Port views::KeyEvent functions to aura::KeyEvent.

They will be used for adding IME support to Aura.

BUG=chromium:97261
TEST=try


Review URL: http://codereview.chromium.org/8567021

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@110288 0039d316-1c4b-4281-b951-d872f2087c98

ui/aura/event.cc

@@ -4,10 +4,19 @@
 
 #include "ui/aura/event.h"
 
+#if defined(USE_X11)
+#include <X11/Xlib.h>
+#endif
+
 #include "ui/aura/window.h"
+#include "ui/base/keycodes/keyboard_code_conversion.h"
 #include "ui/gfx/point3.h"
 #include "ui/gfx/transform.h"
 
+#if defined(USE_X11)
+#include "ui/base/keycodes/keyboard_code_conversion_x.h"
+#endif
+
 namespace aura {
 
 Event::Event(ui::EventType type, int flags)
@@ -130,7 +139,9 @@ KeyEvent::KeyEvent(const base::NativeEvent& native_event, bool is_char)
             ui::EventTypeFromNative(native_event),
             ui::EventFlagsFromNative(native_event)),
       key_code_(ui::KeyboardCodeFromNative(native_event)),
-      is_char_(is_char) {
+      is_char_(is_char),
+      character_(0),
+      unmodified_character_(0) {
 }
 
 KeyEvent::KeyEvent(ui::EventType type,
@@ -138,7 +149,63 @@ KeyEvent::KeyEvent(ui::EventType type,
                    int flags)
     : Event(type, flags),
       key_code_(key_code),
-      is_char_(false) {
+      is_char_(false),
+      character_(ui::GetCharacterFromKeyCode(key_code, flags)),
+      unmodified_character_(0) {
+}
+
+uint16 KeyEvent::GetCharacter() const {
+  if (character_)
+    return character_;
+
+#if defined(OS_WIN)
+  return (native_event().message == WM_CHAR) ? key_code_ :
+      ui::GetCharacterFromKeyCode(key_code_, flags());
+#elif defined(USE_X11)
+  if (!native_event())
+    return ui::GetCharacterFromKeyCode(key_code_, flags());
+
+  DCHECK(native_event()->type == KeyPress ||
+         native_event()->type == KeyRelease);
+
+  uint16 ch = ui::DefaultSymbolFromXEvent(native_event());
+  return ch ? ch : ui::GetCharacterFromKeyCode(key_code_, flags());
+#else
+  NOTIMPLEMENTED();
+  return 0;
+#endif
+}
+
+uint16 KeyEvent::GetUnmodifiedCharacter() const {
+  if (unmodified_character_)
+    return unmodified_character_;
+
+#if defined(OS_WIN)
+  // Looks like there is no way to get unmodified character on Windows.
+  return (native_event().message == WM_CHAR) ? key_code_ :
+      ui::GetCharacterFromKeyCode(key_code_, flags() & ui::EF_SHIFT_DOWN);
+#elif defined(USE_X11)
+  if (!native_event())
+    return ui::GetCharacterFromKeyCode(key_code_, flags() & ui::EF_SHIFT_DOWN);
+
+  DCHECK(native_event()->type == KeyPress ||
+         native_event()->type == KeyRelease);
+
+  XKeyEvent *key = &native_event()->xkey;
+
+  static const unsigned int kIgnoredModifiers = ControlMask | LockMask |
+      Mod1Mask | Mod2Mask | Mod3Mask | Mod4Mask | Mod5Mask;
+
+  // We can't use things like (key.state & ShiftMask), as it may mask out bits
+  // used by X11 internally.
+  key->state &= ~kIgnoredModifiers;
+  uint16 ch = ui::DefaultSymbolFromXEvent(native_event());
+  return ch ? ch :
+      ui::GetCharacterFromKeyCode(key_code_, flags() & ui::EF_SHIFT_DOWN);
+#else
+  NOTIMPLEMENTED();
+  return 0;
+#endif
 }
 
 }  // namespace aura

ui/aura/event.h

@@ -150,6 +150,23 @@ class AURA_EXPORT KeyEvent : public Event {
            ui::KeyboardCode key_code,
            int flags);
 
+  // These setters allow an I18N virtual keyboard to fabricate a keyboard event
+  // which does not have a corresponding ui::KeyboardCode (example: U+00E1 Latin
+  // small letter A with acute, U+0410 Cyrillic capital letter A.)
+  // GetCharacter() and GetUnmodifiedCharacter() return the character.
+  void set_character(uint16 character) { character_ = character; }
+  void set_unmodified_character(uint16 unmodified_character) {
+    unmodified_character_ = unmodified_character;
+  }
+
+  // Gets the character generated by this key event. It only supports Unicode
+  // BMP characters.
+  uint16 GetCharacter() const;
+
+  // Gets the character generated by this key event ignoring concurrently-held
+  // modifiers (except shift).
+  uint16 GetUnmodifiedCharacter() const;
+
   ui::KeyboardCode key_code() const { return key_code_; }
   bool is_char() const { return is_char_; }
 
@@ -158,6 +175,9 @@ class AURA_EXPORT KeyEvent : public Event {
   // True if this is a translated character event (vs. a raw key down). Both
   // share the same type: ui::ET_KEY_PRESSED.
   bool is_char_;
+
+  uint16 character_;
+  uint16 unmodified_character_;
 };
 
 }  // namespace aura