third_party/WebKit/Source/core/layout/LayoutPagedFlowThread.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef LayoutPagedFlowThread_h
   6 #define LayoutPagedFlowThread_h
   7
   8 #include "core/layout/LayoutMultiColumnFlowThread.h"
   9
  10 namespace blink {
  11
  12 // A flow thread for paged overflow. FIXME: The current implementation relies on the multicol
  13 // implementation, but it in the long run it would be better to have what's common between
  14 // LayoutMultiColumnFlowThread and LayoutPagedFlowThread in LayoutFlowThread, and have both of them
  15 // inherit from that one.
  16 class LayoutPagedFlowThread : public LayoutMultiColumnFlowThread {
  17 public:
  18     static LayoutPagedFlowThread* createAnonymous(Document&, const ComputedStyle& parentStyle);
  19
  20     LayoutBlockFlow* pagedBlockFlow() const { return toLayoutBlockFlow(parent()); }
  21
  22     // Return the number of pages. Will never be less than 1.
  23     int pageCount();
  24
  25     bool isLayoutPagedFlowThread() const override { return true; }
  26     const char* name() const override { return "LayoutPagedFlowThread"; }
  27     bool needsNewWidth() const override;
  28     void updateLogicalWidth() override;
  29     virtual void layout();
  30
  31 private:
  32     bool descendantIsValidColumnSpanner(LayoutObject* /*descendant*/) const override { return false; }
  33 };
  34
  35 } // namespace blink
  36
  37 #endif // LayoutPagedFlowThread_h