fix for #121122 (nsIFilePicker should allow picking multiple files) and #43015 (Cannot add multiple attachment in Attach File dialog).

right now, only supported on windows.  bugs logged for mac, beos, cocoa, os/2, qnx
and the xpfilepicker (linux).

r=bz, sr=bienvenu, a=asa

mailnews/compose/resources/content/MsgComposeCommands.js

@@ -178,8 +178,8 @@ function enableEditableFields()
 var gComposeRecyclingListener = {
   onClose: function() {
     //Reset recipients and attachments
-	  awResetAllRows();
-	  RemoveAllAttachments();
+    awResetAllRows();
+    RemoveAllAttachments();
 
 	  //We need to clear the identity popup menu in case the user will change them. It will be rebuilded later in ComposeStartup
     ClearIdentityListPopup(document.getElementById("msgIdentityPopup"));
@@ -2191,12 +2191,12 @@ function SetLastAttachDirectory(attachedLocalFile)
 
 function AttachFile()
 {
-  var currentAttachment = "";
+  var attachments;
   
   //Get file using nsIFilePicker and convert to URL
   try {
       var fp = Components.classes["@mozilla.org/filepicker;1"].createInstance(nsIFilePicker);
-      fp.init(window, sComposeMsgsBundle.getString("chooseFileToAttach"), nsIFilePicker.modeOpen);
+      fp.init(window, sComposeMsgsBundle.getString("chooseFileToAttach"), nsIFilePicker.modeOpenMultiple);
       
       var lastDirectory = GetLastAttachDirectory();
       if (lastDirectory) 
@@ -2204,28 +2204,36 @@ function AttachFile()
 
       fp.appendFilters(nsIFilePicker.filterAll);
       if (fp.show() == nsIFilePicker.returnOK) {
-        currentAttachment = fp.fileURL.spec;
-        SetLastAttachDirectory(fp.file)
+        attachments = fp.files;
       }
   }
   catch (ex) {
-    dump("failed to get the local file to attach\n");
+    dump("failed to get attachments: " + ex + "\n");
   }
-  
-  if (currentAttachment == "")
+
+  if (!attachments || !attachments.hasMoreElements())
     return;
 
-  if (DuplicateFileCheck(currentAttachment))
-  {
-    dump("Error, attaching the same item twice\n");
-  }
-  else
-  {
-    var attachment = Components.classes["@mozilla.org/messengercompose/attachment;1"]
-                     .createInstance(Components.interfaces.nsIMsgAttachment);
-    attachment.url = currentAttachment;
-    AddAttachment(attachment);
-    gContentChanged = true;
+  var haveSetAttachDirectory = false;
+
+  while (attachments.hasMoreElements()) {
+    var currentFile = attachments.getNext().QueryInterface(Components.interfaces.nsILocalFile);
+
+    if (!haveSetAttachDirectory) {
+      SetLastAttachDirectory(currentFile);
+      haveSetAttachDirectory = true;
+    }
+
+    var ioService = Components.classes["@mozilla.org/network/io-service;1"]
+    ioService = ioService.getService(Components.interfaces.nsIIOService);
+    var currentAttachment = ioService.getURLSpecFromFile(currentFile);
+
+    if (!DuplicateFileCheck(currentAttachment)) {
+      var attachment = Components.classes["@mozilla.org/messengercompose/attachment;1"].createInstance(Components.interfaces.nsIMsgAttachment);
+      attachment.url = currentAttachment;
+      AddAttachment(attachment);
+      gContentChanged = true;
+    }
   }
 }
 

widget/public/nsIFilePicker.idl

@@ -26,6 +26,7 @@
 interface nsILocalFile;
 interface nsIFileURL;
 interface nsIDOMWindowInternal;
+interface nsISimpleEnumerator;
 
 [scriptable, uuid(c47de916-1dd1-11b2-8141-82507fa02b21)]
 interface nsIFilePicker : nsISupports
@@ -33,6 +34,7 @@ interface nsIFilePicker : nsISupports
   const short modeOpen        = 0;              // Load a file or directory
   const short modeSave        = 1;              // Save a file or directory
   const short modeGetFolder   = 2;              // Select a folder/directory
+  const short modeOpenMultiple= 3;              // Load multiple files
 
   const short returnOK        = 0;              // User hit Ok, process selection
   const short returnCancel    = 1;              // User hit cancel, ignore selection
@@ -118,6 +120,14 @@ interface nsIFilePicker : nsISupports
   */
   readonly attribute nsIFileURL fileURL;
 
+ /**
+  * Get the enumerator for the selected files
+  * only works in the modeOpenMultiple mode
+  *
+  * @return Returns the files currently selected
+  */
+  readonly attribute nsISimpleEnumerator files;
+
  /**
   * Show File Dialog. The dialog is displayed modally.
   *

widget/src/beos/nsFilePicker.cpp

@@ -80,7 +80,7 @@ NS_IMETHODIMP nsFilePicker::Show(PRInt16 *retval)
     node_flavors = B_DIRECTORY_NODE;
     panel_mode = B_OPEN_PANEL;
   }
-  else if (mMode == modeOpen) {
+  else if (mMode == modeOpen || mMode == modeOpenMultiple) {
     node_flavors = B_FILE_NODE;
     panel_mode = B_OPEN_PANEL;
   }
@@ -136,7 +136,7 @@ NS_IMETHODIMP nsFilePicker::Show(PRInt16 *retval)
     result = PR_FALSE;
   }
 
-  if (mMode == modeOpen && ppanel->IsOpenSelected()) {
+  if ((mMode == modeOpen || mMode == modeOpenMultiple) && ppanel->IsOpenSelected()) {
     BList *list = ppanel->OpenRefs();
     if ((list) && list->CountItems() >= 1) {
       entry_ref *ref = (entry_ref *)list->ItemAt(0);

widget/src/cocoa/nsFilePicker.cpp

@@ -208,7 +208,7 @@ NS_IMETHODIMP nsFilePicker::Show(PRInt16 *retval)
   
   // XXX Ignore the filter list for now....
   
-  if (mMode == modeOpen)
+  if (mMode == modeOpen || mMode == modeOpenMultiple)
     userClicksOK = GetLocalFile(title, &theFile);
   else if (mMode == modeSave)
     userClicksOK = PutLocalFile(title, defaultName, &theFile);

widget/src/mac/nsFilePicker.cpp

@@ -160,7 +160,7 @@ NS_IMETHODIMP nsFilePicker::Show(PRInt16 *retval)
   
   // XXX Ignore the filter list for now....
   
-  if (mMode == modeOpen)
+  if (mMode == modeOpen || mMode == modeOpenMultiple)
     userClicksOK = GetLocalFile(mTitle, &theFile);
   else if (mMode == modeSave)
     userClicksOK = PutLocalFile(mTitle, mDefault, &theFile);

widget/src/windows/nsFilePicker.cpp

@@ -19,6 +19,7 @@
  * 
  * Contributor(s):
  *   Stuart Parmenter <pavlov@netscape.com>
+ *   Seth Spitzer <sspitzer@netscape.com>
  */
 
 // Define so header files for openfilename are included
@@ -36,6 +37,7 @@
 #include "nsIURL.h"
 #include "nsIFileURL.h"
 #include "nsIStringBundle.h"
+#include "nsEnumeratorUtils.h"
 #include "nsCRT.h"
 #include <windows.h>
 #include <SHLOBJ.H>
@@ -404,6 +406,10 @@ NS_IMETHODIMP nsFilePicker::Show(PRInt16 *aReturnVal)
       ofn.Flags |= OFN_FILEMUSTEXIST;
       result = ::GetOpenFileName(&ofn);
     }
+    else if (mMode == modeOpenMultiple) {
+      ofn.Flags |= OFN_FILEMUSTEXIST | OFN_ALLOWMULTISELECT | OFN_EXPLORER;
+      result = ::GetOpenFileName(&ofn);
+    }
     else if (mMode == modeSave) {
       ofn.Flags |= OFN_NOREADONLYRETURN;
       result = ::GetSaveFileName(&ofn);
@@ -433,9 +439,53 @@ NS_IMETHODIMP nsFilePicker::Show(PRInt16 *aReturnVal)
     if (result == PR_TRUE) {
       // I think it also needs a conversion here (to unicode since appending to nsString) 
       // but doing that generates garbage file name, weird.
+      if (mMode == modeOpenMultiple) {
+        nsresult rv = NS_NewISupportsArray(getter_AddRefs(mFiles));
+        NS_ENSURE_SUCCESS(rv,rv);
+
+        // from msdn.microsoft.com, "Open and Save As Dialog Boxes" section:
+        // If you specify OFN_EXPLORER,
+        // The directory and file name strings are NULL separated, 
+        // with an extra NULL character after the last file name. 
+        // This format enables the Explorer-style dialog boxes
+        // to return long file names that include spaces. 
+        char *current = fileBuffer;
+        const char *dirName = current;
+
+        while (current && *current && *(current + strlen(current) + 1)) {
+          current = current + strlen(current) + 1;
+          
+          nsCOMPtr<nsILocalFile> file = do_CreateInstance("@mozilla.org/file/local;1", &rv);
+          NS_ENSURE_SUCCESS(rv,rv);
+
+          // dirName contains a trailing slash
+          rv = file->InitWithNativePath(nsDependentCString(dirName) + nsDependentCString(current));
+          NS_ENSURE_SUCCESS(rv,rv);
+           
+          rv = mFiles->AppendElement(file);
+          NS_ENSURE_SUCCESS(rv,rv);
+        }
+         
+        // handle the case where the user selected just one
+        // file.  according to msdn.microsoft.com:
+        // If you specify OFN_ALLOWMULTISELECT and the user selects 
+        // only one file, the lpstrFile string does not have 
+        // a separator between the path and file name.
+        if (current && *current && (current == fileBuffer)) {
+          nsCOMPtr<nsILocalFile> file = do_CreateInstance("@mozilla.org/file/local;1", &rv);
+          NS_ENSURE_SUCCESS(rv,rv);
+
+          rv = file->InitWithNativePath(nsDependentCString(current));
+          NS_ENSURE_SUCCESS(rv,rv);
+           
+          rv = mFiles->AppendElement(file);
+          NS_ENSURE_SUCCESS(rv,rv);
+        }
+      }
+      else {
       mFile.Append(fileBuffer);
     }
-
+    }
   }
 
   if (title)
@@ -528,6 +578,12 @@ NS_IMETHODIMP nsFilePicker::GetFileURL(nsIFileURL **aFileURL)
   return NS_OK;
 }
 
+NS_IMETHODIMP nsFilePicker::GetFiles(nsISimpleEnumerator **aFiles)
+{
+  NS_ENSURE_ARG_POINTER(aFiles);
+  return NS_NewArrayEnumerator(aFiles, mFiles);
+}
+
 //-------------------------------------------------------------------------
 //
 // Get the file + path

widget/src/windows/nsFilePicker.h

@@ -19,12 +19,15 @@
  * 
  * Contributor(s): 
  *   Stuart Parmenter <pavlov@netscape.com>
+ *   Seth Spitzer <sspitzer@netscape.com>
  */
 
 #ifndef nsFilePicker_h__
 #define nsFilePicker_h__
 
 #include "nsILocalFile.h"
+#include "nsISimpleEnumerator.h"
+#include "nsISupportsArray.h"
 
 #include "nsICharsetConverterManager.h"
 #include "nsBaseFilePicker.h"
@@ -54,6 +57,7 @@ public:
   NS_IMETHOD SetFilterIndex(PRInt32 aFilterIndex);
   NS_IMETHOD GetFile(nsILocalFile * *aFile);
   NS_IMETHOD GetFileURL(nsIFileURL * *aFileURL);
+  NS_IMETHOD GetFiles(nsISimpleEnumerator **aFiles);
   NS_IMETHOD Show(PRInt16 *aReturnVal); 
 #ifdef MOZ_UNICODE
   NS_IMETHOD ShowW(PRInt16 *aReturnVal); 
@@ -83,7 +87,7 @@ protected:
   nsIUnicodeDecoder*     mUnicodeDecoder;
   nsCOMPtr<nsILocalFile> mDisplayDirectory;
   PRInt16                mSelectedType;
-
+  nsCOMPtr <nsISupportsArray> mFiles;
   static char            mLastUsedDirectory[];
 
 #ifdef MOZ_UNICODE

widget/src/xpwidgets/nsBaseFilePicker.cpp

@@ -36,6 +36,9 @@
 #include "nsIStringBundle.h"
 #include "nsXPIDLString.h"
 #include "nsIServiceManager.h"
+#include "nsISupportsArray.h"
+#include "nsILocalFile.h"
+#include "nsEnumeratorUtils.h"
 
 #include "nsBaseFilePicker.h"
 
@@ -183,3 +186,22 @@ NS_IMETHODIMP nsBaseFilePicker::SetFilterIndex(PRInt32 aFilterIndex)
   return NS_OK;
 }
 
+NS_IMETHODIMP nsBaseFilePicker::GetFiles(nsISimpleEnumerator **aFiles)
+{
+  NS_ENSURE_ARG_POINTER(aFiles);
+  nsCOMPtr <nsISupportsArray> files;
+  nsresult rv = NS_NewISupportsArray(getter_AddRefs(files));
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  // if we get into the base class, the platform
+  // doesn't implement GetFiles() yet.
+  // so we fake it.
+  nsCOMPtr <nsILocalFile> file;
+  rv = GetFile(getter_AddRefs(file));
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  rv = files->AppendElement(file);
+  NS_ENSURE_SUCCESS(rv,rv);
+
+  return NS_NewArrayEnumerator(aFiles, files);
+}

widget/src/xpwidgets/nsBaseFilePicker.h

@@ -27,6 +27,7 @@
 
 #include "nsIFilePicker.h"
 #include "nsIWidget.h"
+#include "nsISimpleEnumerator.h"
 
 class nsBaseFilePicker : public nsIFilePicker
 {
@@ -41,6 +42,7 @@ public:
   NS_IMETHOD AppendFilters(PRInt32 filterMask);
   NS_IMETHOD GetFilterIndex(PRInt32 *aFilterIndex);
   NS_IMETHOD SetFilterIndex(PRInt32 aFilterIndex);
+  NS_IMETHOD GetFiles(nsISimpleEnumerator **aFiles);
 
 protected:
 

xpfe/components/filepicker/res/content/filepicker.js

@@ -78,12 +78,13 @@ function filepickerLoad() {
     }
   }
 
-  if (filePickerMode != nsIFilePicker.modeOpen) {
+  if (filePickerMode != nsIFilePicker.modeOpen && filePickerMode != nsIFilePicker.modeOpenMultiple) {
     var newDirButton = document.getElementById("newDirButton");
     newDirButton.removeAttribute("hidden");
   }
 
   if ((filePickerMode == nsIFilePicker.modeOpen) ||
+      (filePickerMode == nsIFilePicker.modeOpenMultiple) ||
       (filePickerMode == nsIFilePicker.modeSave)) {
 
     treeView.setFilter(filterTypes[0]);
@@ -199,7 +200,9 @@ function openOnOK()
 
   if (dir)
     gotoDirectory(dir);
+
   retvals.file = dir;
+
   retvals.buttonStatus = nsIFilePicker.returnCancel;
   
   var filterMenuList = document.getElementById("filterMenuList");
@@ -248,6 +251,7 @@ function selectOnOK()
 
   switch(filePickerMode) {
   case nsIFilePicker.modeOpen:
+  case nsIFilePicker.modeOpenMultiple:
     if (isFile) {
       if (file.isReadable()) {
         retvals.directory = file.parent.path;
@@ -339,6 +343,11 @@ function selectOnOK()
   }
 
   retvals.file = file;
+
+  gFilesEnumerator.mFile = file;
+  gFilesEnumerator.mHasMore = true;
+
+  retvals.files = gFilesEnumerator;
   retvals.buttonStatus = ret;
 
   var filterMenuList = document.getElementById("filterMenuList");
@@ -347,11 +356,27 @@ function selectOnOK()
   return (ret != nsIFilePicker.returnCancel);
 }
 
+var gFilesEnumerator = {
+  mHasMore: false,
+  mFile: null,
+
+  hasMoreElements: function()
+  {
+    return this.mHasMore;
+  },
+  getNext: function()
+  {
+    this.mHasMore = false;
+    return this.mFile;
+  }
+};
+
 function onCancel()
 {
   // Close the window.
   retvals.buttonStatus = nsIFilePicker.returnCancel;
   retvals.file = null;
+  retvals.files = null;
   return true;
 }
 
@@ -465,6 +490,7 @@ function getOKAction(file) {
       buttonLabel = gFilePickerBundle.getString("selectFolderButtonLabel");
       break;
     case nsIFilePicker.modeOpen:
+    case nsIFilePicker.modeOpenMultiple:
       buttonLabel = gFilePickerBundle.getString("openButtonLabel");
       break;
     case nsIFilePicker.modeSave:

xpfe/components/filepicker/src/nsFilePicker.js

@@ -84,6 +84,10 @@ nsFilePicker.prototype = {
   set file(a) { throw "readonly property"; },
   get file()  { return this.mFile; },
 
+  /* readonly attribute nsISimpleEnumerator files; */
+  set files(a) { throw "readonly property"; },
+  get files()  { return this.mFilesEnumerator; },
+
   /* readonly attribute nsIFileURL fileURL; */
   set fileURL(a) { throw "readonly property"; },
   get fileURL()  { 
@@ -110,6 +114,7 @@ nsFilePicker.prototype = {
 
   /* members */
   mFile: undefined,
+  mFilesEnumerator: undefined,
   mParentWindow: null,
 
   /* methods */
@@ -197,6 +202,7 @@ nsFilePicker.prototype = {
                         o);
       this.mFile = o.retvals.file;
       this.mFilterIndex = o.retvals.filterIndex;
+      this.mFilesEnumerator = o.retvals.files;
       lastDirectory = o.retvals.directory;
       return o.retvals.buttonStatus;
     } catch(ex) { dump("unable to open file picker\n" + ex + "\n"); }

xpfe/components/filepicker/src/nsFilePicker.js.in

@@ -84,6 +84,10 @@ nsFilePicker.prototype = {
   set file(a) { throw "readonly property"; },
   get file()  { return this.mFile; },
 
+  /* readonly attribute nsISimpleEnumerator files; */
+  set files(a) { throw "readonly property"; },
+  get files()  { return this.mFilesEnumerator; },
+
   /* readonly attribute nsIFileURL fileURL; */
   set fileURL(a) { throw "readonly property"; },
   get fileURL()  { 
@@ -110,6 +114,7 @@ nsFilePicker.prototype = {
 
   /* members */
   mFile: undefined,
+  mFilesEnumerator: undefined,
   mParentWindow: null,
 
   /* methods */
@@ -197,6 +202,7 @@ nsFilePicker.prototype = {
                         o);
       this.mFile = o.retvals.file;
       this.mFilterIndex = o.retvals.filterIndex;
+      this.mFilesEnumerator = o.retvals.files;
       lastDirectory = o.retvals.directory;
       return o.retvals.buttonStatus;
     } catch(ex) { dump("unable to open file picker\n" + ex + "\n"); }