public ChromiumFxDispatcher(CfrBrowser browser, CfrV8Context context, IWebSessionLogger logger)
{
_Logger = logger;
_Browser = browser;
_Context = context;
TaskRunner = _Context.TaskRunner;
_CfrTask = new CfrTask();
_CfrTask.Execute += CfrTask_Execute;
}
/// <summary>
/// Post a task for execution on the specified thread. Equivalent to using
/// CfrTaskRunner.GetForThread(threadId).PostTask(task).
/// </summary>
/// <remarks>
/// See also the original CEF documentation in
/// <see href="https://bitbucket.org/chromiumfx/chromiumfx/src/tip/cef/include/capi/cef_task_capi.h">cef/include/capi/cef_task_capi.h</see>.
/// </remarks>
public static bool PostTask(CfxThreadId threadId, CfrTask task)
{
var call = new CfxRuntimePostTaskRenderProcessCall();
call.threadId = (int)threadId;
call.task = CfrObject.Unwrap(task);
call.RequestExecution(CfxRemoteCallContext.CurrentContext.connection);
return(call.__retval);
}
/// <summary>
/// Post a task for delayed execution on the specified thread. Equivalent to
/// using CfrTaskRunner.GetForThread(threadId).PostDelayedTask(task,
/// delay_ms).
/// </summary>
/// <remarks>
/// See also the original CEF documentation in
/// <see href="https://bitbucket.org/chromiumfx/chromiumfx/src/tip/cef/include/capi/cef_task_capi.h">cef/include/capi/cef_task_capi.h</see>.
/// </remarks>
public static bool PostDelayedTask(CfxThreadId threadId, CfrTask task, long delayMs)
{
var call = new CfxRuntimePostDelayedTaskRenderProcessCall();
call.threadId = (int)threadId;
call.task = CfrObject.Unwrap(task);
call.delayMs = delayMs;
call.RequestExecution(CfxRemoteCallContext.CurrentContext.connection);
return call.__retval;
}
public ChromiumFxTask(Action perform)
{
var task = new CfrTask();
task.Execute += (sender, args) =>
{
perform();
Clean?.Invoke();
};
Task = task;
}
public ChromiumFxTask(Action perform)
{
var task = new CfrTask();
task.Execute += (sender, args) =>
{
perform();
Clean?.Invoke();
};
Task = task;
}
public ChromiumFxTask(Action perform)
{
Task = new CfrTask();
Task.Execute += (sender, args) =>
{
perform();
Clean?.Invoke();
Task.Dispose();
Task = null;
};
}
private CfrTask AddTask(Action action)
{
var task = new CfrTask();
task.Execute += (o, e) =>
{
action();
RemoveTask(task);
};
lock (_Locker)
_Tasks.Add(task);
return(task);
}
protected void CallCallback(CfrV8Value callback, CfrV8Context v8Context, params KeyValuePair <string, object>[] par)
{
if (callback != null)
{
//get render process context
var rc = callback.CreateRemoteCallContext();
//enter render process
rc.Enter();
//create render task
var task = new CfrTask();
task.Execute += (_, taskArgs) =>
{
//enter saved context
v8Context.Enter();
var callbackArgs = CfrV8Value.CreateObject(new CfrV8Accessor());
foreach (var val in par)
{
var validValue = ConvertValue(val.Value);
callbackArgs.SetValue(val.Key, validValue, CfxV8PropertyAttribute.ReadOnly);
}
//execute callback
callback.ExecuteFunction(null, new CfrV8Value[] { callbackArgs });
v8Context.Exit();
//lock task from gc
lock (task)
{
Monitor.PulseAll(task);
}
};
lock (task)
{
//post task to render process
v8Context.TaskRunner.PostTask(task);
}
rc.Exit();
GC.KeepAlive(task);
}
}
void CfrTaskStressTest()
{
if (remoteBrowser == null)
{
return;
}
var ctx = remoteBrowser.CreateRemoteCallContext();
ctx.Enter();
try {
int taskExecutionCounter = 0;
for (int i = 0; i < 10000; ++i)
{
var task = new CfrTask();
task.Execute += (s, e1) => {
++taskExecutionCounter;
if (taskExecutionCounter % 1000 == 0)
{
LogWriteLine($"CfrTask stress test: {taskExecutionCounter}/10000 tasks executed.");
}
};
if (i % 2 == 0)
{
CfrRuntime.PostTask(CfxThreadId.Renderer, task);
}
else
{
var tr = CfrTaskRunner.GetForThread(CfxThreadId.Renderer);
tr.PostTask(task);
}
if (i % 1000 == 0)
{
LogWriteLine($"CfrTask stress test: {i}/10000 tasks posted.");
}
}
} catch {
LogWriteLine($"CfrTask stress test: Exception cought, aborting.");
} finally {
ctx.Exit();
}
}
private void AsyncTestFunctionCallback(CfrV8Value function, CfrV8Context v8Context)
{
LogWriteLine("AsyncTestFunctionCallback: sleep 2 secs, don't browse away...");
Thread.Sleep(2000);
var rpcContext = function.CreateRemoteCallContext();
rpcContext.Enter();
// since v8 values can only be accessed from the thread on which they are created, the task
// has to be posted for execution on the remote renderer thread (see CfxV8Value summary)
var task = new CfrTask();
string result = null;
task.Execute += (s, e) => {
v8Context.Enter();
LogWriteLine("AsyncTestFunctionCallback -> task.Execute: function.FunctionName = " + function.FunctionName);
var args = new CfrV8Value[] { "This is the alert text." };
var retval = function.ExecuteFunction(null, args);
result = retval.StringValue;
v8Context.Exit();
// release the waiting thread.
lock (task) {
Monitor.PulseAll(task);
}
};
// wait until the return value is available.
lock (task) {
CfrTaskRunner.GetForThread(CfxThreadId.Renderer).PostTask(task);
Monitor.Wait(task);
}
rpcContext.Exit();
LogWriteLine("AsyncTestFunctionCallback: result from callback = " + result);
LogWriteLine("AsyncTestFunctionCallback: done.");
}
private void RunInContextUnsafe(Action action)
{
if (CfxRemoteCallContext.IsInContext)
{
action();
return;
}
_Actions.Enqueue(action);
if (_IsExecutingActions)
{
return;
}
using (GetRemoteContext())
{
var task = new CfrTask();
task.Execute += CfrTask_Execute;
CfrRuntime.PostTask(CfxThreadId.Renderer, task);
}
}
public Form1()
: base("http://res.app.local/www/index.html")
{
InitializeComponent();
LoadHandler.OnLoadEnd += LoadHandler_OnLoadEnd;
//register the "my" object
var myObject = GlobalObject.AddObject("my");
//add property "name" to my, you should implemnt the getter/setter of name property by using PropertyGet/PropertySet events.
var nameProp = myObject.AddDynamicProperty("name");
nameProp.PropertyGet += (prop, args) =>
{
// getter - if js code "my.name" executes, it'll get the string "NanUI".
args.Retval = CfrV8Value.CreateString("NanUI");
args.SetReturnValue(true);
};
nameProp.PropertySet += (prop, args) =>
{
// setter's value from js context, here we do nothing, so it will store or igrone by your mind.
var value = args.Value;
args.SetReturnValue(true);
};
//add a function showCSharpMessageBox
var showMessageBoxFunc = myObject.AddFunction("showCSharpMessageBox");
showMessageBoxFunc.Execute += (func, args) =>
{
//it will be raised by js code "my.showCSharpMessageBox(`some text`)" executed.
//get the first string argument in Arguments, it pass by js function.
var stringArgument = args.Arguments.FirstOrDefault(p => p.IsString);
if (stringArgument != null)
{
MessageBox.Show(this, stringArgument.StringValue, "C# Messagebox", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
};
//add a function getArrayFromCSharp, this function has an argument, it will combind C# string array with js array and return to js context.
var friends = new string[] { "Mr.JSON", "Mr.Lee", "Mr.BONG" };
var getArrayFromCSFunc = myObject.AddFunction("getArrayFromCSharp");
getArrayFromCSFunc.Execute += (func, args) =>
{
var jsArray = args.Arguments.FirstOrDefault(p => p.IsArray);
if (jsArray == null)
{
jsArray = CfrV8Value.CreateArray(friends.Length);
for (int i = 0; i < friends.Length; i++)
{
jsArray.SetValue(i, CfrV8Value.CreateString(friends[i]));
}
}
else
{
var newArray = CfrV8Value.CreateArray(jsArray.ArrayLength + friends.Length);
for (int i = 0; i < jsArray.ArrayLength; i++)
{
newArray.SetValue(i, jsArray.GetValue(i));
}
var jsArrayLength = jsArray.ArrayLength;
for (int i = 0; i < friends.Length; i++)
{
newArray.SetValue(i + jsArrayLength, CfrV8Value.CreateString(friends[i]));
}
jsArray = newArray;
}
//return the array to js context
args.SetReturnValue(jsArray);
//in js context, use code "my.getArrayFromCSharp()" will get an array like ["Mr.JSON", "Mr.Lee", "Mr.BONG"]
};
//add a function getObjectFromCSharp, this function has no arguments, but it will return a Object to js context.
var getObjectFormCSFunc = myObject.AddFunction("getObjectFromCSharp");
getObjectFormCSFunc.Execute += (func, args) =>
{
//create the CfrV8Value object and the accssor of this Object.
var jsObjectAccessor = new CfrV8Accessor();
var jsObject = CfrV8Value.CreateObject(jsObjectAccessor);
//create a CfrV8Value array
var jsArray = CfrV8Value.CreateArray(friends.Length);
for (int i = 0; i < friends.Length; i++)
{
jsArray.SetValue(i, CfrV8Value.CreateString(friends[i]));
}
jsObject.SetValue("libName", CfrV8Value.CreateString("NanUI"), CfxV8PropertyAttribute.ReadOnly);
jsObject.SetValue("friends", jsArray, CfxV8PropertyAttribute.DontDelete);
args.SetReturnValue(jsObject);
//in js context, use code "my.getObjectFromCSharp()" will get an object like { friends:["Mr.JSON", "Mr.Lee", "Mr.BONG"], libName:"NanUI" }
};
//add a function with callback
var callbackTestFunc = GlobalObject.AddFunction("callbackTest");
callbackTestFunc.Execute += (func, args) => {
var callback = args.Arguments.FirstOrDefault(p => p.IsFunction);
if (callback != null)
{
var callbackArgs = CfrV8Value.CreateObject(new CfrV8Accessor());
callbackArgs.SetValue("success", CfrV8Value.CreateBool(true), CfxV8PropertyAttribute.ReadOnly);
callbackArgs.SetValue("text", CfrV8Value.CreateString("Message from C#"), CfxV8PropertyAttribute.ReadOnly);
callback.ExecuteFunction(null, new CfrV8Value[] { callbackArgs });
}
};
//add a function with async callback
var asyncCallbackTestFunc = GlobalObject.AddFunction("asyncCallbackTest");
asyncCallbackTestFunc.Execute += async(func, args) => {
//save current context
var v8Context = CfrV8Context.GetCurrentContext();
var callback = args.Arguments.FirstOrDefault(p => p.IsFunction);
//simulate async methods.
await Task.Delay(5000);
if (callback != null)
{
//get render process context
var rc = callback.CreateRemoteCallContext();
//enter render process
rc.Enter();
//create render task
var task = new CfrTask();
task.Execute += (_, taskArgs) =>
{
//enter saved context
v8Context.Enter();
//create callback argument
var callbackArgs = CfrV8Value.CreateObject(new CfrV8Accessor());
callbackArgs.SetValue("success", CfrV8Value.CreateBool(true), CfxV8PropertyAttribute.ReadOnly);
callbackArgs.SetValue("text", CfrV8Value.CreateString("Message from C#"), CfxV8PropertyAttribute.ReadOnly);
//execute callback
callback.ExecuteFunction(null, new CfrV8Value[] { callbackArgs });
v8Context.Exit();
//lock task from gc
lock (task)
{
Monitor.PulseAll(task);
}
};
lock (task)
{
//post task to render process
v8Context.TaskRunner.PostTask(task);
}
rc.Exit();
GC.KeepAlive(task);
}
};
}
private void RemoveTask(CfrTask task)
{
task.Dispose();
lock (_Locker)
_Tasks.Remove(task);
}
