third_party/WebKit/Source/web/WebFontImpl.h

   1 /*
   2  * Copyright (C) 2010 Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  *     * Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *     * Redistributions in binary form must reproduce the above
  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
  13  * distribution.
  14  *     * Neither the name of Google Inc. nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #ifndef WebFontImpl_h
  32 #define WebFontImpl_h
  33
  34 #include "platform/fonts/Font.h"
  35 #include "platform/graphics/paint/DisplayItemClient.h"
  36 #include "public/web/WebFont.h"
  37
  38 namespace blink {
  39
  40 class FontDescription;
  41
  42 class WebFontImpl final : public WebFont {
  43 public:
  44     explicit WebFontImpl(const FontDescription&);
  45
  46     WebFontDescription fontDescription() const override;
  47
  48     int ascent() const override;
  49     int descent() const override;
  50     int height() const override;
  51     int lineSpacing() const override;
  52     float xHeight() const override;
  53
  54     void drawText(WebCanvas*, const WebTextRun&, const WebFloatPoint& leftBaseline, WebColor,
  55         const WebRect& clip) const override;
  56
  57     int calculateWidth(const WebTextRun&) const override;
  58     int offsetForPosition(const WebTextRun&, float position) const override;
  59     WebFloatRect selectionRectForText(const WebTextRun&, const WebFloatPoint& leftBaseline,
  60         int height, int from = 0, int to = -1) const override;
  61
  62     DisplayItemClient displayItemClient() const { return toDisplayItemClient(this); }
  63     String debugName() const { return "WebFontImpl"; }
  64
  65 private:
  66     Font m_font;
  67 };
  68
  69 } // namespace blink
  70
  71 #endif