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| 1 // Copyright (c) 2012 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 #include "webkit/plugins/npapi/webplugin_ime_win.h" | |
| 6 | |
| 7 #include <cstring> | |
| 8 #include <string> | |
| 9 #include <vector> | |
| 10 | |
| 11 #include "base/lazy_instance.h" | |
| 12 #include "base/logging.h" | |
| 13 #include "base/strings/utf_string_conversions.h" | |
| 14 #include "base/synchronization/lock.h" | |
| 15 #include "webkit/plugins/npapi/plugin_constants_win.h" | |
| 16 #include "webkit/plugins/npapi/plugin_instance.h" | |
| 17 | |
| 18 #pragma comment(lib, "imm32.lib") | |
| 19 | |
| 20 namespace webkit { | |
| 21 namespace npapi { | |
| 22 | |
| 23 // A critical section that prevents two or more plug-ins from accessing a | |
| 24 // WebPluginIMEWin instance through our patch function. | |
| 25 base::LazyInstance<base::Lock>::Leaky | |
| 26 g_webplugin_ime_lock = LAZY_INSTANCE_INITIALIZER; | |
| 27 | |
| 28 WebPluginIMEWin* WebPluginIMEWin::instance_ = NULL; | |
| 29 | |
| 30 WebPluginIMEWin::WebPluginIMEWin() | |
| 31 : cursor_position_(0), | |
| 32 delta_start_(0), | |
| 33 composing_text_(false), | |
| 34 support_ime_messages_(false), | |
| 35 status_updated_(false), | |
| 36 input_type_(1) { | |
| 37 memset(result_clauses_, 0, sizeof(result_clauses_)); | |
| 38 } | |
| 39 | |
| 40 WebPluginIMEWin::~WebPluginIMEWin() { | |
| 41 } | |
| 42 | |
| 43 void WebPluginIMEWin::CompositionUpdated(const base::string16& text, | |
| 44 std::vector<int> clauses, | |
| 45 std::vector<int> target, | |
| 46 int cursor_position) { | |
| 47 // Send a WM_IME_STARTCOMPOSITION message when a user starts a composition. | |
| 48 NPEvent np_event; | |
| 49 if (!composing_text_) { | |
| 50 composing_text_ = true; | |
| 51 result_text_.clear(); | |
| 52 | |
| 53 np_event.event = WM_IME_STARTCOMPOSITION; | |
| 54 np_event.wParam = 0; | |
| 55 np_event.lParam = 0; | |
| 56 events_.push_back(np_event); | |
| 57 } | |
| 58 | |
| 59 // We can update the following values from this event: GCS_COMPSTR, | |
| 60 // GCS_COMPATTR, GCSCOMPCLAUSE, GCS_CURSORPOS, and GCS_DELTASTART. We send a | |
| 61 // WM_IME_COMPOSITION message to notify the list of updated values. | |
| 62 np_event.event = WM_IME_COMPOSITION; | |
| 63 np_event.wParam = 0; | |
| 64 np_event.lParam = GCS_COMPSTR | GCS_COMPATTR | GCS_COMPCLAUSE | | |
| 65 GCS_CURSORPOS | GCS_DELTASTART; | |
| 66 events_.push_back(np_event); | |
| 67 | |
| 68 // Converts this event to the IMM32 data so we do not have to convert it every | |
| 69 // time when a plug-in call an IMM32 function. | |
| 70 composition_text_ = text; | |
| 71 | |
| 72 // Create the composition clauses returned when a plug-in calls | |
| 73 // ImmGetCompositionString() with GCS_COMPCLAUSE. | |
| 74 composition_clauses_.clear(); | |
| 75 for (size_t i = 0; i < clauses.size(); ++i) | |
| 76 composition_clauses_.push_back(clauses[i]); | |
| 77 | |
| 78 // Create the composition attributes used by GCS_COMPATTR. | |
| 79 if (target.size() == 2) { | |
| 80 composition_attributes_.assign(text.length(), ATTR_CONVERTED); | |
| 81 for (int i = target[0]; i < target[1]; ++i) | |
| 82 composition_attributes_[i] = ATTR_TARGET_CONVERTED; | |
| 83 } else { | |
| 84 composition_attributes_.assign(text.length(), ATTR_INPUT); | |
| 85 } | |
| 86 | |
| 87 cursor_position_ = cursor_position; | |
| 88 delta_start_ = cursor_position; | |
| 89 } | |
| 90 | |
| 91 void WebPluginIMEWin::CompositionCompleted(const base::string16& text) { | |
| 92 composing_text_ = false; | |
| 93 | |
| 94 // We should update the following values when we finish a composition: | |
| 95 // GCS_RESULTSTR, GCS_RESULTCLAUSE, GCS_CURSORPOS, and GCS_DELTASTART. We | |
| 96 // send a WM_IME_COMPOSITION message to notify the list of updated values. | |
| 97 NPEvent np_event; | |
| 98 np_event.event = WM_IME_COMPOSITION; | |
| 99 np_event.wParam = 0; | |
| 100 np_event.lParam = GCS_CURSORPOS | GCS_DELTASTART | GCS_RESULTSTR | | |
| 101 GCS_RESULTCLAUSE; | |
| 102 events_.push_back(np_event); | |
| 103 | |
| 104 // We also send a WM_IME_ENDCOMPOSITION message after the final | |
| 105 // WM_IME_COMPOSITION message (i.e. after finishing a composition). | |
| 106 np_event.event = WM_IME_ENDCOMPOSITION; | |
| 107 np_event.wParam = 0; | |
| 108 np_event.lParam = 0; | |
| 109 events_.push_back(np_event); | |
| 110 | |
| 111 // If the target plug-in does not seem to support IME messages, we send | |
| 112 // each character in IME text with a WM_CHAR message so the plug-in can | |
| 113 // insert the IME text. | |
| 114 if (!support_ime_messages_) { | |
| 115 np_event.event = WM_CHAR; | |
| 116 np_event.wParam = 0; | |
| 117 np_event.lParam = 0; | |
| 118 for (size_t i = 0; i < result_text_.length(); ++i) { | |
| 119 np_event.wParam = result_text_[i]; | |
| 120 events_.push_back(np_event); | |
| 121 } | |
| 122 } | |
| 123 | |
| 124 // Updated the result text and its clause. (Unlike composition clauses, a | |
| 125 // result clause consists of only one region.) | |
| 126 result_text_ = text; | |
| 127 | |
| 128 result_clauses_[0] = 0; | |
| 129 result_clauses_[1] = result_text_.length(); | |
| 130 | |
| 131 cursor_position_ = result_clauses_[1]; | |
| 132 delta_start_ = result_clauses_[1]; | |
| 133 } | |
| 134 | |
| 135 bool WebPluginIMEWin::SendEvents(PluginInstance* instance) { | |
| 136 // We allow the patch functions to access this WebPluginIMEWin instance only | |
| 137 // while we send IME events to the plug-in. | |
| 138 ScopedLock lock(this); | |
| 139 | |
| 140 bool ret = true; | |
| 141 for (std::vector<NPEvent>::iterator it = events_.begin(); | |
| 142 it != events_.end(); ++it) { | |
| 143 if (!instance->NPP_HandleEvent(&(*it))) | |
| 144 ret = false; | |
| 145 } | |
| 146 | |
| 147 events_.clear(); | |
| 148 return ret; | |
| 149 } | |
| 150 | |
| 151 bool WebPluginIMEWin::GetStatus(int* input_type, gfx::Rect* caret_rect) { | |
| 152 *input_type = input_type_; | |
| 153 *caret_rect = caret_rect_; | |
| 154 return true; | |
| 155 } | |
| 156 | |
| 157 // static | |
| 158 FARPROC WebPluginIMEWin::GetProcAddress(LPCSTR name) { | |
| 159 static const struct { | |
| 160 const char* name; | |
| 161 FARPROC function; | |
| 162 } kImm32Functions[] = { | |
| 163 { "ImmAssociateContextEx", | |
| 164 reinterpret_cast<FARPROC>(ImmAssociateContextEx) }, | |
| 165 { "ImmGetCompositionStringW", | |
| 166 reinterpret_cast<FARPROC>(ImmGetCompositionStringW) }, | |
| 167 { "ImmGetContext", reinterpret_cast<FARPROC>(ImmGetContext) }, | |
| 168 { "ImmReleaseContext", reinterpret_cast<FARPROC>(ImmReleaseContext) }, | |
| 169 { "ImmSetCandidateWindow", | |
| 170 reinterpret_cast<FARPROC>(ImmSetCandidateWindow) }, | |
| 171 { "ImmSetOpenStatus", reinterpret_cast<FARPROC>(ImmSetOpenStatus) }, | |
| 172 }; | |
| 173 for (int i = 0; i < arraysize(kImm32Functions); ++i) { | |
| 174 if (!lstrcmpiA(name, kImm32Functions[i].name)) | |
| 175 return kImm32Functions[i].function; | |
| 176 } | |
| 177 return NULL; | |
| 178 } | |
| 179 | |
| 180 void WebPluginIMEWin::Lock() { | |
| 181 g_webplugin_ime_lock.Pointer()->Acquire(); | |
| 182 instance_ = this; | |
| 183 } | |
| 184 | |
| 185 void WebPluginIMEWin::Unlock() { | |
| 186 instance_ = NULL; | |
| 187 g_webplugin_ime_lock.Pointer()->Release(); | |
| 188 } | |
| 189 | |
| 190 // static | |
| 191 WebPluginIMEWin* WebPluginIMEWin::GetInstance(HIMC context) { | |
| 192 return instance_ && context == reinterpret_cast<HIMC>(instance_) ? | |
| 193 instance_ : NULL; | |
| 194 } | |
| 195 | |
| 196 // static | |
| 197 BOOL WINAPI WebPluginIMEWin::ImmAssociateContextEx(HWND window, | |
| 198 HIMC context, | |
| 199 DWORD flags) { | |
| 200 WebPluginIMEWin* instance = GetInstance(context); | |
| 201 if (!instance) | |
| 202 return ::ImmAssociateContextEx(window, context, flags); | |
| 203 | |
| 204 int input_type = !context && !flags; | |
| 205 instance->input_type_ = input_type; | |
| 206 instance->status_updated_ = true; | |
| 207 return TRUE; | |
| 208 } | |
| 209 | |
| 210 // static | |
| 211 LONG WINAPI WebPluginIMEWin::ImmGetCompositionStringW(HIMC context, | |
| 212 DWORD index, | |
| 213 LPVOID dst_data, | |
| 214 DWORD dst_size) { | |
| 215 WebPluginIMEWin* instance = GetInstance(context); | |
| 216 if (!instance) | |
| 217 return ::ImmGetCompositionStringW(context, index, dst_data, dst_size); | |
| 218 | |
| 219 const void* src_data = NULL; | |
| 220 DWORD src_size = 0; | |
| 221 switch (index) { | |
| 222 case GCS_COMPSTR: | |
| 223 src_data = instance->composition_text_.c_str(); | |
| 224 src_size = instance->composition_text_.length() * sizeof(wchar_t); | |
| 225 break; | |
| 226 | |
| 227 case GCS_COMPATTR: | |
| 228 src_data = instance->composition_attributes_.c_str(); | |
| 229 src_size = instance->composition_attributes_.length(); | |
| 230 break; | |
| 231 | |
| 232 case GCS_COMPCLAUSE: | |
| 233 src_data = &instance->composition_clauses_[0]; | |
| 234 src_size = instance->composition_clauses_.size() * sizeof(uint32); | |
| 235 break; | |
| 236 | |
| 237 case GCS_CURSORPOS: | |
| 238 return instance->cursor_position_; | |
| 239 | |
| 240 case GCS_DELTASTART: | |
| 241 return instance->delta_start_; | |
| 242 | |
| 243 case GCS_RESULTSTR: | |
| 244 src_data = instance->result_text_.c_str(); | |
| 245 src_size = instance->result_text_.length() * sizeof(wchar_t); | |
| 246 break; | |
| 247 | |
| 248 case GCS_RESULTCLAUSE: | |
| 249 src_data = &instance->result_clauses_[0]; | |
| 250 src_size = sizeof(instance->result_clauses_); | |
| 251 break; | |
| 252 | |
| 253 default: | |
| 254 break; | |
| 255 } | |
| 256 if (!src_data || !src_size) | |
| 257 return IMM_ERROR_NODATA; | |
| 258 | |
| 259 if (dst_size >= src_size) | |
| 260 memcpy(dst_data, src_data, src_size); | |
| 261 | |
| 262 return src_size; | |
| 263 } | |
| 264 | |
| 265 // static | |
| 266 HIMC WINAPI WebPluginIMEWin::ImmGetContext(HWND window) { | |
| 267 // Call the original ImmGetContext() function if the given window is the one | |
| 268 // created in WebPluginDelegateImpl::WindowedCreatePlugin(). (We attached IME | |
| 269 // context only with the windows created in this function.) On the other hand, | |
| 270 // some windowless plug-ins (such as Flash) call this function with a dummy | |
| 271 // window handle. We return our dummy IME context for these plug-ins so they | |
| 272 // can use our IME emulator. | |
| 273 if (IsWindow(window)) { | |
| 274 wchar_t name[128]; | |
| 275 GetClassName(window, &name[0], arraysize(name)); | |
| 276 if (!wcscmp(&name[0], kNativeWindowClassName)) | |
| 277 return ::ImmGetContext(window); | |
| 278 } | |
| 279 | |
| 280 WebPluginIMEWin* instance = instance_; | |
| 281 if (instance) | |
| 282 instance->support_ime_messages_ = true; | |
| 283 return reinterpret_cast<HIMC>(instance); | |
| 284 } | |
| 285 | |
| 286 // static | |
| 287 BOOL WINAPI WebPluginIMEWin::ImmReleaseContext(HWND window, HIMC context) { | |
| 288 if (!GetInstance(context)) | |
| 289 return ::ImmReleaseContext(window, context); | |
| 290 return TRUE; | |
| 291 } | |
| 292 | |
| 293 // static | |
| 294 BOOL WINAPI WebPluginIMEWin::ImmSetCandidateWindow(HIMC context, | |
| 295 CANDIDATEFORM* candidate) { | |
| 296 WebPluginIMEWin* instance = GetInstance(context); | |
| 297 if (!instance) | |
| 298 return ::ImmSetCandidateWindow(context, candidate); | |
| 299 | |
| 300 gfx::Rect caret_rect(candidate->rcArea); | |
| 301 if ((candidate->dwStyle & CFS_EXCLUDE) && | |
| 302 instance->caret_rect_ != caret_rect) { | |
| 303 instance->caret_rect_ = caret_rect; | |
| 304 instance->status_updated_ = true; | |
| 305 } | |
| 306 return TRUE; | |
| 307 } | |
| 308 | |
| 309 // static | |
| 310 BOOL WINAPI WebPluginIMEWin::ImmSetOpenStatus(HIMC context, BOOL open) { | |
| 311 WebPluginIMEWin* instance = GetInstance(context); | |
| 312 if (!instance) | |
| 313 return ::ImmSetOpenStatus(context, open); | |
| 314 | |
| 315 int input_type = open ? 1 : 0; | |
| 316 if (instance->input_type_ != input_type) { | |
| 317 instance->input_type_ = input_type; | |
| 318 instance->status_updated_ = true; | |
| 319 } | |
| 320 | |
| 321 return TRUE; | |
| 322 } | |
| 323 | |
| 324 } // namespace npapi | |
| 325 } // namespace webkit | |
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Chromium Code Reviews
Issue 19761007:
Move NPAPI implementation out of webkit/plugins/npapi and into content. (Closed)
Base URL: svn://chrome-svn/chrome/trunk/src/