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Added TCEFSentinel to more demos

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- Check that all frames are valid before using them
- Added an error page to MiniBrowser.
This commit is contained in:
Salvador Díaz Fau
2019-10-13 18:50:23 +02:00
parent 9391d68ee0
commit 77121dc510
89 changed files with 1097 additions and 522 deletions
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5
demos/Delphi_VCL/JavaScript/JSRTTIExtension/uJSRTTIExtension.dfm
View File

@@ -89,4 +89,9 @@ object JSRTTIExtensionFrm: TJSRTTIExtensionFrm
Left = 32
Top = 288
end
object CEFSentinel1: TCEFSentinel
OnClose = CEFSentinel1Close
Left = 32
Top = 352
end
end

24
demos/Delphi_VCL/JavaScript/JSRTTIExtension/uJSRTTIExtension.pas
View File

@@ -50,7 +50,7 @@ uses
Controls, Forms, Dialogs, StdCtrls, ExtCtrls, ComCtrls,
{$ENDIF}
uCEFChromium, uCEFWindowParent, uCEFInterfaces, uCEFApplication, uCEFTypes, uCEFConstants,
uCEFWinControl;
uCEFWinControl, uCEFSentinel;
const
MINIBROWSER_SHOWTEXTVIEWER = WM_APP + $100;
@@ -72,6 +72,7 @@ type
CEFWindowParent1: TCEFWindowParent;
Chromium1: TChromium;
Timer1: TTimer;
CEFSentinel1: TCEFSentinel;
procedure FormShow(Sender: TObject);
procedure GoBtnClick(Sender: TObject);
procedure Chromium1BeforeContextMenu(Sender: TObject;
@@ -100,6 +101,7 @@ type
var aAction : TCefCloseBrowserAction);
procedure Chromium1BeforeClose(Sender: TObject;
const browser: ICefBrowser);
procedure CEFSentinel1Close(Sender: TObject);
protected
FText : string;
// Variables to control when can we destroy the form safely
@@ -155,7 +157,8 @@ uses
// =================
// 1. FormCloseQuery sets CanClose to FALSE calls TChromium.CloseBrowser which triggers the TChromium.OnClose event.
// 2. TChromium.OnClose sends a CEFBROWSER_DESTROY message to destroy CEFWindowParent1 in the main thread, which triggers the TChromium.OnBeforeClose event.
// 3. TChromium.OnBeforeClose sets FCanClose := True and sends WM_CLOSE to the form.
// 3. TChromium.OnBeforeClose calls TCEFSentinel.Start, which will trigger TCEFSentinel.OnClose when the renderer processes are closed.
// 4. TCEFSentinel.OnClose sets FCanClose := True and sends WM_CLOSE to the form.
procedure GlobalCEFApp_OnWebKitInitialized;
begin
@@ -184,6 +187,12 @@ begin
Chromium1.LoadURL(Edit1.Text);
end;
procedure TJSRTTIExtensionFrm.CEFSentinel1Close(Sender: TObject);
begin
FCanClose := True;
PostMessage(Handle, WM_CLOSE, 0, 0);
end;
procedure TJSRTTIExtensionFrm.Chromium1AfterCreated(Sender: TObject; const browser: ICefBrowser);
begin
PostMessage(Handle, CEF_AFTERCREATED, 0, 0);
@@ -228,7 +237,7 @@ begin
// Here is the code executed for each custom context menu entry
case commandId of
MINIBROWSER_CONTEXTMENU_SETJSEVENT :
if (browser <> nil) and (browser.MainFrame <> nil) then
if (frame <> nil) and frame.IsValid then
begin
TempJSCode := 'document.body.addEventListener("mouseover", function(evt){'+
'function getpath(n){'+
@@ -239,17 +248,17 @@ begin
'myextension.mouseover(getpath(evt.target))}'+ // This is the call from JavaScript to the extension with DELPHI code in uTestExtension.pas
')';
browser.MainFrame.ExecuteJavaScript(TempJSCode, 'about:blank', 0);
frame.ExecuteJavaScript(TempJSCode, 'about:blank', 0);
end;
MINIBROWSER_CONTEXTMENU_JSVISITDOM :
if (browser <> nil) and (browser.MainFrame <> nil) then
if (frame <> nil) and frame.IsValid then
begin
// This is the call from JavaScript to the extension with DELPHI code in uTestExtension.pas
TempJSCode := 'var testhtml = document.body.innerHTML; ' +
'myextension.sendresulttobrowser(testhtml, ' + quotedstr(CUSTOMNAME_MESSAGE_NAME) + ');';
browser.MainFrame.ExecuteJavaScript(TempJSCode, 'about:blank', 0);
frame.ExecuteJavaScript(TempJSCode, 'about:blank', 0);
end;
MINIBROWSER_CONTEXTMENU_SHOWDEVTOOLS :
@@ -342,8 +351,7 @@ end;
procedure TJSRTTIExtensionFrm.Chromium1BeforeClose(
Sender: TObject; const browser: ICefBrowser);
begin
FCanClose := True;
PostMessage(Handle, WM_CLOSE, 0, 0);
CEFSentinel1.Start;
end;
procedure TJSRTTIExtensionFrm.Chromium1Close(

37
demos/Delphi_VCL/JavaScript/JSRTTIExtension/uTestExtension.pas
View File

@@ -63,24 +63,41 @@ uses
class procedure TTestExtension.mouseover(const data: string);
var
msg: ICefProcessMessage;
TempMessage : ICefProcessMessage;
TempFrame : ICefFrame;
begin
msg := TCefProcessMessageRef.New(MOUSEOVER_MESSAGE_NAME);
msg.ArgumentList.SetString(0, data);
try
TempMessage := TCefProcessMessageRef.New(MOUSEOVER_MESSAGE_NAME);
TempMessage.ArgumentList.SetString(0, data);
// Sending a message back to the browser. It'll be received in the TChromium.OnProcessMessageReceived event.
// TCefv8ContextRef.Current returns the v8 context for the frame that is currently executing Javascript.
TCefv8ContextRef.Current.Browser.MainFrame.SendProcessMessage(PID_BROWSER, msg);
// Sending a message back to the browser. It'll be received in the TChromium.OnProcessMessageReceived event.
// TCefv8ContextRef.Current returns the v8 context for the frame that is currently executing Javascript.
TempFrame := TCefv8ContextRef.Current.Browser.MainFrame;
if (TempFrame <> nil) and TempFrame.IsValid then
TempFrame.SendProcessMessage(PID_BROWSER, TempMessage);
finally
TempMessage := nil;
end;
end;
class procedure TTestExtension.sendresulttobrowser(const msgtext, msgname : string);
var
msg: ICefProcessMessage;
TempMessage : ICefProcessMessage;
TempFrame : ICefFrame;
begin
msg := TCefProcessMessageRef.New(msgname);
msg.ArgumentList.SetString(0, msgtext);
try
TempMessage := TCefProcessMessageRef.New(msgname);
TempMessage.ArgumentList.SetString(0, msgtext);
TCefv8ContextRef.Current.Browser.MainFrame.SendProcessMessage(PID_BROWSER, msg);
TempFrame := TCefv8ContextRef.Current.Browser.MainFrame;
if (TempFrame <> nil) and TempFrame.IsValid then
TempFrame.SendProcessMessage(PID_BROWSER, TempMessage);
finally
TempMessage := nil;
end;
end;
end.