Get rid of use_preview_ in various insets

This concerns InsetPreview, InsetIPA and InsetMathHull.

Caching such a value is bad when opening the same buffer in two views.
In this case, it is not necessary to remember use_preview_ at all,
actually.

Also remove private member dim_ which is not used and remove some trailing whitespace.

Fixes bugs #9085 abd #9957.

src/insets/InsetIPA.cpp

@@ -36,7 +36,7 @@ namespace lyx {
 
 InsetIPA::InsetIPA(Buffer * buf) 
 	: InsetText(buf),
-	  preview_(new RenderPreview(this)), use_preview_(true)
+	  preview_(new RenderPreview(this))
 {
 	setDrawFrame(true);
 	setFrameColor(Color_insetframe);
@@ -150,9 +150,7 @@ void InsetIPA::reloadPreview(DocIterator const & pos) const
 
 void InsetIPA::draw(PainterInfo & pi, int x, int y) const
 {
-	use_preview_ = previewState(pi.base.bv);
+	if (previewState(pi.base.bv)) {
-
-	if (use_preview_) {
 		preview_->draw(pi, x + TEXT_TO_INSET_OFFSET, y);
 		setPosCache(pi, x, y);
 		return;
@@ -170,7 +168,7 @@ void InsetIPA::edit(Cursor & cur, bool front, EntryDirection entry_from)
 
 Inset * InsetIPA::editXY(Cursor & cur, int x, int y)
 {
-	if (use_preview_) {
+	if (previewState(&cur.bv())) {
 		edit(cur, true, ENTRY_DIRECTION_IGNORE);
 		return this;
 	}
@@ -191,7 +189,6 @@ void InsetIPA::metrics(MetricsInfo & mi, Dimension & dim) const
 		dim.asc += TEXT_TO_INSET_OFFSET;
 		dim.des += TEXT_TO_INSET_OFFSET;
 		dim.wid += TEXT_TO_INSET_OFFSET;
-		dim_ = dim;
 		dim.wid += TEXT_TO_INSET_OFFSET;
 		// insert a one pixel gap
 		dim.wid += 1;

src/insets/InsetIPA.h

@@ -94,12 +94,6 @@ protected:
 
 	///
 	boost::scoped_ptr<RenderPreview> preview_;
-	///
-	mutable bool use_preview_;
-
-private:
-	///
-	mutable Dimension dim_;
 };
 
 

src/insets/InsetPreview.cpp

@@ -34,16 +34,15 @@ using namespace std;
 namespace lyx {
 
 
-InsetPreview::InsetPreview(Buffer * buf) 
+InsetPreview::InsetPreview(Buffer * buf)
-	: InsetText(buf),
+	: InsetText(buf), preview_(new RenderPreview(this))
-	  preview_(new RenderPreview(this)), use_preview_(true)
 {
 	setDrawFrame(true);
 	setFrameColor(Color_previewframe);
 }
 
 
-InsetPreview::~InsetPreview() 
+InsetPreview::~InsetPreview()
 {}
 
 
@@ -80,7 +79,7 @@ void InsetPreview::addPreview(DocIterator const & inset_pos,
 }
 
 
-void InsetPreview::preparePreview(DocIterator const & pos) const  
+void InsetPreview::preparePreview(DocIterator const & pos) const
 {
 	TexRow texrow;
 	odocstringstream str;
@@ -137,15 +136,12 @@ void InsetPreview::reloadPreview(DocIterator const & pos) const
 
 void InsetPreview::draw(PainterInfo & pi, int x, int y) const
 {
-	use_preview_ = previewState(pi.base.bv);
+	if (previewState(pi.base.bv)) {
-
-	if (use_preview_) {
 		// one pixel gap in front
 		preview_->draw(pi, x + 1 + TEXT_TO_INSET_OFFSET, y);
 		setPosCache(pi, x, y);
-		return;
+	} else
-	}
+		InsetText::draw(pi, x, y);
-	InsetText::draw(pi, x, y);
 }
 
 
@@ -158,7 +154,7 @@ void InsetPreview::edit(Cursor & cur, bool front, EntryDirection entry_from)
 
 Inset * InsetPreview::editXY(Cursor & cur, int x, int y)
 {
-	if (use_preview_) {
+	if (previewState(&cur.bv())) {
 		edit(cur, true, ENTRY_DIRECTION_IGNORE);
 		return this;
 	}
@@ -172,14 +168,13 @@ void InsetPreview::metrics(MetricsInfo & mi, Dimension & dim) const
 	if (previewState(mi.base.bv)) {
 		preview_->metrics(mi, dim);
 		mi.base.textwidth += 2 * TEXT_TO_INSET_OFFSET;
-		
+
 		dim.wid = max(dim.wid, 4);
 		dim.asc = max(dim.asc, 4);
-		
+
 		dim.asc += TEXT_TO_INSET_OFFSET;
 		dim.des += TEXT_TO_INSET_OFFSET;
 		dim.wid += TEXT_TO_INSET_OFFSET;
-		dim_ = dim;
 		dim.wid += TEXT_TO_INSET_OFFSET;
 		// insert a one pixel gap
 		dim.wid += 1;

src/insets/InsetPreview.h

@@ -81,12 +81,7 @@ protected:
 
 	///
 	boost::scoped_ptr<RenderPreview> preview_;
-	///
-	mutable bool use_preview_;
 
-private:
-	///
-	mutable Dimension dim_;
 };
 
 

src/mathed/InsetMathHull.cpp

@@ -158,7 +158,7 @@ static InsetLabel * dummy_pointer = 0;
 InsetMathHull::InsetMathHull(Buffer * buf)
 	: InsetMathGrid(buf, 1, 1), type_(hullNone), numbered_(1, NUMBER),
 	  numbers_(1, empty_docstring()), label_(1, dummy_pointer),
-	  preview_(new RenderPreview(this)), use_preview_(false)
+	  preview_(new RenderPreview(this))
 {
 	//lyxerr << "sizeof InsetMath: " << sizeof(InsetMath) << endl;
 	//lyxerr << "sizeof MetricsInfo: " << sizeof(MetricsInfo) << endl;
@@ -173,7 +173,7 @@ InsetMathHull::InsetMathHull(Buffer * buf)
 InsetMathHull::InsetMathHull(Buffer * buf, HullType type)
 	: InsetMathGrid(buf, getCols(type), 1), type_(type), numbered_(1, NUMBER),
 	  numbers_(1, empty_docstring()), label_(1, dummy_pointer),
-	  preview_(new RenderPreview(this)), use_preview_(false)
+	  preview_(new RenderPreview(this))
 {
 	buffer_ = buf;
 	initMath();
@@ -316,7 +316,7 @@ void InsetMathHull::addToToc(DocIterator const & pit, bool output_active,
 
 Inset * InsetMathHull::editXY(Cursor & cur, int x, int y)
 {
-	if (use_preview_) {
+	if (previewState(&cur.bv())) {
 		edit(cur, true);
 		return this;
 	}
@@ -526,7 +526,6 @@ void InsetMathHull::drawBackground(PainterInfo & pi, int x, int y) const
 void InsetMathHull::draw(PainterInfo & pi, int x, int y) const
 {
 	BufferView const * const bv = pi.base.bv;
-	use_preview_ = previewState(bv);
 
 	if (type_ == hullRegexp) {
 		Dimension const dim = dimension(*bv);
@@ -534,7 +533,7 @@ void InsetMathHull::draw(PainterInfo & pi, int x, int y) const
 			dim.width() - 2, dim.height() - 2, Color_regexpframe);
 	}
 
-	if (use_preview_) {
+	if (previewState(bv)) {
 		Dimension const dim = dimension(*bv);
 		if (previewTooSmall(dim)) {
 			// we have an extra frame

src/mathed/InsetMathHull.h

@@ -256,8 +256,6 @@ private:
 	///
 	boost::scoped_ptr<RenderPreview> preview_;
 	///
-	mutable bool use_preview_;
-	///
 	DocIterator docit_;
 	///
 	typedef std::map<docstring, int> CounterMap;