 
-}
+    std::unique_ptr<HashMap<String, Ref<Element>>> m_linkedDestinations;
+};
 
-#endif
+} // namespace WebCore