Implemented BTextView::SetText(BFile *.... etc.)

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@8038 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kits/interface/BTextView/TextGapBuffer.cpp

@@ -29,11 +29,12 @@
 #include <cstring>
 
 // System Includes -------------------------------------------------------------
-#include "TextGapBuffer.h"
+#include <File.h>
 
 // Project Includes ------------------------------------------------------------
 
 // Local Includes --------------------------------------------------------------
+#include "TextGapBuffer.h"
 
 // Local Defines ---------------------------------------------------------------
 
@@ -84,6 +85,41 @@ _BTextGapBuffer_::InsertText(const char *inText, int32 inNumItems,
 }
 //------------------------------------------------------------------------------
 void
+_BTextGapBuffer_::InsertText(BFile *file, int32 fileOffset, int32 inNumItems, int32 inAtIndex)
+{
+	off_t fileSize;
+
+	if (file->GetSize(&fileSize) != B_OK
+		|| !file->IsReadable())
+		return;
+	
+	// Clamp the text length to the file size
+	fileSize -= fileOffset;
+
+	if (fileSize < inNumItems)
+		inNumItems = fileSize;
+
+	if (inNumItems < 1)
+		return;
+
+	inAtIndex = (inAtIndex > fItemCount) ? fItemCount : inAtIndex;
+	inAtIndex = (inAtIndex < 0) ? 0 : inAtIndex;
+		
+	if (inAtIndex != fGapIndex)
+		MoveGapTo(inAtIndex);
+	
+	if (fGapCount < inNumItems)
+		SizeGapTo(inNumItems + fExtraCount);
+	
+	// Finally, read the data and put it into the buffer
+	if (file->ReadAt(fileOffset, fBuffer + fGapIndex, inNumItems) > 0) {
+		fGapCount -= inNumItems;
+		fGapIndex += inNumItems;
+		fItemCount += inNumItems;
+	}
+}
+//------------------------------------------------------------------------------
+void
 _BTextGapBuffer_::RemoveRange(int32 start, int32 end)
 {
 	long inAtIndex = start;

src/kits/interface/BTextView/TextGapBuffer.h

@@ -39,6 +39,7 @@
 
 // Globals ---------------------------------------------------------------------
 
+class BFile;
 // _BTextGapBuffer_ class ------------------------------------------------------
 class _BTextGapBuffer_ {
 
@@ -47,6 +48,7 @@ public:
 virtual				~_BTextGapBuffer_();
 
 		void		InsertText(const char *inText, int32 inNumItems, int32 inAtIndex);
+		void		InsertText(BFile *file, int32 fileOffset, int32 amount, int32 atIndex);
 		void		RemoveRange(int32 start, int32 end);
 		
 		void		MoveGapTo(int32 toIndex);

src/kits/interface/BTextView/TextView.cpp

@@ -951,11 +951,42 @@ BTextView::SetText(const char *inText, int32 inLength,
 }
 //------------------------------------------------------------------------------
 void
-BTextView::SetText(BFile *inFile, int32 startOffset, int32 inLength,
+BTextView::SetText(BFile *inFile, int32 inOffset, int32 inLength,
 						 const text_run_array *inRuns)
 {
 	CALLED();
-	// TODO:
+	//	TODO: Should probably call _DoDeleteText() here
+	if (fText->Length() > 0)
+		DeleteText(0, fText->Length());
+
+	fText->InsertText(inFile, inOffset, inLength, 0);
+	
+	// update the start offsets of each line below offset
+	fLines->BumpOffset(inLength, LineAt(inOffset) + 1);
+	
+	// update the style runs
+	fStyles->BumpOffset(inLength, fStyles->OffsetToRun(inOffset - 1) + 1);
+	
+	if (inRuns != NULL)
+		//SetStyleRange(inOffset, inOffset + inLength, inStyles, false);
+		SetRunArray(inOffset, inOffset + inLength, inRuns);
+	else {
+		// apply nullStyle to inserted text
+		fStyles->SyncNullStyle(inOffset);
+		fStyles->SetStyleRange(inOffset, inOffset + inLength, 
+							  fText->Length(), doAll, NULL, NULL);
+	}
+
+	fSelStart = fSelEnd = 0;	
+
+	// recalc line breaks and draw the text
+	Refresh(0, inLength, true, true);
+
+	// draw the caret
+	if (fActive) {
+		if (!fCaretVisible)
+			InvertCaret();
+	}
 }
 //------------------------------------------------------------------------------
 void