* Added a simple list view that can indicate that it accepts a dragged object.

* The extension list is now using this list view: when you drop some files on
  it, it will now take over their extension into the list.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19290 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/preferences/filetypes/DropTargetListView.cpp

@@ -0,0 +1,66 @@
+/*
+ * Copyright 2006, Axel Dörfler, [email protected]. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include "DropTargetListView.h"
+
+
+DropTargetListView::DropTargetListView(BRect frame, const char* name,
+		list_view_type type, uint32 resizeMask, uint32 flags)
+	: BListView(frame, name, type, resizeMask, flags),
+	fDropTarget(false)
+{
+}
+
+
+DropTargetListView::~DropTargetListView()
+{
+}
+
+
+void
+DropTargetListView::Draw(BRect updateRect)
+{
+	BListView::Draw(updateRect);
+
+	if (fDropTarget) {
+		// mark this view as a drop target
+		rgb_color color = HighColor();
+		SetHighColor(ui_color(B_KEYBOARD_NAVIGATION_COLOR));
+		StrokeRect(Bounds());
+		SetHighColor(color);
+	}
+}
+
+
+void
+DropTargetListView::MouseMoved(BPoint where, uint32 transit,
+	const BMessage* dragMessage)
+{
+	if (dragMessage != NULL && AcceptsDrag(dragMessage)) {
+		bool dropTarget = transit == B_ENTERED_VIEW || transit == B_INSIDE_VIEW;
+		if (dropTarget != fDropTarget) {
+			fDropTarget = dropTarget;
+			_InvalidateFrame();
+		}
+	} else if (fDropTarget) {
+		fDropTarget = false;
+		_InvalidateFrame();
+	}
+}
+
+
+bool
+DropTargetListView::AcceptsDrag(const BMessage* /*message*/)
+{
+	return true;
+}
+
+
+void
+DropTargetListView::_InvalidateFrame()
+{
+	Invalidate();
+}

src/preferences/filetypes/DropTargetListView.h

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2006, Axel Dörfler, [email protected]. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef DROP_TARGET_LIST_VIEW_H
+#define DROP_TARGET_LIST_VIEW_H
+
+
+#include <ListView.h>
+
+
+class DropTargetListView : public BListView {
+	public:
+		DropTargetListView(BRect frame, const char* name,
+			list_view_type type = B_SINGLE_SELECTION_LIST,
+			uint32 resizeMask = B_FOLLOW_LEFT | B_FOLLOW_TOP,
+			uint32 flags = B_WILL_DRAW | B_FRAME_EVENTS | B_NAVIGABLE);
+		virtual ~DropTargetListView();
+
+		virtual void Draw(BRect updateRect);
+		virtual void MouseMoved(BPoint where, uint32 transit,
+			const BMessage* dragMessage);
+
+		virtual bool AcceptsDrag(const BMessage* message);
+
+	private:
+		void _InvalidateFrame();
+
+		bool	fDropTarget;
+};
+
+#endif	// DROP_TARGET_LIST_VIEW_H

src/preferences/filetypes/ExtensionWindow.cpp

@@ -38,6 +38,57 @@ compare_extensions(const void* _a, const void* _b)
 }
 
 
+status_t
+add_extensions(BMimeType& type, BList& list, const char* removeExtension)
+{
+	BMessage extensions;
+	status_t status = type.GetFileExtensions(&extensions);
+	if (status < B_OK)
+		return status;
+
+	// replace the entry, and remove any equivalent entries
+	BList newList;
+	newList.AddList(&list);
+
+	const char* extension;
+	for (int32 i = 0; extensions.FindString("extensions", i,
+			&extension) == B_OK; i++) {
+		bool add = true;
+		for (int32 j = list.CountItems(); j-- > 0;) {
+			if ((removeExtension && !strcmp(removeExtension, extension))
+				|| !strcmp((const char*)list.ItemAt(j), extension)) {
+				// remove this item
+				continue;
+			}
+		}
+
+		if (add)
+			newList.AddItem((void *)extension);
+	}
+
+	newList.SortItems(compare_extensions);
+
+	// Copy them to a new message (their memory is still part of the
+	// original BMessage)
+	BMessage newExtensions;
+	for (int32 i = 0; i < newList.CountItems(); i++) {
+		newExtensions.AddString("extensions", (const char*)newList.ItemAt(i));
+	}
+
+	return type.SetFileExtensions(&newExtensions);
+}
+
+
+status_t
+replace_extension(BMimeType& type, const char* newExtension, const char* oldExtension)
+{
+	BList list;
+	list.AddItem((void *)newExtension);
+
+	return add_extensions(type, list, oldExtension);
+}
+
+
 //	#pragma mark -
 
 
@@ -139,37 +190,8 @@ ExtensionWindow::MessageReceived(BMessage* message)
 			if (newExtension[0] == '.')
 				newExtension++;
 
-			BMessage extensions;
-			status_t status = fMimeType.GetFileExtensions(&extensions);
-			if (status == B_OK) {
-				// replace the entry, and remove any equivalent entries
-				BList list;
-				list.AddItem((void *)newExtension);
-
-				const char* extension;
-				for (int32 i = 0; extensions.FindString("extensions", i,
-						&extension) == B_OK; i++) {
-					if (!strcmp(fExtension.String(), extension)
-						|| !strcmp(newExtension, extension)) {
-						// remove this item
-						continue;
-					}
-
-					list.AddItem((void *)extension);
-				}
-
-				list.SortItems(compare_extensions);
-
-				// Copy them to a new message (their memory is still part of the
-				// original BMessage)
-				BMessage newExtensions;
-				for (int32 i = 0; i < list.CountItems(); i++) {
-					newExtensions.AddString("extensions", (const char*)list.ItemAt(i));
-				}
-
-				status = fMimeType.SetFileExtensions(&newExtensions);
-			}
-
+			status_t status = replace_extension(fMimeType, newExtension,
+				fExtension.String());
 			if (status != B_OK)
 				error_alert("Could not change file extensions", status);
 

src/preferences/filetypes/ExtensionWindow.h

@@ -33,4 +33,9 @@ class ExtensionWindow : public BWindow {
 		BButton*		fAcceptButton;
 };
 
+extern status_t add_extensions(BMimeType& type, BList& list,
+	const char* removeExtension = NULL);
+extern status_t replace_extension(BMimeType& type, const char* newExtension,
+	const char* oldExtension);
+
 #endif	// EXTENSION_WINDOW_H

src/preferences/filetypes/FileTypesWindow.cpp

@@ -6,6 +6,7 @@
 
 #include "AttributeListView.h"
 #include "AttributeWindow.h"
+#include "DropTargetListView.h"
 #include "ExtensionWindow.h"
 #include "FileTypes.h"
 #include "FileTypesWindow.h"
@@ -35,6 +36,7 @@
 #include <be_apps/Tracker/RecentItems.h>
 
 #include <stdio.h>
+#include <stdlib.h>
 
 
 const uint32 kMsgTypeSelected = 'typs';
@@ -87,6 +89,23 @@ class TypeIconView : public BControl {
 		icon_source	fIconSource;
 };
 
+class ExtensionListView : public DropTargetListView {
+	public:
+		ExtensionListView(BRect frame, const char* name,
+			list_view_type type = B_SINGLE_SELECTION_LIST,
+			uint32 resizeMask = B_FOLLOW_LEFT | B_FOLLOW_TOP,
+			uint32 flags = B_WILL_DRAW | B_FRAME_EVENTS | B_NAVIGABLE);
+		virtual ~ExtensionListView();
+
+		virtual void MessageReceived(BMessage* message);
+		virtual bool AcceptsDrag(const BMessage* message);
+
+		void SetType(BMimeType* type);
+
+	private:
+		BMimeType	fType;
+};
+
 
 //	#pragma mark -
 
@@ -238,6 +257,74 @@ TypeIconView::MouseDown(BPoint where)
 //	#pragma mark -
 
 
+ExtensionListView::ExtensionListView(BRect frame, const char* name,
+		list_view_type type, uint32 resizeMask, uint32 flags)
+	: DropTargetListView(frame, name, type, resizeMask, flags)
+{
+}
+
+
+ExtensionListView::~ExtensionListView()
+{
+}
+
+
+void
+ExtensionListView::MessageReceived(BMessage* message)
+{
+	if (message->WasDropped() && AcceptsDrag(message)) {
+		// create extension list
+		BList list;
+		entry_ref ref;
+		for (int32 index = 0; message->FindRef("refs", index++, &ref) == B_OK; ) {
+			const char* point = strchr(ref.name, '.');
+			if (point != NULL && point[1])
+				list.AddItem(strdup(++point));
+		}
+
+		add_extensions(fType, list);
+
+		// delete extension list
+		for (int32 index = list.CountItems(); index-- > 0;) {
+			free(list.ItemAt(index));
+		}
+	} else
+		DropTargetListView::MessageReceived(message);
+}
+
+
+bool
+ExtensionListView::AcceptsDrag(const BMessage* message)
+{
+	if (fType.Type() == NULL)
+		return false;
+
+	int32 count = 0;
+	entry_ref ref;
+
+	for (int32 index = 0; message->FindRef("refs", index++, &ref) == B_OK; ) {
+		const char* point = strchr(ref.name, '.');
+		if (point != NULL && point[1])
+			count++;
+	}
+
+	return count > 0;
+}
+
+
+void
+ExtensionListView::SetType(BMimeType* type)
+{
+	if (type != NULL)
+		fType.SetTo(type->Type());
+	else
+		fType.Unset();
+}
+
+
+//	#pragma mark -
+
+
 FileTypesWindow::FileTypesWindow(const BMessage& settings)
 	: BWindow(_Frame(settings), "FileTypes", B_TITLED_WINDOW,
 		B_NOT_ZOOMABLE | B_ASYNCHRONOUS_CONTROLS),
@@ -395,7 +482,7 @@ FileTypesWindow::FileTypesWindow(const BMessage& settings)
 	innerRect.top = fAddExtensionButton->Frame().top + 2.0f;
 	innerRect.bottom = innerRect.bottom - 2.0f;
 		// take scrollview border into account
-	fExtensionListView = new BListView(innerRect, "listview ext",
+	fExtensionListView = new ExtensionListView(innerRect, "listview ext",
 		B_SINGLE_SELECTION_LIST, B_FOLLOW_LEFT_RIGHT);
 	fExtensionListView->SetSelectionMessage(new BMessage(kMsgExtensionSelected));
 	fExtensionListView->SetInvocationMessage(new BMessage(kMsgExtensionInvoked));
@@ -696,6 +783,8 @@ FileTypesWindow::_SetType(BMimeType* type, int32 forceUpdate)
 				rule = "";
 			fRuleControl->SetText(rule.String());
 		}
+
+		fExtensionListView->SetType(&fCurrentType);
 	} else {
 		fCurrentType.Unset();
 		fInternalNameView->SetText(NULL);
@@ -703,6 +792,7 @@ FileTypesWindow::_SetType(BMimeType* type, int32 forceUpdate)
 		fDescriptionControl->SetText(NULL);
 		fRuleControl->SetText(NULL);
 		fPreferredField->Menu()->ItemAt(0)->SetMarked(true);
+		fExtensionListView->SetType(NULL);
 	}
 
 	if ((forceUpdate & B_FILE_EXTENSIONS_CHANGED) != 0)

src/preferences/filetypes/FileTypesWindow.h

@@ -19,6 +19,7 @@ class BOutlineListView;
 class BTextControl;
 
 class AttributeListView;
+class ExtensionListView;
 class TypeIconView;
 class MimeTypeListView;
 class StringView;
@@ -54,7 +55,7 @@ class FileTypesWindow : public BWindow {
 
 		BBox*			fRecognitionBox;
 		StringView*		fExtensionLabel;
-		BListView*		fExtensionListView;
+		ExtensionListView* fExtensionListView;
 		BButton*		fAddExtensionButton;
 		BButton*		fRemoveExtensionButton;
 		BTextControl*	fRuleControl;

src/preferences/filetypes/Jamfile

@@ -12,6 +12,7 @@ Preference FileTypes :
 	FileTypesWindow.cpp
 	ApplicationTypesWindow.cpp
 	AttributeListView.cpp
+	DropTargetListView.cpp
 	MimeTypeListView.cpp
 	NewFileTypeWindow.cpp
 	AttributeWindow.cpp