Handle be:line and °K in RefsReceived, store it in file attributes

This work was done during GCI2012

Fixes #4794

Signed-off-by: Siarzhuk Zharski <zharik@gmx.li>

src/apps/stylededit/Constants.h

@@ -81,6 +81,7 @@ const uint32 SAVE_THEN_QUIT				= 'FPsq';
 // Update StatusView
 const uint32 UPDATE_STATUS				= 'UPSt';
 const uint32 UNLOCK_FILE				= 'UNLk';
+const uint32 UPDATE_LINE_SEL			= 'UPls';
 
 #endif	// CONSTANTS_H
 

src/apps/stylededit/StyledEditApp.cpp

@@ -178,7 +178,7 @@ StyledEditApp::OpenDocument()
 
 
 status_t
-StyledEditApp::OpenDocument(entry_ref* ref)
+StyledEditApp::OpenDocument(entry_ref* ref, BMessage* message)
 {
 	// traverse eventual symlink
 	BEntry entry(ref, true);
@@ -217,13 +217,19 @@ StyledEditApp::OpenDocument(entry_ref* ref)
 			if (document->Lock()) {
 				document->Activate();
 				document->Unlock();
+				if (message != NULL)
+					document->PostMessage(message);
 				return B_OK;
 			}
 		}
 	}
 
 	cascade();
-	new StyledEditWindow(gWindowRect, ref, fOpenAsEncoding);
+	document = new StyledEditWindow(gWindowRect, ref, fOpenAsEncoding);
+
+	if (message != NULL)
+		document->PostMessage(message);
+
 	fWindowCount++;
 
 	return B_OK;
@@ -248,8 +254,31 @@ StyledEditApp::RefsReceived(BMessage* message)
 	int32 index = 0;
 	entry_ref ref;
 
-	while (message->FindRef("refs", index++, &ref) == B_OK) {
+	while (message->FindRef("refs", index, &ref) == B_OK) {
-		OpenDocument(&ref);
+		int32 line;
+		if (message->FindInt32("be:line", index, &line) != B_OK)
+			line = -1;
+		int32 start, length;
+		if (message->FindInt32("be:selection_length", index, &length) != B_OK
+			|| message->FindInt32("be:selection_offset", index, &start) != B_OK)
+		{
+			start = -1;
+			length = -1;
+		}
+
+		BMessage* selMessage = NULL;
+		if (line >= 0 || (start >= 0 && length >= 0)) {
+			selMessage = new BMessage(UPDATE_LINE_SEL);
+			if (line >= 0)
+				selMessage->AddInt32("be:line", line);
+			if (start >= 0) {
+				selMessage->AddInt32("be:selection_offset", start);
+				selMessage->AddInt32("be:selection_length", max_c(0, length));
+			}
+		}
+
+		OpenDocument(&ref, selMessage);
+		index++;
 	}
 }
 
@@ -309,7 +338,7 @@ StyledEditApp::ReadyToRun()
 int32
 StyledEditApp::NumberOfWindows()
 {
- 	return fWindowCount;
+	return fWindowCount;
 }
 
 

src/apps/stylededit/StyledEditApp.h

@@ -36,7 +36,8 @@ public:
 
 			int32				NumberOfWindows();
 			void				OpenDocument();
-			status_t			OpenDocument(entry_ref* ref);
+			status_t			OpenDocument(entry_ref* ref,
+									BMessage* message = NULL);
 			void				CloseDocument();
 
 private:

src/apps/stylededit/StyledEditWindow.cpp

@@ -535,6 +535,24 @@ StyledEditWindow::MessageReceived(BMessage* message)
 			break;
 		}
 
+		case UPDATE_LINE_SEL:
+		{
+			int32 line;
+			if (message->FindInt32("be:line", &line) == B_OK) {
+				fTextView->GoToLine(line);
+				fTextView->ScrollToSelection();
+			}
+
+			int32 start, length;
+			if (message->FindInt32("be:selection_offset", &start) == B_OK) {
+				if (message->FindInt32("be:selection_length", &length) != B_OK)
+					length = 0;
+
+				fTextView->Select(start, start + length);
+				fTextView->ScrollToOffset(start);
+			}
+			break;
+		}
 		default:
 			BWindow::MessageReceived(message);
 			break;
@@ -867,7 +885,6 @@ StyledEditWindow::OpenFile(entry_ref* ref)
 
 	fReloadItem->SetEnabled(fSaveMessage != NULL);
 	fEncodingItem->SetEnabled(fSaveMessage != NULL);
-	fTextView->Select(0, 0);
 }
 
 
@@ -1318,6 +1335,33 @@ StyledEditWindow::_LoadAttrs()
 		MoveTo(newFrame.left, newFrame.top);
 		ResizeTo(newFrame.Width(), newFrame.Height());
 	}
+
+	// info about position of caret may live in the file attributes
+	int32 line = 0;
+	int32 lineMax = fTextView->CountLines();
+	if (documentNode.ReadAttr("be:line",
+			B_INT32_TYPE, 0, &line, sizeof(line)) == sizeof(line))
+		line = min_c(max_c(0, line), lineMax);
+	else
+		line = 0;
+
+	int32 start = 0, length = 0, finish = 0;
+	int32 offsetMax = fTextView->OffsetAt(lineMax);
+	if (documentNode.ReadAttr("be:selection_offset",
+			B_INT32_TYPE, 0, &start, sizeof(start)) == sizeof(start)
+		&& documentNode.ReadAttr("be:selection_length",
+			B_INT32_TYPE, 0, &length, sizeof(length)) == sizeof(length))
+	{
+		finish = start + length;
+		start = min_c(max_c(0, start), offsetMax);
+		finish = min_c(max_c(0, finish), offsetMax);
+	} else {
+		start = fTextView->OffsetAt(line);
+		finish = start;
+	}
+
+	fTextView->Select(start, finish);
+	fTextView->ScrollToOffset(start);
 }
 
 
@@ -1345,6 +1389,18 @@ StyledEditWindow::_SaveAttrs()
 
 	documentNode.WriteAttr(kInfoAttributeName, B_RECT_TYPE, 0, &frame,
 		sizeof(BRect));
+
+	// preserve current line and selection too
+	int32 line = fTextView->CurrentLine();
+	documentNode.WriteAttr("be:line", B_INT32_TYPE, 0, &line, sizeof(line));
+
+	int32 start, end;
+	fTextView->GetSelection(&start, &end);
+	int32 length = end - start;
+	documentNode.WriteAttr("be:selection_offset",
+			B_INT32_TYPE, 0, &start, sizeof(start));
+	documentNode.WriteAttr("be:selection_length",
+			B_INT32_TYPE, 0, &length, sizeof(length));
 }