Vincent's initial support for ERT instant preview

[features.git] / src / insets / InsetERT.cpp

diff --git a/src/insets/InsetERT.cpp b/src/insets/InsetERT.cpp
index d1e15bae8b806ddf27e1a9a8203a66d24a2baa09..80b3af3890b0d0025f454424c7aff5cfdc1c210d 100644 (file)
--- a/src/insets/InsetERT.cpp
+++ b/src/insets/InsetERT.cpp
@@ -23,6 +23,7 @@
 #include "Language.h"
 #include "Layout.h"
 #include "Lexer.h"
+#include "LyXRC.h"
 #include "LyXAction.h"
 #include "MetricsInfo.h"
 #include "OutputParams.h"
@@ -30,6 +31,10 @@
 #include "Paragraph.h"
 #include "TextClass.h"
 
+#include "graphics/PreviewImage.h"
+
+#include "insets/RenderPreview.h"
+
 #include "frontends/alert.h"
 #include "frontends/Application.h"
 
@@ -45,12 +50,29 @@ using namespace lyx::support;
 namespace lyx {
 
 InsetERT::InsetERT(Buffer * buf, CollapseStatus status)
-       : InsetCollapsable(buf)
+       : InsetCollapsable(buf), preview_(new RenderPreview(this))
 {
        status_ = status;
 }
 
 
+InsetERT::InsetERT(InsetERT const & other) : InsetCollapsable(other)
+{
+       operator=(other);
+}
+
+InsetERT & InsetERT::operator=(InsetERT const & other)
+{
+       if (this == &other)
+               return *this;
+       InsetCollapsable::operator=(other);
+       buffer_ = other.buffer_;
+       preview_.reset(new RenderPreview(*other.preview_, this));
+
+       return *this;
+}
+
+
 InsetERT::~InsetERT()
 {
        hideDialogs("ert", this);
@@ -189,4 +211,89 @@ docstring InsetERT::xhtml(XHTMLStream &, OutputParams const &) const
        return docstring();
 }
 
+
+bool InsetERT::previewState(BufferView * bv) const
+{
+       if (!editing(bv) && RenderPreview::status() == LyXRC::PREVIEW_ON) {
+               graphics::PreviewImage const * pimage =
+                       preview_->getPreviewImage(bv->buffer());
+               return pimage && pimage->image();
+       }
+       return false;
+}
+
+
+void InsetERT::addPreview(DocIterator const & inset_pos,
+       graphics::PreviewLoader & ploader) const
+{
+       preparePreview(inset_pos);
+}
+
+
+void InsetERT::preparePreview(DocIterator const & pos) const  
+{
+       odocstringstream str;  
+       OutputParams runparams(&pos.buffer()->params().encoding());
+       latex(str, runparams);
+       docstring const snippet = str.str();
+       LYXERR(Debug::MACROS, "Preview snippet: " << snippet);  
+       preview_->addPreview(snippet, *pos.buffer());  
+}
+
+
+void InsetERT::reloadPreview(DocIterator const & pos) const
+{
+       preparePreview(pos);
+       preview_->startLoading(*pos.buffer());
+}
+
+
+bool InsetERT::notifyCursorLeaves(Cursor const & old, Cursor & cur)
+{
+       reloadPreview(old);
+       cur.updateFlags(Update::Force);
+       return InsetCollapsable::notifyCursorLeaves(old, cur);
+}
+
+
+void InsetERT::draw(PainterInfo & pi, int x, int y) const
+{
+       use_preview_ = previewState(pi.base.bv);
+
+       if (use_preview_) {
+               // one pixel gap in front
+               preview_->draw(pi, x + 1, y);
+               setPosCache(pi, x, y);
+               return;
+       }
+       InsetCollapsable::draw(pi, x, y);
+}
+
+
+Inset * InsetERT::editXY(Cursor & cur, int x, int y)
+{
+       if (use_preview_) {
+               edit(cur, true);
+               return this;
+       }
+       return InsetCollapsable::editXY(cur, x, y);
+}
+
+
+void InsetERT::metrics(MetricsInfo & mi, Dimension & dim) const
+{
+       if (previewState(mi.base.bv)) {
+               preview_->metrics(mi, dim);
+               // insert a one pixel gap in front of the formula
+               dim.wid += 1;
+               // Cache the inset dimension.
+               setDimCache(mi, dim);
+               Dimension dim_dummy = dim;
+               MetricsInfo mi_dummy = mi;
+               InsetCollapsable::metrics(mi_dummy, dim_dummy);
+               return;
+       }
+       InsetCollapsable::metrics(mi, dim);
+}
+
 } // namespace lyx