Use screen point for caret that includes virtual spcace so that, for

example, the IME appears near the caret when the caret is in virtual space.
Changed LocationFromPosition to work on a SelectionPosition and
added convenience method for finding screen point of main caret.

3 files changed, 22 insertions, 11 deletions

diff --git a/src/Editor.cxx b/src/Editor.cxx
index 7af0e7325..0958d8076 100644
--- a/src/Editor.cxx
+++ b/src/Editor.cxx
@@ -355,12 +355,12 @@ SelectionPosition Editor::ClampPositionIntoDocument(SelectionPosition sp) const
 	}
 }
 
-Point Editor::LocationFromPosition(int pos) {
+Point Editor::LocationFromPosition(SelectionPosition pos) {
 	Point pt;
 	RefreshStyleData();
-	if (pos == INVALID_POSITION)
+	if (pos.Position() == INVALID_POSITION)
 		return pt;
-	int line = pdoc->LineFromPosition(pos);
+	int line = pdoc->LineFromPosition(pos.Position());
 	int lineVisible = cs.DisplayFromDoc(line);
 	//Platform::DebugPrintf("line=%d\n", line);
 	AutoSurface surface(this);
@@ -371,7 +371,7 @@ Point Editor::LocationFromPosition(int pos) {
 		pt.x = 0;
 		unsigned int posLineStart = pdoc->LineStart(line);
 		LayoutLine(line, surface, vs, ll, wrapWidth);
-		int posInLine = pos - posLineStart;
+		int posInLine = pos.Position() - posLineStart;
 		// In case of very long line put x at arbitrary large position
 		if (posInLine > ll->maxLineLength) {
 			pt.x = ll->positions[ll->maxLineLength] - ll->positions[ll->LineStart(ll->lines)];
@@ -392,17 +392,22 @@ Point Editor::LocationFromPosition(int pos) {
 		}
 		pt.x += vs.fixedColumnWidth - xOffset;
 	}
+	pt.x += pos.VirtualSpace() * vs.spaceWidth;
 	return pt;
 }
 
+Point Editor::LocationFromPosition(int pos) {
+	return LocationFromPosition(SelectionPosition(pos));
+}
+
 int Editor::XFromPosition(int pos) {
 	Point pt = LocationFromPosition(pos);
 	return pt.x - vs.fixedColumnWidth + xOffset;
 }
 
 int Editor::XFromPosition(SelectionPosition sp) {
-	Point pt = LocationFromPosition(sp.Position());
-	return pt.x + sp.VirtualSpace() * vs.spaceWidth - vs.fixedColumnWidth + xOffset;
+	Point pt = LocationFromPosition(sp);
+	return pt.x - vs.fixedColumnWidth + xOffset;
 }
 
 int Editor::LineFromLocation(Point pt) {
@@ -896,12 +901,16 @@ SelectionPosition Editor::MovePositionSoVisible(int pos, int moveDir) {
 	return MovePositionSoVisible(SelectionPosition(pos), moveDir);
 }
 
+Point Editor::PointMainCaret() {
+	return LocationFromPosition(sel.Range(sel.Main()).caret);
+}
+
 /**
  * Choose the x position that the caret will try to stick to
  * as it moves up and down.
  */
 void Editor::SetLastXChosen() {
-	Point pt = LocationFromPosition(sel.MainCaret());
+	Point pt = PointMainCaret();
 	lastXChosen = pt.x;
 }
 
@@ -946,7 +955,7 @@ void Editor::HorizontalScrollTo(int xPos) {
 
 void Editor::MoveCaretInsideView(bool ensureVisible) {
 	PRectangle rcClient = GetTextRectangle();
-	Point pt = LocationFromPosition(sel.MainCaret());
+	Point pt = PointMainCaret();
 	if (pt.y < rcClient.top) {
 		MovePositionTo(SPositionFromLocation(
 		            Point(lastXChosen, rcClient.top)),
@@ -4521,7 +4530,7 @@ void Editor::NewLine() {
 }
 
 void Editor::CursorUpOrDown(int direction, Selection::selTypes selt) {
-	Point pt = LocationFromPosition(sel.MainCaret());
+	Point pt = PointMainCaret();
 	int lineDoc = pdoc->LineFromPosition(sel.MainCaret());
 	Point ptStartLine = LocationFromPosition(pdoc->LineStart(lineDoc));
 	int subLine = (pt.y - ptStartLine.y) / vs.lineHeight;
diff --git a/src/Editor.h b/src/Editor.h
index ab1e9a1e8..68580fdaa 100644
--- a/src/Editor.h
+++ b/src/Editor.h
@@ -258,6 +258,7 @@ protected:	// ScintillaBase subclass needs access to much of Editor
 	int LinesToScroll();
 	int MaxScrollPos();
 	SelectionPosition ClampPositionIntoDocument(SelectionPosition sp) const;
+	Point LocationFromPosition(SelectionPosition pos);
 	Point LocationFromPosition(int pos);
 	int XFromPosition(int pos);
 	int XFromPosition(SelectionPosition sp);
@@ -295,6 +296,7 @@ protected:	// ScintillaBase subclass needs access to much of Editor
 	int MovePositionTo(int newPos, Selection::selTypes sel=Selection::noSel, bool ensureVisible=true);
 	SelectionPosition MovePositionSoVisible(SelectionPosition pos, int moveDir);
 	SelectionPosition MovePositionSoVisible(int pos, int moveDir);
+	Point PointMainCaret();
 	void SetLastXChosen();
 
 	void ScrollTo(int line, bool moveThumb=true);
diff --git a/src/ScintillaBase.cxx b/src/ScintillaBase.cxx
index b47986ff0..0a8912c7b 100644
--- a/src/ScintillaBase.cxx
+++ b/src/ScintillaBase.cxx
@@ -226,7 +226,7 @@ void ScintillaBase::AutoCompleteStart(int lenEntered, const char *list) {
 			return;
 		}
 	}
-	ac.Start(wMain, idAutoComplete, sel.MainCaret(), LocationFromPosition(sel.MainCaret()),
+	ac.Start(wMain, idAutoComplete, sel.MainCaret(), PointMainCaret(),
 				lenEntered, vs.lineHeight, IsUnicodeMode());
 
 	PRectangle rcClient = GetClientRectangle();
@@ -240,7 +240,7 @@ void ScintillaBase::AutoCompleteStart(int lenEntered, const char *list) {
 	if (pt.x >= rcClient.right - widthLB) {
 		HorizontalScrollTo(xOffset + pt.x - rcClient.right + widthLB);
 		Redraw();
-		pt = LocationFromPosition(sel.MainCaret());
+		pt = PointMainCaret();
 	}
 	PRectangle rcac;
 	rcac.left = pt.x - ac.lb->CaretFromEdge();