1 /* libs/graphics/xml/SkJS.cpp 2 ** 3 ** Copyright 2006, The Android Open Source Project 4 ** 5 ** Licensed under the Apache License, Version 2.0 (the "License"); 6 ** you may not use this file except in compliance with the License. 7 ** You may obtain a copy of the License at 8 ** 9 ** http://www.apache.org/licenses/LICENSE-2.0 10 ** 11 ** Unless required by applicable law or agreed to in writing, software 12 ** distributed under the License is distributed on an "AS IS" BASIS, 13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 ** See the License for the specific language governing permissions and 15 ** limitations under the License. 16 */ 17 18 #include <jsapi.h> 19 20 #include "SkJS.h" 21 #include "SkString.h" 22 23 #ifdef _WIN32_WCE 24 extern "C" { 25 void abort() { 26 SkASSERT(0); 27 } 28 29 unsigned int _control87(unsigned int _new, unsigned int mask ) { 30 SkASSERT(0); 31 return 0; 32 } 33 34 time_t mktime(struct tm *timeptr ) { 35 SkASSERT(0); 36 return 0; 37 } 38 39 // int errno; 40 41 char *strdup(const char *) { 42 SkASSERT(0); 43 return 0; 44 } 45 46 char *strerror(int errnum) { 47 SkASSERT(0); 48 return 0; 49 } 50 51 int isatty(void* fd) { 52 SkASSERT(0); 53 return 0; 54 } 55 56 int putenv(const char *envstring) { 57 SkASSERT(0); 58 return 0; 59 } 60 61 char *getenv(const char *varname) { 62 SkASSERT(0); 63 return 0; 64 } 65 66 void GetSystemTimeAsFileTime(LPFILETIME lpSystemTimeAsFileTime) { 67 SkASSERT(0); 68 } 69 70 struct tm * localtime(const time_t *timer) { 71 SkASSERT(0); 72 return 0; 73 } 74 75 size_t strftime(char *strDest, size_t maxsize, const char *format, 76 const struct tm *timeptr ) { 77 SkASSERT(0); 78 return 0; 79 } 80 81 } 82 #endif 83 84 static JSBool 85 global_enumerate(JSContext *cx, JSObject *obj) 86 { 87 #ifdef LAZY_STANDARD_CLASSES 88 return JS_EnumerateStandardClasses(cx, obj); 89 #else 90 return JS_TRUE; 91 #endif 92 } 93 94 static JSBool 95 global_resolve(JSContext *cx, JSObject *obj, jsval id, uintN flags, JSObject **objp) 96 { 97 #ifdef LAZY_STANDARD_CLASSES 98 if ((flags & JSRESOLVE_ASSIGNING) == 0) { 99 JSBool resolved; 100 101 if (!JS_ResolveStandardClass(cx, obj, id, &resolved)) 102 return JS_FALSE; 103 if (resolved) { 104 *objp = obj; 105 return JS_TRUE; 106 } 107 } 108 #endif 109 110 #if defined(SHELL_HACK) && defined(DEBUG) && defined(XP_UNIX) 111 if ((flags & (JSRESOLVE_QUALIFIED | JSRESOLVE_ASSIGNING)) == 0) { 112 /* 113 * Do this expensive hack only for unoptimized Unix builds, which are 114 * not used for benchmarking. 115 */ 116 char *path, *comp, *full; 117 const char *name; 118 JSBool ok, found; 119 JSFunction *fun; 120 121 if (!JSVAL_IS_STRING(id)) 122 return JS_TRUE; 123 path = getenv("PATH"); 124 if (!path) 125 return JS_TRUE; 126 path = JS_strdup(cx, path); 127 if (!path) 128 return JS_FALSE; 129 name = JS_GetStringBytes(JSVAL_TO_STRING(id)); 130 ok = JS_TRUE; 131 for (comp = strtok(path, ":"); comp; comp = strtok(NULL, ":")) { 132 if (*comp != '\0') { 133 full = JS_smprintf("%s/%s", comp, name); 134 if (!full) { 135 JS_ReportOutOfMemory(cx); 136 ok = JS_FALSE; 137 break; 138 } 139 } else { 140 full = (char *)name; 141 } 142 found = (access(full, X_OK) == 0); 143 if (*comp != '\0') 144 free(full); 145 if (found) { 146 fun = JS_DefineFunction(cx, obj, name, Exec, 0, JSPROP_ENUMERATE); 147 ok = (fun != NULL); 148 if (ok) 149 *objp = obj; 150 break; 151 } 152 } 153 JS_free(cx, path); 154 return ok; 155 } 156 #else 157 return JS_TRUE; 158 #endif 159 } 160 161 JSClass global_class = { 162 "global", JSCLASS_NEW_RESOLVE, 163 JS_PropertyStub, JS_PropertyStub, 164 JS_PropertyStub, JS_PropertyStub, 165 global_enumerate, (JSResolveOp) global_resolve, 166 JS_ConvertStub, JS_FinalizeStub 167 }; 168 169 SkJS::SkJS(void* hwnd) : SkOSWindow(hwnd) { 170 if ((fRuntime = JS_NewRuntime(0x100000)) == NULL) { 171 SkASSERT(0); 172 return; 173 } 174 if ((fContext = JS_NewContext(fRuntime, 0x1000)) == NULL) { 175 SkASSERT(0); 176 return; 177 } 178 ; 179 if ((fGlobal = JS_NewObject(fContext, &global_class, NULL, NULL)) == NULL) { 180 SkASSERT(0); 181 return; 182 } 183 if (JS_InitStandardClasses(fContext, fGlobal) == NULL) { 184 SkASSERT(0); 185 return; 186 } 187 setConfig(SkBitmap::kARGB32_Config); 188 updateSize(); 189 setVisibleP(true); 190 InitializeDisplayables(getBitmap(), fContext, fGlobal, NULL); 191 } 192 193 SkJS::~SkJS() { 194 DisposeDisplayables(); 195 JS_DestroyContext(fContext); 196 JS_DestroyRuntime(fRuntime); 197 JS_ShutDown(); 198 } 199 200 SkBool SkJS::EvaluateScript(const char* script, jsval* rVal) { 201 return JS_EvaluateScript(fContext, fGlobal, script, strlen(script), 202 "memory" /* no file name */, 0 /* no line number */, rVal); 203 } 204 205 SkBool SkJS::ValueToString(jsval value, SkString* string) { 206 JSString* str = JS_ValueToString(fContext, value); 207 if (str == NULL) 208 return false; 209 string->set(JS_GetStringBytes(str)); 210 return true; 211 } 212 213 #ifdef SK_DEBUG 214 void SkJS::Test(void* hwnd) { 215 SkJS js(hwnd); 216 jsval val; 217 SkBool success = js.EvaluateScript("22/7", &val); 218 SkASSERT(success); 219 SkString string; 220 success = js.ValueToString(val, &string); 221 SkASSERT(success); 222 SkASSERT(strcmp(string.c_str(), "3.142857142857143") == 0); 223 success = js.EvaluateScript( 224 "var rect = new rectangle();" 225 "rect.left = 4;" 226 "rect.top = 10;" 227 "rect.right = 20;" 228 "rect.bottom = 30;" 229 "rect.width = rect.height + 20;" 230 "rect.draw();" 231 , &val); 232 SkASSERT(success); 233 success = js.ValueToString(val, &string); 234 SkASSERT(success); 235 } 236 #endifASSERT(success); 237 238
