Merge pull request #299 from adobe/bchin/open-with-brackets-from-windows-explorer-no-msi

Implement Windows Explorer "Open with..." option (no .msi)

Author: JeffryBooher

appshell/cefclient_win.cpp

@@ -35,6 +35,9 @@
 
 #define CLOSING_PROP L"CLOSING"
 
+#define FIRST_INSTANCE_MUTEX_NAME	(APP_NAME L".Shell.Instance")
+#define ID_WM_COPYDATA_SENDOPENFILECOMMAND	(WM_USER+1001)
+
 // Global Variables:
 DWORD g_appStartupTime;
 HINSTANCE hInst;   // current instance
@@ -142,6 +145,32 @@ std::wstring GetFilenamesFromCommandLine() {
     return result;
 }
 
+// EnumWindowsProc callback function
+//  - searches for an already running Brackets application window
+BOOL CALLBACK FindSuitableBracketsInstance(HWND hwnd, LPARAM lParam)
+{
+	ASSERT(lParam != NULL);	// must be passed an HWND pointer to return, if found
+
+	// check for the Brackets application window by class name and title
+	WCHAR cName[MAX_PATH+1] = {0}, cTitle[MAX_PATH+1] = {0};
+	::GetClassName(hwnd, cName, MAX_PATH);
+	::GetWindowText(hwnd, cTitle, MAX_PATH);
+	if ((wcscmp(cName, szWindowClass) == 0) && (wcsstr(cTitle, APP_NAME) != 0)) {
+		// found an already running instance of Brackets.  Now, check that that window
+		//   isn't currently disabled (eg. modal dialog).  If it is keep searching.
+		if ((::GetWindowLong(hwnd, GWL_STYLE) & WS_DISABLED) == 0) {
+			//return the window handle and stop searching
+			*(HWND*)lParam = hwnd;
+			return FALSE;
+		}
+	}
+
+	return TRUE;	// otherwise, continue searching
+}
+
+// forward declaration; implemented in appshell_extensions_win.cpp
+void ConvertToUnixPath(ExtensionString& filename);
+
 // Program entry point function.
 int APIENTRY wWinMain(HINSTANCE hInstance,
                      HINSTANCE hPrevInstance,
@@ -167,6 +196,43 @@ int APIENTRY wWinMain(HINSTANCE hInstance,
   // Parse command line arguments. The passed in values are ignored on Windows.
   AppInitCommandLine(0, NULL);
 
+  // Initialize global strings
+  LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
+  LoadString(hInstance, IDC_CEFCLIENT, szWindowClass, MAX_LOADSTRING);
+
+  // Determine if we should use an already running instance of Brackets.
+  HANDLE hMutex = ::OpenMutex(MUTEX_ALL_ACCESS, FALSE, FIRST_INSTANCE_MUTEX_NAME);
+  if ((hMutex != NULL) && AppGetCommandLine()->HasArguments() && (lpCmdLine != NULL)) {
+	  // for subsequent instances, re-use an already running instance if we're being called to
+	  //   open an existing file on the command-line (eg. Open With.. from Windows Explorer)
+	  HWND hFirstInstanceWnd = NULL;
+	  ::EnumWindows(FindSuitableBracketsInstance, (LPARAM)&hFirstInstanceWnd);
+	  if (hFirstInstanceWnd != NULL) {
+		  ::SetForegroundWindow(hFirstInstanceWnd);
+		  if (::IsIconic(hFirstInstanceWnd))
+			  ::ShowWindow(hFirstInstanceWnd, SW_RESTORE);
+		  
+		  // message the other Brackets instance to actually open the given filename
+		  std::wstring wstrFilename = lpCmdLine;
+		  ConvertToUnixPath(wstrFilename);
+		  // note: WM_COPYDATA will manage passing the string across process space
+		  COPYDATASTRUCT data;
+		  data.dwData = ID_WM_COPYDATA_SENDOPENFILECOMMAND;
+		  data.cbData = (wstrFilename.length() + 1) * sizeof(WCHAR);
+		  data.lpData = (LPVOID)wstrFilename.c_str();
+		  ::SendMessage(hFirstInstanceWnd, WM_COPYDATA, (WPARAM)(HWND)hFirstInstanceWnd, (LPARAM)(LPVOID)&data);
+
+		  // exit this instance
+		  return 0;
+	  }
+	  // otherwise, fall thru and launch a new instance
+  }
+
+  if (hMutex == NULL) {
+	  // first instance of this app, so create the mutex and continue execution of this instance.
+	  hMutex = ::CreateMutex(NULL, FALSE, FIRST_INSTANCE_MUTEX_NAME);
+  }
+
   CefSettings settings;
 
   // Populate the settings based on command line arguments.
@@ -180,9 +246,7 @@ int APIENTRY wWinMain(HINSTANCE hInstance,
   // Initialize CEF.
   CefInitialize(main_args, settings, app.get());
 
-  // Initialize global strings
-  LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
-  LoadString(hInstance, IDC_CEFCLIENT, szWindowClass, MAX_LOADSTRING);
+  // Register window class
   MyRegisterClass(hInstance, *(app->GetCurrentLanguage().GetStruct()));
 
   CefRefPtr<CefCommandLine> cmdLine = AppGetCommandLine();
@@ -272,6 +336,10 @@ int APIENTRY wWinMain(HINSTANCE hInstance,
   // Shut down CEF.
   CefShutdown();
 
+  // release the first instance mutex
+  if (hMutex != NULL)
+	  ReleaseMutex(hMutex);
+
   return result;
 }
 
@@ -867,6 +935,25 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam,
       PostQuitMessage(0);
       return 0;
 
+	case WM_COPYDATA:
+		// handle the interprocess communication request from another Brackets running instance
+		if (lParam != NULL) {
+			PCOPYDATASTRUCT data = (PCOPYDATASTRUCT)lParam;
+			if ((data->dwData == ID_WM_COPYDATA_SENDOPENFILECOMMAND) && (data->cbData > 0)) {
+				// another Brackets instance requests that we open the given filename
+				std::wstring wstrFilename = (LPCWSTR)data->lpData;
+				// Windows Explorer might enclose the filename in double-quotes.  We need to strip these off.
+				if ((wstrFilename.front() == '\"') && wstrFilename.back() == '\"')
+					wstrFilename = wstrFilename.substr(1, wstrFilename.length() - 2);
+				ASSERT(g_handler != NULL);
+				CefRefPtr<CefBrowser> browser = g_handler->GetBrowser();
+				// call into Javascript code to handle the open file command
+				ASSERT(browser != NULL);
+				g_handler->SendOpenFileCommand(browser, CefString(wstrFilename.c_str()));
+			}
+		}
+		break;
+
     case WM_INITMENUPOPUP:
         // Notify before popping up
         g_handler->SendJSCommand(g_handler->GetBrowser(), APP_BEFORE_MENUPOPUP);

installer/win/Brackets.wxs

@@ -42,6 +42,29 @@ xmlns:fire="http://schemas.microsoft.com/wix/FirewallExtension">
       </Component>
     </DirectoryRef>
 
+    <Component Id="FileAssociations" Guid="{D0195E8D-0881-42B6-9B4F-DA84D9396506}" Directory="INSTALLDIR" KeyPath="yes">
+        <!-- Capabilities keys for Vista/7 "Set Program Access and Defaults" -->
+        <RegistryValue Root="HKLM" Key="SOFTWARE\$(var.RegistryRoot)\Capabilities" Name="ApplicationIcon" Value="[INSTALLDIR]$(var.ExeName).exe,0" Type="string" />
+        <RegistryValue Root="HKLM" Key="SOFTWARE\$(var.RegistryRoot)\Capabilities" Name="ApplicationName" Value="!(loc.ProductName) $(var.ProductVersionName)" Type="string" />
+        <RegistryValue Root="HKLM" Key="SOFTWARE\RegisteredApplications" Name="!(loc.ProductName) $(var.ProductVersionName)" Value="SOFTWARE\$(var.RegistryRoot)\Capabilities" Type="string" />
+
+        <!-- File associations -->
+        <?define SupportedFiletypes=txt;groovy;ini;properties;css;scss;html;htm;shtm;shtml;xhtml;cfm;cfm1;cfc;dhtml;xht;tpl;twig;hbs;handlebars;kit;jsp;aspx;ejs;js;jsx;json;svg;xml;wxs;wxl;wsdl;rss;atom;rdf;xslt;xul;xbl;mathml;config;php;php3;php4;php5;phtm;phtml;ctp;c;h;i;cc;cp;cpp;c++;cxx;hh;hpp;hxx;h++;ii;cs;cshtml;asax;ashx;java;scala;sbt;coffee;cson;cf;clj;pl;pm;rb;ru;gemspec;rake;py;pyw;wsgi;sass;less;lua;sql;diff;patch;md;markdown;yaml;yml;hx;sh?>
+
+        <?foreach filetype in $(var.SupportedFiletypes)?>
+        <!-- associate program with file type -->
+        <RegistryValue Root="HKLM" Key="SOFTWARE\$(var.RegistryRoot)\Capabilities\FileAssociations" Value="!(loc.ProductName) $(var.ProductVersionName) FileExt" Name=".$(var.filetype)" Type="string" />
+
+        <!-- associate each supported filetype with application -->
+        <RegistryValue Root="HKCR" Key=".$(var.filetype)" Value="text" Name="PerceivedType" Type="string" />
+        <RegistryValue Root="HKCR" Key=".$(var.filetype)\OpenWithProgids" Value="" Name="!(loc.ProductName) $(var.ProductVersionName) FileExt" Type="string" />
+        <?endforeach?>
+
+        <!-- create ProgId entry -->
+        <RegistryValue Root="HKLM" Key="SOFTWARE\Classes\!(loc.ProductName) $(var.ProductVersionName) FileExt\shell\open\command" Value="&quot;[INSTALLDIR]$(var.ExeName).exe&quot; &quot;%1&quot;" Type="string" />
+        <RegistryValue Root="HKLM" Key="SOFTWARE\Classes\Applications\$(var.ExeName).exe\shell\open" Name="FriendlyAppName" Value="!(loc.ProductName) $(var.ProductVersionName)" Type="string" />
+
+    </Component>
     <!-- Start Menu Shortcuts-->
     <UIRef Id="WixUI_MyInstallDir" />
     <UIRef Id="WixUI_ErrorProgressText" />
@@ -78,6 +101,8 @@ xmlns:fire="http://schemas.microsoft.com/wix/FirewallExtension">
       <ComponentGroupRef Id='BRACKETSHARVESTMANAGER'/>
 
       <ComponentRef  Id='StartMenuShortcut' />
+
+      <ComponentRef  Id='FileAssociations' />
     </Feature>                  
   </Product>
 </Wix>

installer/win/brackets-win-install-build.xml

@@ -16,7 +16,7 @@ default="build.mul">
   <property name="product.version.number" value="0.${product.sprint.number}"/>
   <property name="product.version.name" value="Sprint ${product.sprint.number}"/>
   <property name="product.manufacturer" value="brackets.io"/>
-  <property name="product.registry.root" value="${product.shortname}"/>
+  <property name="product.registry.root" value="${product.shortname} ${product.version.name}"/>
 
 
   <!-- Installer properties -->