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/*
* This source file is part of libRocket, the HTML/CSS Interface Middleware
*
* For the latest information, see http://www.librocket.com
*
* Copyright (c) 2008-2010 CodePoint Ltd, Shift Technology Ltd
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/
#include "precompiled.h"
#include "ElementDocumentWrapper.h"
#include "../../../Include/Rocket/Core/Stream.h"
#include "../../../Include/Rocket/Core/Python/Utilities.h"
namespace Rocket {
namespace Core {
namespace Python {
ElementDocumentWrapper::ElementDocumentWrapper(PyObject* self, const char* tag) : ElementWrapper< ElementDocument >(self, tag)
{
Rocket::Core::String module_id(32, "document_%x", this);
// Create a new module
module = PyModule_New(module_id.CString());
module_namespace = PyModule_GetDict(module);
// Merging main into the module
PyObject* builtins = PyImport_AddModule("__main__");
PyObject* builtins_dict = PyModule_GetDict( builtins);
PyDict_Merge(module_namespace, builtins_dict, 0);
// Insert the document global
PyDict_SetItemString(module_namespace, "document", self);
}
ElementDocumentWrapper::~ElementDocumentWrapper()
{
// Release the module
Py_DECREF(module);
}
void ElementDocumentWrapper::LoadScript(Rocket::Core::Stream* stream, const Rocket::Core::String& source_name)
{
// If theres a source, check if the code is already loaded and just reuse it
if (!source_name.Empty())
{
Rocket::Core::String module_name = Rocket::Core::String(source_name).Replace("/", "_");
module_name = module_name.Replace("\\", "_");
module_name = module_name.Replace(".py", "");
PyObject* modules = PyImport_GetModuleDict();
PyObject* merge_module = PyDict_GetItemString(modules, module_name.CString());
#ifdef ROCKET_DEBUG
// In debug builds, force module to NULL so that scripts are always reloaded
merge_module = NULL;
#else
if (merge_module)
{
Py_INCREF(merge_module);
}
#endif
if (!merge_module)
{
// Compile the code as a python module
Rocket::Core::String source_buffer;
PreprocessCode(source_buffer, stream);
PyObject* code = Py_CompileString(source_buffer.CString(), source_name.CString(), Py_file_input);
if (code)
{
merge_module = PyImport_ExecCodeModule((char*)module_name.CString(), code);
Py_DECREF(code);
}
}
if (merge_module)
{
PyObject* dict = PyModule_GetDict(merge_module);
PyDict_Merge(module_namespace, dict, 0);
Py_DECREF(merge_module);
}
else
{
Rocket::Core::Python::Utilities::PrintError();
}
}
else
{
// Compile directly onto the python module
Rocket::Core::String source_buffer;
PreprocessCode(source_buffer, stream);
PyObject* result = PyRun_String(source_buffer.CString(), Py_file_input, module_namespace, module_namespace);
if ( !result )
{
Rocket::Core::Python::Utilities::PrintError();
}
else
{
Py_DECREF(result);
}
}
}
PyObject* ElementDocumentWrapper::GetModuleNamespace()
{
return module_namespace;
}
void ElementDocumentWrapper::PreprocessCode(Rocket::Core::String &code, Rocket::Core::Stream *stream)
{
// Load in the script
Rocket::Core::String buffer;
stream->Read(buffer, stream->Length());
// Strip comments and build up code
code = "";
size_t i = 0;
size_t line_start = 0;
enum ParseState { START, COMMENT, DATA };
ParseState state = START;
while (i < buffer.Length())
{
// Python doesn't like \r's, strip them
if (buffer[i] == '\r')
{
buffer.Erase(i, 1);
// Make sure we get out if there are no characters left
if (i == buffer.Length())
continue;
}
switch (state)
{
case START:
{
// Check for the start of comments or non whitespace data
if (buffer[i] == '#')
state = COMMENT;
else if (!Rocket::Core::StringUtilities::IsWhitespace(buffer[i]))
state = DATA;
}
break;
default:
{
// If we've hit the end of the line, process as required
if (buffer[i] == '\n')
{
if (state == DATA)
code += buffer.Substring(line_start, i - line_start + 1);
state = START;
line_start = i + 1;
}
}
break;
}
i++;
}
}
}
}
}
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