Remove cached var from RenderPreview. Changes elsewhere to suit.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@8669 a592a061-630c-0410-9148-cb99ea01b6c8

lib/ChangeLog

@@ -1,3 +1,8 @@
+2004-04-19  Angus Leeming  <leeming@lyx.org>
+
+	* scripts/lyxpreview2bitmap.py (extract_metrics_info): make the
+	regex a little more robust. Now recognizes negative integers.
+
 2004-04-15  Angus Leeming  <leeming@lyx.org>
 
 	* scripts/lyxpreview2bitmap.sh: removed.

lib/scripts/lyxpreview2bitmap.py

@@ -102,7 +102,7 @@ def make_texcolor(hexcolor):
 
 def extract_metrics_info(dvipng_stdout, metrics_file):
     metrics = open(metrics_file, 'w')
-    metrics_re = re.compile("\[([0-9]+) depth=([0-9]+) height=([0-9]+)\]")
+    metrics_re = re.compile("\[([0-9]+) depth=(-?[0-9]+) height=(-?[0-9]+)")
 
     success = 0
     pos = 0

src/insets/ChangeLog

@@ -1,3 +1,18 @@
+2004-04-19  Angus Leeming  <leeming@lyx.org>
+
+	* insetexternal.C (priv_dispatch): remove unnecessary invocation of
+	BufferView::update.
+	(add_preview): renamed as add_preview_and_start_loading. Invoke
+	RenderPreview::startLoading.
+
+	* insetinclude.C (metrics, draw): changes due to the changed
+	RenderPreview interface.
+
+	* render_preview.C: remove cached pimage_.
+	(previewReady): removed. Replaced by getPreviewImage(Buffer const &).
+	(draw): don't call startLoading. That's up to the user of
+	RenderPreview.
+
 2004-04-16  Angus Leeming  <leeming@lyx.org>
 
 	* render_graphic.h (checksum_, hasFileChanged): unused, so removed.

src/insets/insetexternal.C

@@ -449,8 +449,6 @@ void InsetExternal::priv_dispatch(LCursor & cur, FuncRequest & cmd)
 		InsetExternalParams p;
 		InsetExternalMailer::string2params(cmd.argument, buffer, p);
 		setParams(p, buffer);
-#warning is this needed?
-		cur.bv().update();
 		break;
 	}
 
@@ -567,7 +565,9 @@ string const getScreenLabel(InsetExternalParams const & params,
 	return external::doSubstitution(params, buffer, ptr->guiName);
 }
 
-void add_preview(RenderMonitoredPreview &, InsetExternal const &, Buffer const &);
+void add_preview_and_start_loading(RenderMonitoredPreview &,
+				   InsetExternal const &,
+				   Buffer const &);
 
 } // namespace anon
 
@@ -621,7 +621,7 @@ void InsetExternal::setParams(InsetExternalParams const & p,
 
 		if (preview_ptr->monitoring())
 			preview_ptr->stopMonitoring();
-		add_preview(*preview_ptr, *this, buffer);
+		add_preview_and_start_loading(*preview_ptr, *this, buffer);
 
 		break;
 	}
@@ -640,8 +640,7 @@ void InsetExternal::fileChanged() const
 
 	Buffer const & buffer = *buffer_ptr;
 	ptr->removePreview(buffer);
-	add_preview(*ptr, *this, buffer);
+	add_preview_and_start_loading(*ptr, *this, buffer);
-	ptr->startLoading(buffer);
 }
 
 
@@ -774,14 +773,18 @@ string const latex_string(InsetExternal const & inset, Buffer const & buffer)
 }
 
 
-void add_preview(RenderMonitoredPreview & renderer, InsetExternal const & inset,
+void add_preview_and_start_loading(RenderMonitoredPreview & renderer,
-		 Buffer const & buffer)
+				   InsetExternal const & inset,
+				   Buffer const & buffer)
 {
 	InsetExternalParams const & params = inset.params();
-	if (RenderPreview::activated() && preview_wanted(params)) {
+
+	if (RenderPreview::activated() &&
+	    preview_wanted(params)) {
 		renderer.setAbsFile(params.filename.absFilename());
 		string const snippet = latex_string(inset, buffer);
 		renderer.addPreview(snippet, buffer);
+		renderer.startLoading(buffer);
 	}
 }
 

src/insets/insetinclude.C

@@ -32,6 +32,7 @@
 #include "frontends/LyXView.h"
 #include "frontends/Painter.h"
 
+#include "graphics/PreviewImage.h"
 #include "graphics/PreviewLoader.h"
 
 #include "insets/render_preview.h"
@@ -568,7 +569,16 @@ void InsetInclude::fillWithBibKeys(Buffer const & buffer,
 
 void InsetInclude::metrics(MetricsInfo & mi, Dimension & dim) const
 {
-	if (RenderPreview::activated() && preview_->previewReady()) {
+	BOOST_ASSERT(mi.base.bv && mi.base.bv->buffer());
+
+	bool use_preview = false;
+	if (RenderPreview::activated()) {
+		lyx::graphics::PreviewImage const * pimage =
+			preview_->getPreviewImage(*mi.base.bv->buffer());
+		use_preview = pimage && pimage->image();
+	}
+
+	if (use_preview) {
 		preview_->metrics(mi, dim);
 	} else {
 		if (!set_label_) {
@@ -592,12 +602,19 @@ void InsetInclude::draw(PainterInfo & pi, int x, int y) const
 {
 	setPosCache(pi, x, y);
 
-	if (!RenderPreview::activated() || !preview_->previewReady()) {
+	BOOST_ASSERT(pi.base.bv && pi.base.bv->buffer());
-		button_.draw(pi, x + button_.box().x1, y);
+
-		return;
+	bool use_preview = false;
+	if (RenderPreview::activated()) {
+		lyx::graphics::PreviewImage const * pimage =
+			preview_->getPreviewImage(*pi.base.bv->buffer());
+		use_preview = pimage && pimage->image();
 	}
 
-	preview_->draw(pi, x + button_.box().x1, y);
+	if (use_preview)
+		preview_->draw(pi, x + button_.box().x1, y);
+	else
+		button_.draw(pi, x + button_.box().x1, y);
 }
 
 

src/insets/render_preview.C

@@ -14,6 +14,7 @@
 #include "insets/inset.h"
 
 #include "BufferView.h"
+#include "debug.h"
 #include "dimension.h"
 #include "gettext.h"
 #include "LColor.h"
@@ -45,8 +46,7 @@ bool RenderPreview::activated()
 
 
 RenderPreview::RenderPreview(InsetBase const * inset)
-	: pimage_(0),
+	: parent_(inset)
-	  parent_(inset)
 {}
 
 
@@ -55,7 +55,6 @@ RenderPreview::RenderPreview(RenderPreview const & other,
 	: RenderBase(other),
 	  boost::signals::trackable(),
 	  snippet_(other.snippet_),
-	  pimage_(0),
 	  parent_(inset)
 {}
 
@@ -97,12 +96,26 @@ string const statusMessage(BufferView const * bv, string const & snippet)
 } // namespace anon
 
 
+graphics::PreviewImage const *
+RenderPreview::getPreviewImage(Buffer const & buffer) const
+{
+	graphics::Previews & previews = graphics::Previews::get();
+	graphics::PreviewLoader & loader = previews.loader(buffer);
+	return loader.preview(snippet_);
+}
+ 
+
 void RenderPreview::metrics(MetricsInfo & mi, Dimension & dim) const
 {
-	if (previewReady()) {
+        BOOST_ASSERT(mi.base.bv && mi.base.bv->buffer());
-		dim.asc = pimage_->ascent();
+
-		dim.des = pimage_->descent();
+	graphics::PreviewImage const * const pimage =
-		dim.wid = pimage_->width();
+		getPreviewImage(*mi.base.bv->buffer());
+
+	if (pimage) {
+		dim.asc = pimage->ascent();
+		dim.des = pimage->descent();
+		dim.wid = pimage->width();
 	} else {
 		dim.asc = 50;
 		dim.des = 0;
@@ -121,13 +134,14 @@ void RenderPreview::metrics(MetricsInfo & mi, Dimension & dim) const
 
 void RenderPreview::draw(PainterInfo & pi, int x, int y) const
 {
-	BOOST_ASSERT(pi.base.bv && pi.base.bv->buffer());
+        BOOST_ASSERT(pi.base.bv && pi.base.bv->buffer());
-	Buffer const & buffer = *pi.base.bv->buffer();
-	startLoading(buffer);
 
-	if (previewReady()) {
+	graphics::PreviewImage const * const pimage =
+		getPreviewImage(*pi.base.bv->buffer());
+
+	if (pimage && pimage->image()) {
 		pi.pain.image(x, y - dim_.asc, dim_.wid, dim_.height(),
-			      *(pimage_->image()));
+			      *(pimage->image()));
 		return;
 	}
 
@@ -154,6 +168,7 @@ void RenderPreview::startLoading(Buffer const & buffer) const
 	graphics::Previews & previews = graphics::Previews::get();
 	graphics::PreviewLoader & loader = previews.loader(buffer);
 	loader.startLoading();
+	lyxerr << "RenderPreview::startLoading: " << snippet_ << std::endl;
 }
 
 
@@ -176,12 +191,10 @@ void RenderPreview::addPreview(string const & latex_snippet,
 		return;
 
 	snippet_ = support::trim(latex_snippet);
-	pimage_ = 0;
 	if (snippet_.empty())
 		return;
 
-	pimage_ = ploader.preview(snippet_);
+	if (ploader.preview(snippet_))
-	if (pimage_)
 		return;
 
 	// If this is the first time of calling, connect to the
@@ -205,24 +218,14 @@ void RenderPreview::removePreview(Buffer const & buffer)
 	graphics::PreviewLoader & loader = previews.loader(buffer);
 	loader.remove(snippet_);
 	snippet_.erase();
-	pimage_ = 0;
-}
-
-
-bool RenderPreview::previewReady() const
-{
-	return pimage_ ? pimage_->image() : false;
 }
 
 
 void RenderPreview::imageReady(graphics::PreviewImage const & pimage)
 {
 	// Check the current snippet is the same as that previewed.
-	if (snippet_ != pimage.snippet())
+	if (snippet_ == pimage.snippet())
-		return;
+		LyX::cref().updateInset(parent_);
-
-	pimage_ = &pimage;
-	LyX::cref().updateInset(parent_);
 }
 
 

src/insets/render_preview.h

@@ -72,8 +72,11 @@ public:
 	 */
 	void removePreview(Buffer const &);
 
-	/// The preview has been generated and is ready to use.
+	/** \returns a pointer to the PreviewImage associated with this snippet
-	bool previewReady() const;
+	 *  of latex.
+	 */
+	lyx::graphics::PreviewImage const *
+	getPreviewImage(Buffer const & buffer) const;
 
 	/// equivalent to dynamic_cast
 	virtual RenderPreview * asPreview() { return this; }
@@ -88,9 +91,6 @@ private:
 	/// The thing that we're trying to generate a preview of.
 	std::string snippet_;
 
-	/// We don't own this. Cached for efficiency reasons.
-	lyx::graphics::PreviewImage const * pimage_;
-
 	/** Store the connection to the preview loader so that we connect
 	 *  only once.
 	 */

src/mathed/ChangeLog

@@ -1,3 +1,8 @@
+2004-04-19  Angus Leeming  <leeming@lyx.org>
+
+	* math_hullinset.C (metrics, draw): changes due to the changed
+	RenderPreview interface.
+
 2004-04-13  Angus Leeming  <leeming@lyx.org>
 
 	* math_hullinset.[Ch]: add a RenderPreview variable.

src/mathed/math_hullinset.C

@@ -37,6 +37,7 @@
 
 #include "frontends/Alert.h"
 
+#include "graphics/PreviewImage.h"
 #include "graphics/PreviewLoader.h"
 
 #include "support/std_sstream.h"
@@ -228,9 +229,14 @@ char const * MathHullInset::standardFont() const
 
 void MathHullInset::metrics(MetricsInfo & mi, Dimension & dim) const
 {
-	bool const use_preview = (!editing(mi.base.bv) &&
+	BOOST_ASSERT(mi.base.bv && mi.base.bv->buffer());
-				  RenderPreview::activated() &&
+
-				  preview_->previewReady());
+	bool use_preview = false;
+	if (!editing(mi.base.bv) && RenderPreview::activated()) {
+		lyx::graphics::PreviewImage const * pimage =
+			preview_->getPreviewImage(*mi.base.bv->buffer());
+		use_preview = pimage && pimage->image();
+	}
 
 	if (use_preview) {
 		preview_->metrics(mi, dim);
@@ -276,10 +282,14 @@ void MathHullInset::metrics(MetricsInfo & mi, Dimension & dim) const
 
 void MathHullInset::draw(PainterInfo & pi, int x, int y) const
 {
-	// The previews are drawn only when we're not editing the inset.
+	BOOST_ASSERT(pi.base.bv && pi.base.bv->buffer());
-	bool const use_preview = (!editing(pi.base.bv) &&
+
-				  RenderPreview::activated() &&
+	bool use_preview = false;
-				  preview_->previewReady());
+	if (!editing(pi.base.bv) && RenderPreview::activated()) {
+		lyx::graphics::PreviewImage const * pimage =
+			preview_->getPreviewImage(*pi.base.bv->buffer());
+		use_preview = pimage && pimage->image();
+	}
 
 	if (use_preview) {
 		// one pixel gap in front