1 files changed, 155 insertions, 0 deletions
diff --git a/src/gui_attrtext.hh b/src/gui_attrtext.hh
new file mode 100644
index 0000000..129f905
--- /dev/null
+++ b/src/gui_attrtext.hh
@@ -0,0 +1,155 @@
+// -*- mode: c++; c-basic-offset: 2; -*-
+
+#ifndef GUI_ATTRTEXT_HH
+#define GUI_ATTRTEXT_HH
+
+#include <string>
+
+class AttributedText {
+public:
+  class Attribute {
+  private:
+    static const uint8_t BOLD;
+    static const uint8_t ITALIC;
+    static const uint8_t UNDERLINE;
+    static const uint8_t STRIKE;
+  public:
+    Attribute()
+      : fg_(0), bg_(0), flags_(0) {
+    }
+    Attribute(uint32_t foreground, uint32_t background)
+      : fg_(foreground), bg_(background), flags_(0) {
+    }
+    Attribute(uint8_t r, uint8_t g, uint8_t b)
+      : bg_(0), flags_(0) {
+      set_foreground(r, g, b);
+    }
+    Attribute(uint8_t fg_r, uint8_t fg_g, uint8_t fg_b, uint8_t bg_r, uint8_t bg_g, uint8_t bg_b)
+      : flags_(0) {
+      set_foreground(fg_r, fg_g, fg_b);
+      set_background(bg_r, bg_g, bg_b);
+    }
+
+    bool operator==(Attribute const& attr) const {
+      return flags_ == attr.flags_ && fg_ == attr.fg_ && bg_ == attr.bg_;
+    }
+    bool operator!=(Attribute const& attr) const {
+      return !(*this == attr);
+    }
+
+    bool bold() const {
+      return flags_ & BOLD;
+    }
+    void set_bold(bool value) {
+      set_flag(value, BOLD);
+    }
+    bool italic() const {
+      return flags_ & ITALIC;
+    }
+    void set_italic(bool value) {
+      set_flag(value, ITALIC);
+    }
+    bool underline() const {
+      return flags_ & UNDERLINE;
+    }
+    void set_underline(bool value) {
+      set_flag(value, UNDERLINE);
+    }
+    bool strike() const {
+      return flags_ & STRIKE;
+    }
+    void set_strike(bool value) {
+      set_flag(value, STRIKE);
+    }
+
+    uint32_t foreground() const {
+      return fg_;
+    }
+    uint32_t has_foreground() const {
+      return has(fg_);
+    }
+
+    void set_foreground(uint32_t fg) {
+      fg_ = fg;
+      if (!has_foreground()) fg_ = 0;
+    }
+    void set_foreground(uint8_t r, uint8_t g, uint8_t b) {
+      fg_ = set(r, g, b);
+    }
+    void clear_foreground() {
+      fg_ = 0;
+    }
+
+    uint32_t background() const {
+      return bg_;
+    }
+    uint32_t has_background() const {
+      return has(bg_);
+    }
+
+    void set_background(uint32_t bg) {
+      bg_ = bg;
+      if (!has_background()) bg_ = 0;
+    }
+    void set_background(uint8_t r, uint8_t g, uint8_t b) {
+      bg_ = set(r, g, b);
+    }
+    void clear_background() {
+      bg_ = 0;
+    }
+
+    size_t hash() const {
+      return flags_ + ((fg_ | bg_) >> 8);
+    }
+
+    void add(Attribute const& attr);
+
+  protected:
+    void set_flag(bool value, uint8_t flag) {
+      if (value) {
+        flags_ |= flag;
+      } else {
+        flags_ &= ~flag;
+      }
+    }
+
+    static bool has(uint32_t clr) {
+      return clr & 0xff000000;
+    }
+
+    static uint32_t set(uint8_t r, uint8_t g, uint8_t b) {
+      return 0xff000000 | (r << 16) | (g << 8) | b;
+    }
+
+    uint32_t fg_, bg_;
+    uint8_t flags_;
+  };
+
+  static const Attribute EMPTY;
+
+  virtual ~AttributedText() {}
+
+  static AttributedText* create();
+
+  void append(std::string const& str, Attribute const& attr = EMPTY,
+              size_t start = 0, size_t length = std::string::npos);
+  void append(const char* str, Attribute const& attr = EMPTY,
+              size_t start = 0, size_t length = std::string::npos);
+  virtual void append(const char* str, size_t len, Attribute const& attr = EMPTY,
+                      size_t start = 0, size_t length = std::string::npos) = 0;
+
+  virtual void add(Attribute const& attr, size_t start = 0, size_t length = std::string::npos) = 0;
+  virtual void set(Attribute const& attr, size_t start = 0, size_t length = std::string::npos) = 0;
+  virtual void clear(size_t start = 0, size_t length = std::string::npos) = 0;
+
+  virtual std::string text() const = 0;
+
+protected:
+  AttributedText() {}
+
+private:
+  AttributedText(AttributedText const&) = delete;
+  AttributedText& operator=(AttributedText const&) = delete;
+};
+
+#endif  // GUI_ATTRTEXT_HH