File: ScriptingHost.cpp

package info (click to toggle)
0ad 0~r11863-2
  • links: PTS, VCS
  • area: main
  • in suites: wheezy
  • size: 30,560 kB
  • sloc: cpp: 201,230; ansic: 28,387; sh: 10,593; perl: 4,847; python: 2,240; makefile: 658; java: 412; xml: 243; sql: 40
file content (217 lines) | stat: -rw-r--r-- 6,485 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
/* Copyright (C) 2010 Wildfire Games.
 * This file is part of 0 A.D.
 *
 * 0 A.D. is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * 0 A.D. is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "precompiled.h"

#include <sstream>

#include "ScriptingHost.h"
#include "ScriptGlue.h"
#include "lib/utf8.h"
#include "ps/Profile.h"
#include "ps/CLogger.h"
#include "ps/Filesystem.h"
#include "scriptinterface/ScriptInterface.h"

ScriptingHost::ScriptingHost()
{
	m_ScriptInterface = new ScriptInterface("Engine", "GUI", ScriptInterface::CreateRuntime());

    m_Context = m_ScriptInterface->GetContext();

	m_GlobalObject = JS_GetGlobalObject(m_Context);

	if (!JS_DefineFunctions(m_Context, m_GlobalObject, ScriptFunctionTable))
		throw PSERROR_Scripting_SetupFailed();

	if (!JS_DefineProperties(m_Context, m_GlobalObject, ScriptGlobalTable))
		throw PSERROR_Scripting_SetupFailed();
}

ScriptingHost::~ScriptingHost()
{
	delete m_ScriptInterface;
}

ScriptInterface& ScriptingHost::GetScriptInterface()
{
	return *m_ScriptInterface;
}

void ScriptingHost::FinalShutdown()
{
	// This should only be called once per process, just to clean up before
	// we report memory leaks. (Otherwise, if it's called while there are
	// other contexts active in other threads, things will break.)
	JS_ShutDown();
}

// filename, line and globalObject default to 0 (in which case we execute
// the whole script / use our m_GlobalObject)
void ScriptingHost::RunMemScript(const char* script, size_t size, const char* filename, int line, JSObject* globalObject)
{
	if(!filename)
		filename = "unspecified file";
	if(!globalObject)
		globalObject = m_GlobalObject;

	// Maybe TODO: support Unicode input formats?

	jsval rval;
	JSBool ok = JS_EvaluateScript(m_Context, globalObject, script, (uintN)size, filename, line, &rval); 

	if (ok == JS_FALSE)
		throw PSERROR_Scripting_LoadFile_EvalErrors();
}

// globalObject defaults to 0 (in which case we use our m_GlobalObject).
void ScriptingHost::RunScript(const VfsPath& pathname, JSObject* globalObject)
{
	if(!globalObject)
		globalObject = m_GlobalObject;

	shared_ptr<u8> buf; size_t size;
	if(g_VFS->LoadFile(pathname, buf, size) != INFO::OK)	// ERRTODO: translate/pass it on
		throw PSERROR_Scripting_LoadFile_OpenFailed();

	std::wstring scriptw = wstring_from_utf8(std::string(buf.get(), buf.get() + size));
	utf16string script(scriptw.begin(), scriptw.end());

	jsval rval;
	JSBool ok = JS_EvaluateUCScript(m_Context, globalObject,
		reinterpret_cast<const jschar*>(script.c_str()), (uintN)script.size(),
		utf8_from_wstring(pathname.string()).c_str(), 1, &rval);

	if (ok == JS_FALSE)
		throw PSERROR_Scripting_LoadFile_EvalErrors();
}

jsval ScriptingHost::ExecuteScript(const CStrW& script, const CStrW& calledFrom, JSObject* contextObject )
{
	jsval rval; 

	JSBool ok = JS_EvaluateUCScript(m_Context, contextObject ? contextObject : m_GlobalObject,
		reinterpret_cast<const jschar*>(script.utf16().c_str()), (int)script.length(),
		calledFrom.ToUTF8().c_str(), 1, &rval);

	if (!ok) return JSVAL_NULL;

	return rval;
}

void ScriptingHost::DefineCustomObjectType(JSClass *clasp, JSNative constructor, uintN minArgs, JSPropertySpec *ps, JSFunctionSpec *fs, JSPropertySpec *static_ps, JSFunctionSpec *static_fs)
{
	std::string typeName = clasp->name;

	if (m_CustomObjectTypes.find(typeName) != m_CustomObjectTypes.end())
	{
		// This type already exists
		throw PSERROR_Scripting_DefineType_AlreadyExists();
	}

	JSObject * obj = JS_InitClass(	m_Context, m_GlobalObject, 0, 
									clasp,
									constructor, minArgs,				// Constructor, min args
									ps, fs,								// Properties, methods
									static_ps, static_fs);				// Constructor properties, methods

	if (obj == NULL)
		throw PSERROR_Scripting_DefineType_CreationFailed();

	CustomType type;
	
	type.m_Object = obj;
	type.m_Class = clasp;

	m_CustomObjectTypes[typeName] = type;
}

JSObject * ScriptingHost::CreateCustomObject(const std::string & typeName)
{
	std::map < std::string, CustomType > ::iterator it = m_CustomObjectTypes.find(typeName);

	if (it == m_CustomObjectTypes.end())
		throw PSERROR_Scripting_TypeDoesNotExist();

	return JS_ConstructObject(m_Context, (*it).second.m_Class, (*it).second.m_Object, NULL);

}



void ScriptingHost::SetObjectProperty(JSObject * object, const std::string & propertyName, jsval value)
{
	JS_SetProperty(m_Context, object, propertyName.c_str(), &value);
}

jsval ScriptingHost::GetObjectProperty( JSObject* object, const std::string& propertyName )
{
	jsval vp;
	JS_GetProperty( m_Context, object, propertyName.c_str(), &vp );
	return( vp );
}



void ScriptingHost::SetObjectProperty_Double(JSObject* object, const char* propertyName, double value)
{
	jsval v;
	if (! JS_NewNumberValue(m_Context, value, &v))
		throw PSERROR_Scripting_ConversionFailed();

	if (! JS_SetProperty(m_Context, object, propertyName, &v))
		throw PSERROR_Scripting_ConversionFailed();
}

double ScriptingHost::GetObjectProperty_Double(JSObject* object, const char* propertyName)
{
	jsval v;
	double d;

	if (! JS_GetProperty(m_Context, object, propertyName, &v))
		throw PSERROR_Scripting_ConversionFailed();
	if (! JS_ValueToNumber(m_Context, v, &d))
		throw PSERROR_Scripting_ConversionFailed();
	return d;
}



void ScriptingHost::SetGlobal(const std::string &globalName, jsval value)
{
	JS_SetProperty(m_Context, m_GlobalObject, globalName.c_str(), &value);
}



//----------------------------------------------------------------------------
// conversions
//----------------------------------------------------------------------------

CStrW ScriptingHost::ValueToUCString( const jsval value )
{
	JSString* string = JS_ValueToString(m_Context, value);
	if (string == NULL)
		throw PSERROR_Scripting_ConversionFailed();

	size_t length;
	const jschar *strptr = JS_GetStringCharsAndLength(m_Context, string, &length);
	if (!strptr)
		throw PSERROR_Scripting_ConversionFailed();

	return std::wstring(strptr, strptr+length);
}