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Factor out the list of macro definitions for InsetPreview.

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This will be soon reused in InsetText to generate images for DocBook.
This commit is contained in:
Thibaut Cuvelier 2021-10-08 03:14:18 +02:00
parent 48a507694e
commit 46b8101800
3 changed files with 38 additions and 24 deletions
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4
src/DocIterator.h
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@ -28,8 +28,8 @@ class MathAtom;
class Paragraph;
class Text;
DocIterator doc_iterator_begin(Buffer const * buf, Inset const * inset = 0);
DocIterator doc_iterator_end(Buffer const * buf, Inset const * inset = 0);
DocIterator doc_iterator_begin(Buffer const * buf, Inset const * inset = nullptr);
DocIterator doc_iterator_end(Buffer const * buf, Inset const * inset = nullptr);
class DocIterator

53
src/insets/InsetPreview.cpp
View File

@ -79,6 +79,34 @@ void InsetPreview::addPreview(DocIterator const & inset_pos,
}
MacroNameSet gatherMacroDefinitions(const Buffer* buffer, const Inset * inset)
{
// Collect macros for this inset.
// Not done yet: this function returns a list of macro *definitions*.
MacroNameSet macros;
buffer->listMacroNames(macros);
// Look for math insets and collect definitions for the used macros.
MacroNameSet defs;
DocIterator const dbeg = doc_iterator_begin(buffer, inset);
DocIterator dit = dbeg;
DocIterator const dend = doc_iterator_end(buffer, inset);
if (!dit.nextInset())
dit.forwardInset();
for (; dit != dend; dit.forwardInset()) {
InsetMath * im = dit.nextInset()->asInsetMath();
InsetMathHull * hull = im ? im->asHullInset() : nullptr;
if (!hull)
continue;
for (idx_type idx = 0; idx < hull->nargs(); ++idx)
hull->usedMacros(hull->cell(idx), dbeg, macros, defs);
}
return defs;
}
void InsetPreview::preparePreview(DocIterator const & pos) const
{
odocstringstream str;
@ -86,29 +114,10 @@ void InsetPreview::preparePreview(DocIterator const & pos) const
OutputParams runparams(&pos.buffer()->params().encoding());
latex(os, runparams);
// collect macros at this position
MacroNameSet macros;
pos.buffer()->listMacroNames(macros);
// look for math insets and collect definitions for the used macros
MacroNameSet defs;
DocIterator dit = doc_iterator_begin(pos.buffer(), this);
DocIterator const dend = doc_iterator_end(pos.buffer(), this);
if (!dit.nextInset())
dit.forwardInset();
for (; dit != dend; dit.forwardInset()) {
InsetMath * im = dit.nextInset()->asInsetMath();
InsetMathHull * hull = im ? im->asHullInset() : nullptr;
if (!hull)
continue;
for (idx_type idx = 0; idx < hull->nargs(); ++idx)
hull->usedMacros(hull->cell(idx), pos, macros, defs);
}
MacroNameSet::iterator it = defs.begin();
MacroNameSet::iterator end = defs.end();
MacroNameSet defs = gatherMacroDefinitions(pos.buffer(), this);
docstring macro_preamble;
for (; it != end; ++it)
macro_preamble.append(*it);
for (const auto& def : defs)
macro_preamble.append(def);
docstring const snippet = macro_preamble + str.str();
preview_->addPreview(snippet, *pos.buffer());

5
src/insets/InsetPreview.h
View File

@ -20,6 +20,7 @@
namespace lyx {
class Dimension;
class MacroNameSet;
class RenderPreview;
namespace graphics {
@ -87,6 +88,10 @@ protected:
};
/// gathers the list of macro definitions used in the given inset
MacroNameSet gatherMacroDefinitions(const Buffer* buffer, const Inset * inset);
} // namespace lyx