Don't use the cached BufferView to get the Buffer when we have direct access

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@7886 a592a061-630c-0410-9148-cb99ea01b6c8

src/graphics/ChangeLog

@@ -1,3 +1,9 @@
+2003-10-09  Angus Leeming  <leeming@lyx.org>
+
+	* PreviewedInset.[Ch] (removePreview, previewReady): these functions
+	are now passed a 'Buffer const &', eliminating most of the remaining
+	need for PreviewedInset to use a BufferView cache.
+
 2003-10-07  Martin Vermeer  <martin.vermeer@hut.fi>
 
 	* GraphicsCache.h: 

src/graphics/PreviewedInset.C

@@ -75,8 +75,8 @@ void PreviewedInset::addPreview(PreviewLoader & ploader)
 	// If this is the first time of calling, connect to the
 	// PreviewLoader signal that'll inform us when the preview image
 	// is ready for loading.
-	if (!connection_.connected()) {
-		connection_ = ploader.connect(
+	if (!ploader_connection_.connected()) {
+		ploader_connection_ = ploader.connect(
 			boost::bind(&PreviewedInset::imageReady, this, _1));
 	}
 
@@ -84,43 +84,36 @@ void PreviewedInset::addPreview(PreviewLoader & ploader)
 }
 
 
-void PreviewedInset::removePreview()
+void PreviewedInset::removePreview(Buffer const & buffer)
 {
-	if (!view() || !view()->buffer() || snippet_.empty())
+	if (snippet_.empty())
 		return;
 
 	Previews & previews = Previews::get();
-	PreviewLoader & loader = previews.loader(*view()->buffer());
+	PreviewLoader & loader = previews.loader(buffer);
 	loader.remove(snippet_);
 	snippet_.erase();
 	pimage_ = 0;
 }
 
 
-bool PreviewedInset::previewReady() const
+bool PreviewedInset::previewReady(Buffer const & buffer) const
 {
-	if (!Previews::activated() || !view() || !view()->buffer())
-		return false;
-
-	if (!previewWanted(*view()->buffer()))
+	if (!Previews::activated() || !previewWanted(buffer))
 		return false;
 
 	if (!pimage_ || snippet_ != pimage_->snippet()) {
-		PreviewLoader & ploader =
-			Previews::get().loader(*view()->buffer());
+		PreviewLoader & ploader = Previews::get().loader(buffer);
 		pimage_ = ploader.preview(snippet_);
 	}
 
-	if (!pimage_)
-		return false;
-
-	return pimage_->image();
+	return pimage_ ? pimage_->image() : false;
 }
 
 
 void PreviewedInset::imageReady(PreviewImage const & pimage) const
 {
-	// Check snippet against the Inset's current contents
+	// Check the current snippet is the same as that previewed.
 	if (snippet_ != pimage.snippet())
 		return;
 

src/graphics/PreviewedInset.h

@@ -51,10 +51,10 @@ public:
 	/** Remove a snippet from the cache of previews.
 	 *  Useful if previewing the contents of a file that has changed.
 	 */
-	void removePreview();
+	void removePreview(Buffer const &);
 
 	/// The preview has been generated and is ready to use.
-	bool previewReady() const;
+	bool previewReady(Buffer const &) const;
 
 	/// If !previewReady() returns 0.
 	PreviewImage const * pimage() const;
@@ -83,8 +83,10 @@ private:
 
 	/// We don't own this. Cached for efficiency reasons.
 	mutable PreviewImage const * pimage_;
-	///
-	boost::signals::connection connection_;
+	/** Store the connection to the preview loader so that we connect
+	 *  only once.
+	 */
+	boost::signals::connection ploader_connection_;
 };
 
 

src/insets/ChangeLog

@@ -1,3 +1,7 @@
+2003-10-09  Angus Leeming  <leeming@lyx.org>
+
+	* insetinclude.C (metrics, draw, restartLoading): pass a buffer arg
+	to PreviewedInset's previewReady and removePreview member functions.
 
 2003-10-08  André Pönitz  <poenitz@gmx.net>
 

src/insets/insetinclude.C

@@ -538,7 +538,8 @@ void InsetInclude::fillWithBibKeys(Buffer const & buffer,
 
 void InsetInclude::metrics(MetricsInfo & mi, Dimension & dim) const
 {
-	if (preview_->previewReady()) {
+	Buffer const * buffer_ptr = mi.base.bv ? mi.base.bv->buffer() : 0;
+	if (buffer_ptr && preview_->previewReady(*buffer_ptr)) {
 		dim.asc = preview_->pimage()->ascent();
 		dim.des = preview_->pimage()->descent();
 		dim.wid = preview_->pimage()->width();
@@ -563,7 +564,10 @@ void InsetInclude::metrics(MetricsInfo & mi, Dimension & dim) const
 void InsetInclude::draw(PainterInfo & pi, int x, int y) const
 {
 	cache(pi.base.bv);
-	if (!preview_->previewReady()) {
+	Buffer const * buffer_ptr = pi.base.bv ? pi.base.bv->buffer() : 0;
+	bool const use_preview = buffer_ptr && preview_->previewReady(*buffer_ptr);
+
+	if (!use_preview) {
 		button_.draw(pi, x + button_.box().x1, y);
 		return;
 	}
@@ -626,12 +630,14 @@ void InsetInclude::PreviewImpl::startMonitoring(string const & file)
 
 void InsetInclude::PreviewImpl::restartLoading()
 {
-	removePreview();
 	if (!view())
 		return;
 	view()->updateInset(&parent());
-	if (view()->buffer())
-		generatePreview(*view()->buffer());
+	if (view()->buffer()) {
+		Buffer const & buffer = *view()->buffer();
+		removePreview(buffer);
+		generatePreview(buffer);
+	}
 }
 
 

src/mathed/ChangeLog

@@ -1,3 +1,7 @@
+2003-10-09  Angus Leeming  <leeming@lyx.org>
+
+	* formula.C (metrics, draw): pass a buffer arg to PreviewedInset's
+	previewReady and removePreview member functions.
 
 2003-10-07  André Pönitz  <poenitz@gmx.net>
 

src/mathed/formula.C

@@ -18,6 +18,7 @@
 #include "math_mathmlstream.h"
 #include "textpainter.h"
 
+#include "BufferView.h"
 #include "debug.h"
 #include "latexrunparams.h"
 #include "LColor.h"
@@ -195,7 +196,8 @@ void InsetFormula::draw(PainterInfo & pi, int x, int y) const
 	cache(pi.base.bv);
 	// This initiates the loading of the preview, so should come
 	// before the metrics are computed.
-	bool const use_preview = preview_->previewReady();
+	Buffer const * buffer_ptr = pi.base.bv ? pi.base.bv->buffer() : 0;
+	bool const use_preview = buffer_ptr && preview_->previewReady(*buffer_ptr);
 
 	int const w = dim_.wid;
 	int const d = dim_.des;
@@ -260,7 +262,8 @@ bool InsetFormula::insetAllowed(InsetOld::Code code) const
 void InsetFormula::metrics(MetricsInfo & m, Dimension & dim) const
 {
 	view_ = m.base.bv;
-	if (preview_->previewReady()) {
+	Buffer const * buffer_ptr = m.base.bv ? m.base.bv->buffer() : 0;
+	if (buffer_ptr && preview_->previewReady(*buffer_ptr)) {
 		dim.asc = preview_->pimage()->ascent();
 		dim.des = preview_->pimage()->descent();
 		// insert a one pixel gap in front of the formula