Merge pull request #190 from adobe/glenn/file-association

Initial implementation of drag and drop to open files

Author: redmunds

appshell/appshell_extensions.cpp

@@ -334,6 +334,18 @@ class ProcessMessageDelegate : public ClientHandler::ProcessMessageDelegate {
                 ExtensionString path = argList->GetString(1);
                 error = ShowFolderInOSWindow(path);
             }
+        } else if (message_name == "GetPendingFilesToOpen") {
+            // Parameters:
+            //  0: int32 - callback id
+            if (argList->GetSize() != 1) {
+                error = ERR_INVALID_PARAMS;
+            }
+            
+            if (error == NO_ERROR) {
+                ExtensionString files;
+                error = GetPendingFilesToOpen(files);
+                responseArgs->SetString(2, files.c_str());
+            }
         } else if (message_name == "AddMenu") {
             // Parameters:
             //  0: int32 - callback id

appshell/appshell_extensions.js

@@ -375,6 +375,23 @@ if (!appshell.app) {
         OpenURLInDefaultBrowser(callback, url);
     };
 
+    /**
+     * Get files passed to app at startup.
+     *
+     * @param {function(err, files)} callback Asynchronous callback function with two arguments:
+     *           err - error code
+     *           files - Array of file paths to open
+     *
+     * @return None. This is an asynchronous call that sends all return information to the callback.
+     */
+    native function GetPendingFilesToOpen();
+    appshell.app.getPendingFilesToOpen = function (callback) {
+        GetPendingFilesToOpen(function (err, files) {
+            // "files" is a string, convert to Array
+            callback(err, err ? [] : JSON.parse(files));
+        });
+    };
+
     /**
      * Set menu enabled/checked state.
      * @param {string} command ID of the menu item.

appshell/appshell_extensions_mac.mm

@@ -27,6 +27,7 @@
 
 #include <Cocoa/Cocoa.h>
 
+extern ExtensionString gPendingFilesToOpen;
 
 @interface ChromeWindowsTerminatedObserver : NSObject
 - (void)appTerminated:(NSNotification *)note;
@@ -586,6 +587,13 @@ int32 ShowFolderInOSWindow(ExtensionString pathname)
     return NO_ERROR;
 }
 
+int32 GetPendingFilesToOpen(ExtensionString& files)
+{
+    files = gPendingFilesToOpen;
+    gPendingFilesToOpen = "[]";
+    return NO_ERROR;
+}
+
 int32 GetMenuPosition(CefRefPtr<CefBrowser> browser, const ExtensionString& commandId, ExtensionString& parentId, int& index)
 {
     index = -1;

appshell/appshell_extensions_platform.h

@@ -98,6 +98,8 @@ void BringBrowserWindowToFront(CefRefPtr<CefBrowser> browser);
 
 int32 ShowFolderInOSWindow(ExtensionString pathname);
 
+int32 GetPendingFilesToOpen(ExtensionString& files);
+
 int32 AddMenu(CefRefPtr<CefBrowser> browser, ExtensionString title, ExtensionString command,
               ExtensionString position, ExtensionString relativeId);
 

appshell/appshell_extensions_win.cpp

@@ -51,6 +51,7 @@ time_t FiletimeToTime(FILETIME const& ft);
 
 extern HINSTANCE hInst;
 extern HACCEL hAccelTable;
+extern std::wstring gFilesToOpen;
 
 // constants
 #define MAX_LOADSTRING 100
@@ -798,6 +799,12 @@ int32 ShowFolderInOSWindow(ExtensionString pathname) {
     return NO_ERROR;
 }
 
+int32 GetPendingFilesToOpen(ExtensionString& files) {
+    files = gFilesToOpen;
+    ConvertToUnixPath(files);
+    gFilesToOpen = L"";
+    return NO_ERROR;
+}
 
 // Return index where menu or menu item should be placed.
 // -1 indicates append. -2 indicates 'before' - WINAPI supports 

appshell/cefclient_mac.mm

@@ -46,6 +46,10 @@
 // Memory AutoRelease pool.
 static NSAutoreleasePool* g_autopool = nil;
 
+// Files passed to the app at startup
+static NSMutableArray* pendingOpenFiles;
+ExtensionString gPendingFilesToOpen;
+
 // Provide the CefAppProtocol implementation required by CEF.
 @interface ClientApplication : NSApplication<CefAppProtocol> {
 @private
@@ -286,6 +290,8 @@ - (void)cleanup:(id)window {
 // Receives notifications from the application. Will delete itself when done.
 @interface ClientAppDelegate : NSObject
 - (void)createApp:(id)object;
+- (BOOL)application:(NSApplication *)theApplication openFile:(NSString *)filename;
+- (BOOL)application:(NSApplication *)theApplication openFiles:(NSArray *)filenames;
 @end
 
 @implementation ClientAppDelegate
@@ -420,8 +426,23 @@ - (void)createApp:(id)object {
   window_info.SetAsChild(contentView, 0, 0, content_rect.size.width, content_rect.size.height);
 
   NSString* str = [[startupUrl absoluteString] stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
-  CefBrowserHost::CreateBrowser(window_info, g_handler.get(),
+  CefBrowserHost::CreateBrowserSync(window_info, g_handler.get(),
                                 [str UTF8String], settings);
+ 
+  if (pendingOpenFiles) {
+    NSUInteger count = [pendingOpenFiles count];
+    gPendingFilesToOpen = "[";
+    for (NSUInteger i = 0; i < count; i++) {
+      NSString* filename = [pendingOpenFiles objectAtIndex:i];
+          
+      gPendingFilesToOpen += ("\"" + std::string([filename UTF8String]) + "\"");
+      if (i < count - 1)
+        gPendingFilesToOpen += ",";
+    }
+    gPendingFilesToOpen += "]";
+  } else {
+    gPendingFilesToOpen = "[]";
+  }
 
   // Show the window.
   [mainWnd display];
@@ -450,21 +471,52 @@ -(BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)theAppli
 }
 
 - (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)theApplication {
-    if (!g_isTerminating && g_handler.get() && !g_handler->AppIsQuitting() && g_handler->HasWindows()) {
+    if (!g_isTerminating && g_handler.get() && !g_handler->AppIsQuitting() && g_handler->HasWindows() && [NSApp keyWindow]) {
         g_handler->DispatchCloseToNextBrowser();
         return NSTerminateCancel;
     }
     g_isTerminating = true;
     return NSTerminateNow;
 }
 
+- (BOOL)application:(NSApplication *)theApplication openFile:(NSString *)filename {
+  if (g_handler) {
+    CefRefPtr<CefBrowser> browser = ClientHandler::GetBrowserForNativeWindow([NSApp keyWindow]);
+    g_handler->SendOpenFileCommand(browser, CefString([filename UTF8String]));
+  } else {
+    // App is just starting up. Save the filename so we can open it later.
+    if (!pendingOpenFiles) {
+      pendingOpenFiles = [[NSMutableArray alloc] init];
+      [pendingOpenFiles addObject:filename];
+    }
+  }
+  return YES;
+}
+
+- (BOOL)application:(NSApplication *)theApplication openFiles:(NSArray *)filenames {
+  if (g_handler) {
+    CefRefPtr<CefBrowser> browser = ClientHandler::GetBrowserForNativeWindow([NSApp keyWindow]);
+    for (NSUInteger i = 0; i < [filenames count]; i++) {
+      g_handler->SendOpenFileCommand(browser, CefString([[filenames objectAtIndex:i] UTF8String]));
+    }
+  } else {
+    // App is just starting up. Save the filenames so we can open them later.
+    pendingOpenFiles = [[NSMutableArray alloc] init];
+    for (NSUInteger i = 0; i < [filenames count]; i++) {
+      [pendingOpenFiles addObject:[filenames objectAtIndex:i]];
+    }
+  }
+  return YES;
+}
 @end
 
 
 int main(int argc, char* argv[]) {
   // Initialize the AutoRelease pool.
   g_autopool = [[NSAutoreleasePool alloc] init];
 
+  pendingOpenFiles = nil;
+  
   CefMainArgs main_args(argc, argv);
 
   // Delete Special Characters Palette from Edit menu.
@@ -485,6 +537,8 @@ int main(int argc, char* argv[]) {
 
   // Initialize the ClientApplication instance.
   [ClientApplication sharedApplication];
+  NSObject* delegate = [[ClientAppDelegate alloc] init];
+  [NSApp setDelegate:delegate];
 
   // Parse command line arguments.
   AppInitCommandLine(argc, argv);
@@ -552,7 +606,6 @@ int main(int argc, char* argv[]) {
   }
 
   // Create the application delegate and window.
-  NSObject* delegate = [[ClientAppDelegate alloc] init];
   [delegate performSelectorOnMainThread:@selector(createApp:) withObject:nil
                           waitUntilDone:NO];
 

appshell/cefclient_win.cpp

@@ -20,6 +20,8 @@
 #include "client_switches.h"
 #include "native_menu_model.h"
 
+#include <algorithm>
+#include <ShellAPI.h>
 #include <ShlObj.h>
 
 #define MAX_LOADSTRING 100
@@ -37,6 +39,7 @@ DWORD g_appStartupTime;
 HINSTANCE hInst;   // current instance
 HACCEL hAccelTable;
 HWND hWndMain;
+std::wstring gFilesToOpen; // Filenames passed as arguments to app
 TCHAR szTitle[MAX_LOADSTRING];  // The title bar text
 TCHAR szWindowClass[MAX_LOADSTRING];  // the main window class name
 char szWorkingDir[MAX_PATH];  // The current working directory
@@ -82,6 +85,37 @@ void SaveWindowRect(HWND hWnd);
 void RestoreWindowRect(int& left, int& top, int& width, int& height, int& showCmd);
 void RestoreWindowPlacement(HWND hWnd, int showCmd);
 
+bool IsFilename(const std::wstring& str) {
+    // See if we can access the passed in value
+    return (GetFileAttributes(str.c_str()) != INVALID_FILE_ATTRIBUTES);
+}
+
+std::wstring GetFilenamesFromCommandLine() {
+    std::wstring result = L"[]";
+
+    if (AppGetCommandLine()->HasArguments()) {
+        bool firstEntry = true;
+        std::vector<CefString> args;
+        AppGetCommandLine()->GetArguments(args);
+        std::vector<CefString>::iterator iterator;
+
+        result = L"[";
+        for (iterator = args.begin(); iterator != args.end(); iterator++) {
+            std::wstring argument = (*iterator).ToWString();
+            if (IsFilename(argument)) {
+                if (!firstEntry) {
+                    result += L",";
+                }
+                firstEntry = false;
+                result += L"\"" + argument + L"\"";
+            }
+        }
+        result += L"]";
+    }
+
+    return result;
+}
+
 // Program entry point function.
 int APIENTRY wWinMain(HINSTANCE hInstance,
                      HINSTANCE hPrevInstance,
@@ -182,6 +216,8 @@ int APIENTRY wWinMain(HINSTANCE hInstance,
   if (!InitInstance (hInstance, nCmdShow))
     return FALSE;
 
+  gFilesToOpen = GetFilenamesFromCommandLine();
+
   int result = 0;
 
   if (!settings.multi_threaded_message_loop) {
@@ -520,12 +556,25 @@ BOOL InitInstance(HINSTANCE hInstance, int nCmdShow) {
   if (!hWndMain)
     return FALSE;
 
+  DragAcceptFiles(hWndMain, TRUE);
   RestoreWindowPlacement(hWndMain, showCmd);
   UpdateWindow(hWndMain);
-
+\
   return TRUE;
 }
 
+LRESULT HandleDropFiles(HDROP hDrop, CefRefPtr<ClientHandler> handler, CefRefPtr<CefBrowser> browser) {
+    UINT fileCount = DragQueryFile(hDrop, 0xFFFFFFFF, NULL, 0);
+    for (UINT i = 0; i < fileCount; i++) {
+        wchar_t filename[MAX_PATH];
+        DragQueryFile(hDrop, i, filename, MAX_PATH);
+        std::wstring pathStr(filename);
+        replace(pathStr.begin(), pathStr.end(), '\\', '/');
+        handler->SendOpenFileCommand(browser, CefString(pathStr));
+    }
+    return 0;
+}
+
 //
 //  FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM)
 //
@@ -806,6 +855,12 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam,
       PostQuitMessage(0);
       return 0;
 
+    case WM_DROPFILES:
+        if (g_handler.get()) {
+            return HandleDropFiles((HDROP)wParam, g_handler, g_handler->GetBrowser());
+        }
+        return 0;
+
     case WM_INITMENUPOPUP:
         HMENU menu = (HMENU)wParam;
         int count = GetMenuItemCount(menu);
@@ -912,4 +967,4 @@ CefString AppGetProductVersionString() {
   s.append(L"/");
   s.append(version);
   return CefString(s);
-}
+}

appshell/client_handler.cpp

@@ -340,6 +340,14 @@ bool ClientHandler::SendJSCommand(CefRefPtr<CefBrowser> browser, const CefString
   return browser->SendProcessMessage(PID_RENDERER, message);
 }
 
+void ClientHandler::SendOpenFileCommand(CefRefPtr<CefBrowser> browser, const CefString &filename) {
+  std::string filenameStr(filename);
+  // FIXME: Use SendJSCommand once it supports parameters
+  std::string cmd = "require('command/CommandManager').execute('file.open',{fullPath:'" + filenameStr + "'})";
+  browser->GetMainFrame()->ExecuteJavaScript(CefString(cmd.c_str()),
+                                browser->GetMainFrame()->GetURL(), 0);
+}
+
 void ClientHandler::DispatchCloseToNextBrowser()
 {
   // If the inner loop iterates thru all browsers and there's still at least one

appshell/client_handler.h

@@ -200,6 +200,7 @@ class ClientHandler : public CefClient,
   // If callback is specified, it will be called with the result from the command.
   bool SendJSCommand(CefRefPtr<CefBrowser> browser, const CefString& command, CefRefPtr<CommandCallback> callback = NULL);
 
+  void SendOpenFileCommand(CefRefPtr<CefBrowser> browser, const CefString& filename);
   void DispatchCloseToNextBrowser();
   void AbortQuit();
   static CefRefPtr<CefBrowser> GetBrowserForNativeWindow(void* window);

appshell/client_handler_win.cpp

@@ -10,11 +10,15 @@
 #include "resource.h"
 #include "native_menu_model.h"
 
+#include <ShellAPI.h>
+
 #define CLOSING_PROP L"CLOSING"
 
-// The global ClientHandler reference.
 extern CefRefPtr<ClientHandler> g_handler;
 
+// WM_DROPFILES handler, defined in cefclient_win.cpp
+extern LRESULT HandleDropFiles(HDROP hDrop, CefRefPtr<ClientHandler> handler, CefRefPtr<CefBrowser> browser);
+
 // Additional globals
 extern HACCEL hAccelTable;
 
@@ -151,6 +155,12 @@ LRESULT CALLBACK PopupWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lPa
       }
       break;
 
+    case WM_DROPFILES:
+      if (g_handler.get() && browser.get()) {
+        return HandleDropFiles((HDROP)wParam, g_handler, browser);
+      }
+      break;
+
     case WM_INITMENUPOPUP:
         HMENU menu = (HMENU)wParam;
         int count = GetMenuItemCount(menu);
@@ -216,6 +226,7 @@ void ClientHandler::PopupCreated(CefRefPtr<CefBrowser> browser)
     HWND hWnd = browser->GetHost()->GetWindowHandle();
     AttachWindProcToPopup(hWnd);
     LoadWindowsIcons(hWnd);
+    DragAcceptFiles(hWnd, true);
     browser->GetHost()->SetFocus(true);
 }
 
@@ -261,4 +272,4 @@ bool ClientHandler::OnKeyEvent(CefRefPtr<CefBrowser> browser,
                                 const CefKeyEvent& event,
                                 CefEventHandle os_event) {
   return false;
-}
+}