cefpython/cefpython/cefpython.pyx at master · MrEricSir/cefpython · GitHub

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# License: New BSD License.

# Website: http://code.google.com/p/cefpython/

# IMPORTANT notes:

# - cdef/cpdef functions returning something other than a Python object

# should have in its declaration "except *", otherwise exceptions are

# ignored. Those cdef/cpdef that return "object" have "except *" by

# default. The setup/compile.py script will check for functions missing

# "except *" and will display an error message about that, but it's

# not perfect and won't detect all cases.

# - TODO: add checking for "except * with gil" in functions with the

# "public" keyword

# - about acquiring/releasing GIL lock, see discussion here:

# https://groups.google.com/forum/?fromgroups=#!topic/cython-users/jcvjpSOZPp0

# - <CefRefPtr[ClientHandler]?>new ClientHandler()

# <...?> means to throw an error if the cast is not allowed

# - in client handler callbacks (or others that are called from C++ and

# use "except * with gil") must embrace all code in try..except otherwise

# the error will be ignored, only printed to the output console, this is the

# default behavior of Cython, to remedy this you are supposed to add "except *"

# in function declaration, unfortunately it does not work, some conflict with

# CEF threading, see topic at cython-users for more details:

# https://groups.google.com/d/msg/cython-users/CRxWoX57dnM/aufW3gXMhOUJ.

# - Note that acquiring the GIL is a blocking thread-synchronising operation,

# and therefore potentially costly. It might not be worth releasing the GIL

# for minor calculations. Usually, I/O operations and substantial

# computations in parallel code will benefit from it.

# - In regards to GIL locks see Issue #102 "Remove GIL to avoid deadlocks when

# calling CEF functions".

# - CTags requires all functions/methods imported in .pxd files to be preceded with "cdef",

# otherwise they are not indexed.

# - __del__ method does not exist in Extension Types (cdef class),

# you have to use __dealloc__ instead, try to remember that as

# defining __del__ will not raise any warning and could lead to

# memory leaks.

# - CefString.c_str() is safe to use only on Windows, on Ubuntu 64bit

# for a "Pers" string it returns: "P\x00e\x00r\x00s\x00", which is

# most probably not what you expected.

# - You can rename methods when importing in pxd files:

# | cdef cppclass _Object "Object":

# - Supporting operators that are not yet supported:

# | CefRefPtr[T]& Assign "operator="(T* p)

# | cefBrowser.Assign(CefBrowser*)

# In the same way you can import function with a different name, this one

# imports a static method Create() while adding a prefix "CefSome_":

# | cdef extern from "..":

# | static CefRefPtr[CefSome] CefSome_Create "CefSome::Create"()

# - Declaring C++ classes in Cython. Storing python callbacks

# in a C++ class using Py_INCREF, Py_DECREF. Calling from

# C++ using PyObject_CallMethod.

# | http://stackoverflow.com/a/17070382/623622

# Disadvantage: when calling python callback from the C++ class

# declared in Cython there is no easy way to propagate the python

# exceptions when they occur during execution of the callback.

# - | cdef char* other_c_string = py_string

# This is a very fast operation after which other_c_string points

# to the byte string buffer of the Python string itself. It is

# tied to the life time of the Python string. When the Python

# string is garbage collected, the pointer becomes invalid.

# - When defining cpdef functions returning "cpp_bool":

# | cpdef cpp_bool myfunc() except *:

# Always do an additional cast when returning value, even when

# variable is defined as py_bool:

# | cdef py_bool returnValue

# | return bool(returnValue)

# Otherwise compiler warnings appear:

# | cefpython.cpp(26533) : warning C4800: 'int' : forcing value

# | to bool 'true' or 'false' (performance warning)

# Lots of these warnings results in ignoring them, but sometimes

# they are shown for a good reason. For example when you forget

# to return a value in a function.

# - Always import bool from libcpp as cpp_bool, if you import it as

# "bool" in a pxd file, then Cython will complain about bool casts

# like "bool(1)" being invalid, in pyx files.

# All .pyx files need to be included in this file.

# Includes being made in other .pyx files are allowed to help

# IDE completion, but will be removed during cython compilation.

# Version file is generated by the compile.bat/compile.py script.

include "__version__.pyx"

include "cython_includes/compile_time_constants.pxi"

include "imports.pyx"

# -----------------------------------------------------------------------------

# Global variables

g_debug = False

g_debugFile = "debug.log"

# When put None here and assigned a local dictionary in Initialize(), later

# while running app this global variable was garbage collected, see topic:

# https://groups.google.com/d/topic/cython-users/0dw3UASh7HY/discussion

g_applicationSettings = {}

g_commandLineSwitches = {}

cdef dict g_globalClientCallbacks = {}

# If ApplicationSettings.unique_request_context_per_browser is False

# then a shared request context is used for all browsers. Otherwise

# a unique one is created for each call to CreateBrowserSync.

cdef CefRefPtr[CefRequestContext] g_sharedRequestContext

# -----------------------------------------------------------------------------

include "utils.pyx"

include "string_utils.pyx"

IF UNAME_SYSNAME == "Windows":

include "string_utils_win.pyx"

include "time_utils.pyx"

include "browser.pyx"

include "frame.pyx"

include "settings.pyx"

IF UNAME_SYSNAME == "Windows" and CEF_VERSION == 1:

# Off-screen rendering currently supported only on Windows

include "paint_buffer_cef1.pyx"

IF UNAME_SYSNAME == "Windows":

include "window_utils_win.pyx"

include "dpi_aware_win.pyx"

IF CEF_VERSION == 1:

include "http_authentication_win.pyx"

ELIF UNAME_SYSNAME == "Linux":

include "window_utils_linux.pyx"

ELIF UNAME_SYSNAME == "Darwin":

include "window_utils_mac.pyx"

include "task.pyx"

include "javascript_bindings.pyx"

include "virtual_keys.pyx"

IF CEF_VERSION == 1:

include "window_info_cef1.pyx"

include "cookie_cef1.pyx"

include "load_handler_cef1.pyx"

include "keyboard_handler_cef1.pyx"

include "request_cef1.pyx"

include "web_request_cef1.pyx"

include "request_handler_cef1.pyx"

include "response_cef1.pyx"

include "display_handler_cef1.pyx"

include "lifespan_handler_cef1.pyx"

IF UNAME_SYSNAME == "Windows":

# Off-screen rendering currently supported only on Windows.

include "render_handler_cef1.pyx"

include "download_handler.pyx"

include "v8context_handler_cef1.pyx"

include "v8function_handler_cef1.pyx"

include "v8utils_cef1.pyx"

include "javascript_callback_cef1.pyx"

include "python_callback_cef1.pyx"

include "network_error_cef1.pyx"

IF CEF_VERSION == 3:

include "window_info_cef3.pyx"

include "process_message_utils.pyx"

include "v8context_handler_cef3.pyx"

include "v8function_handler_cef3.pyx"

include "javascript_callback_cef3.pyx"

include "python_callback_cef3.pyx"

include "lifespan_handler_cef3.pyx"

include "display_handler_cef3.pyx"

include "keyboard_handler_cef3.pyx"

include "web_plugin_info_cef3.pyx"

include "request_cef3.pyx"

include "request_handler_cef3.pyx"

include "cookie_cef3.pyx"

include "string_visitor_cef3.pyx"

include "load_handler_cef3.pyx"

include "network_error_cef3.pyx"

include "browser_process_handler_cef3.pyx"

include "paint_buffer_cef3.pyx"

include "render_handler_cef3.pyx"

include "callback_cef3.pyx"

include "resource_handler_cef3.pyx"

include "response_cef3.pyx"

include "web_request_cef3.pyx"

include "command_line.pyx"

include "app.pyx"

include "javascript_dialog_handler.pyx"

# -----------------------------------------------------------------------------

# Utility functions to provide settings to the C++ browser process code.

cdef public void cefpython_GetDebugOptions(

cpp_bool* debug,

cpp_string* debugFile

) except * with gil:

# Called from subprocess/cefpython_app.cpp -> CefPythonApp constructor.

cdef cpp_string cppString = g_debugFile

try:

debug[0] = <cpp_bool>bool(g_debug)

debugFile.assign(cppString)

except:

(exc_type, exc_value, exc_trace) = sys.exc_info()

sys.excepthook(exc_type, exc_value, exc_trace)

cdef public cpp_bool ApplicationSettings_GetBool(const char* key

) except * with gil:

# Called from client_handler/client_handler.cpp for example

cdef py_string pyKey = CharToPyString(key)

if pyKey in g_applicationSettings:

return bool(g_applicationSettings[pyKey])

return False

cdef public cpp_bool ApplicationSettings_GetBoolFromDict(const char* key1,

const char* key2) except * with gil:

cdef py_string pyKey1 = CharToPyString(key1)

cdef py_string pyKey2 = CharToPyString(key2)

cdef object dictValue # Yet to be checked whether it is `dict`

if pyKey1 in g_applicationSettings:

dictValue = g_applicationSettings[pyKey1]

if type(dictValue) != dict:

return False

if pyKey2 in dictValue:

return bool(dictValue[pyKey2])

return False

cdef public cpp_string ApplicationSettings_GetString(const char* key

) except * with gil:

cdef py_string pyKey = CharToPyString(key)

cdef cpp_string cppString

if pyKey in g_applicationSettings:

cppString = AnyToPyString(g_applicationSettings[pyKey])

return cppString

cdef public int CommandLineSwitches_GetInt(const char* key) except * with gil:

cdef py_string pyKey = CharToPyString(key)

if pyKey in g_commandLineSwitches:

return int(g_commandLineSwitches[pyKey])

return 0

# -----------------------------------------------------------------------------

# If you've built custom binaries with tcmalloc hook enabled on

# Linux, then do not to run any of the CEF code until Initialize()

# is called. See Issue 73 in the CEF Python Issue Tracker.

def Initialize(applicationSettings=None, commandLineSwitches=None):

if not applicationSettings:

applicationSettings = {}

# Debug settings need to be set before Debug() is called

# and before the CefPythonApp class is instantiated.

global g_debug

global g_debugFile

if "debug" in applicationSettings:

g_debug = bool(applicationSettings["debug"])

if "log_file" in applicationSettings:

g_debugFile = applicationSettings["log_file"]

Debug("Initialize() called")

# Mac initialization. Need to call NSApplication.sharedApplication()

# and do NSApplication methods swizzling to implement

# CrAppControlProtocol. See Issue 156.

IF UNAME_SYSNAME == "Darwin":

MacInitialize()

# -------------------------------------------------------------------------

# CEF Python only options - default values

if "debug" not in applicationSettings:

applicationSettings["debug"] = False

if "string_encoding" not in applicationSettings:

applicationSettings["string_encoding"] = "utf-8"

if "unique_request_context_per_browser" not in applicationSettings:

applicationSettings["unique_request_context_per_browser"] = False

if "downloads_enabled" not in applicationSettings:

applicationSettings["downloads_enabled"] = True

if "remote_debugging_port" not in applicationSettings:

applicationSettings["remote_debugging_port"] = 0

if "auto_zooming" not in applicationSettings:

IF UNAME_SYSNAME == "Windows":

if DpiAware.IsProcessDpiAware():

applicationSettings["auto_zooming"] = "system_dpi"

# Mouse context menu

if "context_menu" not in applicationSettings:

applicationSettings["context_menu"] = {}

menuItems = ["enabled", "navigation", "print", "view_source",\

"external_browser", "devtools"]

for item in menuItems:

if item not in applicationSettings["context_menu"]:

applicationSettings["context_menu"][item] = True

# Remote debugging port. If value is 0 we will generate a random

# port. To disable remote debugging set value to -1.

if applicationSettings["remote_debugging_port"] == 0:

# Generate a random port.

applicationSettings["remote_debugging_port"] =\

random.randint(49152, 65535)

elif applicationSettings["remote_debugging_port"] == -1:

# Disable remote debugging

applicationSettings["remote_debugging_port"] = 0

# -------------------------------------------------------------------------

# CEF options - default values.

if not "multi_threaded_message_loop" in applicationSettings:

applicationSettings["multi_threaded_message_loop"] = False

IF CEF_VERSION == 3:

if not "single_process" in applicationSettings:

applicationSettings["single_process"] = False

cdef CefRefPtr[CefApp] cefApp

IF CEF_VERSION == 3:

cefApp = <CefRefPtr[CefApp]?>new CefPythonApp()

IF UNAME_SYSNAME == "Windows":

cdef HINSTANCE hInstance = GetModuleHandle(NULL)

cdef CefMainArgs cefMainArgs = CefMainArgs(hInstance)

ELIF UNAME_SYSNAME == "Linux":

# TODO: use the CefMainArgs(int argc, char** argv) constructor.

cdef CefMainArgs cefMainArgs

ELIF UNAME_SYSNAME == "Darwin":

# TODO: use the CefMainArgs(int argc, char** argv) constructor.

cdef CefMainArgs cefMainArgs

cdef int exitCode = 1

with nogil:

exitCode = CefExecuteProcess(cefMainArgs, cefApp)

Debug("CefExecuteProcess(): exitCode = %s" % exitCode)

if exitCode >= 0:

sys.exit(exitCode)

# Make a copy as applicationSettings is a reference only

# that might get destroyed later.

global g_applicationSettings

for key in applicationSettings:

g_applicationSettings[key] = copy.deepcopy(applicationSettings[key])

cdef CefSettings cefApplicationSettings

SetApplicationSettings(applicationSettings, &cefApplicationSettings)

if commandLineSwitches:

# Make a copy as commandLineSwitches is a reference only

# that might get destroyed later.

global g_commandLineSwitches

for key in commandLineSwitches:

g_commandLineSwitches[key] = copy.deepcopy(

commandLineSwitches[key])

Debug("CefInitialize()")

cdef cpp_bool ret

IF CEF_VERSION == 1:

with nogil:

ret = CefInitialize(cefApplicationSettings, cefApp)

ELIF CEF_VERSION == 3:

with nogil:

ret = CefInitialize(cefMainArgs, cefApplicationSettings, cefApp)

if not ret:

Debug("CefInitialize() failed")

return ret

def CreateBrowserSync(windowInfo, browserSettings, navigateUrl, requestContext=None):

Debug("CreateBrowserSync() called")

assert IsThread(TID_UI), (

"cefpython.CreateBrowserSync() may only be called on the UI thread")

if not isinstance(windowInfo, WindowInfo):

raise Exception("CreateBrowserSync() failed: windowInfo: invalid object")

cdef CefBrowserSettings cefBrowserSettings

SetBrowserSettings(browserSettings, &cefBrowserSettings)

cdef CefWindowInfo cefWindowInfo

SetCefWindowInfo(cefWindowInfo, windowInfo)

navigateUrl = GetNavigateUrl(navigateUrl)

Debug("navigateUrl: %s" % navigateUrl)

cdef CefString cefNavigateUrl

PyToCefString(navigateUrl, cefNavigateUrl)

Debug("CefBrowser::CreateBrowserSync()")

cdef CefRefPtr[ClientHandler] clientHandler =\

<CefRefPtr[ClientHandler]?>new ClientHandler()

cdef CefRefPtr[CefBrowser] cefBrowser

# Request context - part 1/2.

createSharedRequestContext = bool(not g_sharedRequestContext.get())

cdef CefRefPtr[CefRequestContext] cefRequestContext

cdef CefRefPtr[RequestContextHandler] requestContextHandler =\

<CefRefPtr[RequestContextHandler]?>new RequestContextHandler(\

cefBrowser)

if g_applicationSettings["unique_request_context_per_browser"]:

cefRequestContext = CefRequestContext_CreateContext(\

<CefRefPtr[CefRequestContextHandler]?>requestContextHandler)

else:

if createSharedRequestContext:

cefRequestContext = CefRequestContext_CreateContext(\

<CefRefPtr[CefRequestContextHandler]?>\

requestContextHandler)

g_sharedRequestContext.Assign(cefRequestContext.get())

else:

cefRequestContext.Assign(g_sharedRequestContext.get())

# CEF browser creation.

with nogil:

cefBrowser = cef_browser_static.CreateBrowserSync(

cefWindowInfo, <CefRefPtr[CefClient]?>clientHandler,

cefNavigateUrl, cefBrowserSettings,

cefRequestContext)

if <void*>cefBrowser == NULL or not cefBrowser.get():

Debug("CefBrowser::CreateBrowserSync() failed")

return None

else:

Debug("CefBrowser::CreateBrowserSync() succeeded")

# Request context - part 2/2.

if g_applicationSettings["unique_request_context_per_browser"]:

requestContextHandler.get().SetBrowser(cefBrowser)

else:

if createSharedRequestContext:

requestContextHandler.get().SetBrowser(cefBrowser)

cdef PyBrowser pyBrowser = GetPyBrowser(cefBrowser)

pyBrowser.SetUserData("__outerWindowHandle", int(windowInfo.parentWindowHandle))

# IF CEF_VERSION == 3:

# Test whether process message sent before renderer thread is created

# will be delivered - OK.

# Debug("Sending 'CreateBrowserSync() done' message to the Renderer")

# pyBrowser.SendProcessMessage(cef_types.PID_RENDERER,

# "CreateBrowserSync() done")

return pyBrowser

def MessageLoop():

Debug("MessageLoop()")

with nogil:

CefRunMessageLoop()

def MessageLoopWork():

# Perform a single iteration of CEF message loop processing.

# This function is used to integrate the CEF message loop

# into an existing application message loop.

# Anything that can block for a significant amount of time

# and is thread-safe should release the GIL:

# https://groups.google.com/d/msg/cython-users/jcvjpSOZPp0/KHpUEX8IhnAJ

# GIL must be released here otherwise we will get dead lock

# when calling from c++ to python.

with nogil:

CefDoMessageLoopWork();

def SingleMessageLoop():

# @deprecated, use MessageLoopWork() instead

MessageLoopWork()

def QuitMessageLoop():

Debug("QuitMessageLoop()")

with nogil:

CefQuitMessageLoop()

def Shutdown():

if g_sharedRequestContext.get():

# A similar release is done in RemovePyBrowser and CloseBrowser.

# This one is probably redundant. Additional testing should be done.

Debug("Shutdown: releasing shared request context")

g_sharedRequestContext.Assign(NULL)

Debug("Shutdown()")

with nogil:

CefShutdown()

def SetOsModalLoop(py_bool modalLoop):

cdef cpp_bool cefModalLoop = bool(modalLoop)

with nogil:

CefSetOSModalLoop(cefModalLoop)

cpdef py_void SetGlobalClientCallback(py_string name, object callback):

global g_globalClientCallbacks

if name in ["OnCertificateError", "OnBeforePluginLoad", "OnAfterCreated"]:

g_globalClientCallbacks[name] = callback

else:

raise Exception("SetGlobalClientCallback() failed: " \

"invalid callback name = %s" % name)

cpdef object GetGlobalClientCallback(py_string name):

global g_globalClientCallbacks

if name in g_globalClientCallbacks:

return g_globalClientCallbacks[name]

else:

return None

cefpython/cefpython/cefpython.pyx at master · MrEricSir/cefpython · GitHub

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