src/ppapi/cpp/trusted/browser_font_trusted.h

   1 // Copyright (c) 2011 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 PPAPI_CPP_TRUSTED_BROWSER_FONT_TRUSTED_H_
   6 #define PPAPI_CPP_TRUSTED_BROWSER_FONT_TRUSTED_H_
   7
   8 #include <string>
   9
  10 #include "ppapi/c/trusted/ppb_browser_font_trusted.h"
  11 #include "ppapi/cpp/resource.h"
  12 #include "ppapi/cpp/var.h"
  13
  14 namespace pp {
  15
  16 class ImageData;
  17 class InstanceHandle;
  18 class Point;
  19 class Rect;
  20
  21 // BrowserFontDescription ------------------------------------------------------
  22
  23 class BrowserFontDescription {
  24  public:
  25   BrowserFontDescription();
  26   BrowserFontDescription(const BrowserFontDescription& other);
  27   ~BrowserFontDescription();
  28
  29   BrowserFontDescription& operator=(const BrowserFontDescription& other);
  30
  31   const PP_BrowserFont_Trusted_Description& pp_font_description() const {
  32     return pp_font_description_;
  33   }
  34
  35   Var face() const { return face_; }
  36   void set_face(const Var& face) {
  37     face_ = face;
  38     pp_font_description_.face = face_.pp_var();
  39   }
  40
  41   PP_BrowserFont_Trusted_Family family() const {
  42     return pp_font_description_.family;
  43   }
  44   void set_family(PP_BrowserFont_Trusted_Family f) {
  45     pp_font_description_.family = f;
  46   }
  47
  48   uint32_t size() const { return pp_font_description_.size; }
  49   void set_size(uint32_t s) { pp_font_description_.size = s; }
  50
  51   PP_BrowserFont_Trusted_Weight weight() const {
  52     return pp_font_description_.weight;
  53   }
  54   void set_weight(PP_BrowserFont_Trusted_Weight w) {
  55     pp_font_description_.weight = w;
  56   }
  57
  58   bool italic() const { return PP_ToBool(pp_font_description_.italic); }
  59   void set_italic(bool i) { pp_font_description_.italic = PP_FromBool(i); }
  60
  61   bool small_caps() const {
  62     return PP_ToBool(pp_font_description_.small_caps);
  63   }
  64   void set_small_caps(bool s) {
  65     pp_font_description_.small_caps = PP_FromBool(s);
  66   }
  67
  68   int letter_spacing() const { return pp_font_description_.letter_spacing; }
  69   void set_letter_spacing(int s) { pp_font_description_.letter_spacing = s; }
  70
  71   int word_spacing() const { return pp_font_description_.word_spacing; }
  72   void set_word_spacing(int w) { pp_font_description_.word_spacing = w; }
  73
  74  private:
  75   friend class BrowserFont_Trusted;
  76
  77   Var face_;  // Manages memory for pp_font_description_.face
  78   PP_BrowserFont_Trusted_Description pp_font_description_;
  79 };
  80
  81 // BrowserFontTextRun ----------------------------------------------------------
  82
  83 class BrowserFontTextRun {
  84  public:
  85   BrowserFontTextRun();
  86   BrowserFontTextRun(const std::string& text,
  87                      bool rtl = false,
  88                      bool override_direction = false);
  89   BrowserFontTextRun(const BrowserFontTextRun& other);
  90   ~BrowserFontTextRun();
  91
  92   BrowserFontTextRun& operator=(const BrowserFontTextRun& other);
  93
  94   const PP_BrowserFont_Trusted_TextRun& pp_text_run() const {
  95     return pp_text_run_;
  96   }
  97
  98  private:
  99   Var text_;  // Manages memory for the reference in pp_text_run_.
 100   PP_BrowserFont_Trusted_TextRun pp_text_run_;
 101 };
 102
 103 // BrowserFont_Trusted ---------------------------------------------------------
 104
 105 // Provides access to system fonts.
 106 class BrowserFont_Trusted : public Resource {
 107  public:
 108   // Creates an is_null() Font object.
 109   BrowserFont_Trusted();
 110
 111   explicit BrowserFont_Trusted(PP_Resource resource);
 112   BrowserFont_Trusted(const InstanceHandle& instance,
 113                       const BrowserFontDescription& description);
 114   BrowserFont_Trusted(const BrowserFont_Trusted& other);
 115
 116   BrowserFont_Trusted& operator=(const BrowserFont_Trusted& other);
 117
 118   // PPB_Font methods:
 119   static Var GetFontFamilies(const InstanceHandle& instance);
 120   bool Describe(BrowserFontDescription* description,
 121                 PP_BrowserFont_Trusted_Metrics* metrics) const;
 122   bool DrawTextAt(ImageData* dest,
 123                   const BrowserFontTextRun& text,
 124                   const Point& position,
 125                   uint32_t color,
 126                   const Rect& clip,
 127                   bool image_data_is_opaque) const;
 128   int32_t MeasureText(const BrowserFontTextRun& text) const;
 129   uint32_t CharacterOffsetForPixel(const BrowserFontTextRun& text,
 130                                    int32_t pixel_position) const;
 131   int32_t PixelOffsetForCharacter(const BrowserFontTextRun& text,
 132                                   uint32_t char_offset) const;
 133
 134   // Convenience function that assumes a left-to-right string with no clipping.
 135   bool DrawSimpleText(ImageData* dest,
 136                       const std::string& text,
 137                       const Point& position,
 138                       uint32_t color,
 139                       bool image_data_is_opaque = false) const;
 140
 141   // Convenience function that assumes a left-to-right string.
 142   int32_t MeasureSimpleText(const std::string& text) const;
 143 };
 144
 145 }  // namespace pp
 146
 147 #endif  // PPAPI_CPP_TRUSTED_BROWSER_FONT_TRUSTED_H_