From 42a2a0f289e951cc7fd4f6ef25a286f3ef400497 Mon Sep 17 00:00:00 2001
From: Richard Heck <rgheck@comcast.net>
Date: Tue, 9 Mar 2010 03:25:47 +0000
Subject: [PATCH] Cheap fix for #6554. When we save a Buffer to a new location,
 we check the included insets and make sure that the files they reference are
 still where they are supposed to be.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@33686 a592a061-630c-0410-9148-cb99ea01b6c8
---
 src/Buffer.cpp                | 37 +++++++++++++++++++++++++++++++++++
 src/Buffer.h                  |  2 ++
 src/frontends/qt4/GuiView.cpp |  6 ++++++
 3 files changed, 45 insertions(+)

diff --git a/src/Buffer.cpp b/src/Buffer.cpp
index 8f3355b6b7..9a3d86af66 100644
--- a/src/Buffer.cpp
+++ b/src/Buffer.cpp
@@ -3920,4 +3920,41 @@ bool Buffer::reload()
 }
 
 
+// FIXME We could do better here, but it is complicated. What would be
+// nice is to offer either (a) to save the child buffer to an appropriate
+// location, so that it would "move with the master", or else (b) to update
+// the InsetInclude so that it pointed to the same file. But (a) is a bit
+// complicated, because the code for this lives in GuiView.
+void Buffer::checkChildBuffers()
+{
+	Impl::BufferPositionMap::iterator it = d->children_positions.begin();
+	Impl::BufferPositionMap::iterator const en = d->children_positions.end();
+	for (; it != en; ++it) {
+		DocIterator dit = it->second;
+		Buffer * cbuf = const_cast<Buffer *>(it->first);
+		if (!cbuf || !theBufferList().isLoaded(cbuf))
+			continue;
+		Inset * inset = dit.nextInset();
+		LASSERT(inset && inset->lyxCode() == INCLUDE_CODE, continue);
+		InsetInclude * inset_inc = static_cast<InsetInclude *>(inset);
+		docstring const & incfile = inset_inc->getParam("filename");
+		string oldloc = cbuf->absFileName();
+		string newloc = makeAbsPath(to_utf8(incfile),
+				onlyPath(absFileName())).absFilename();
+		if (oldloc == newloc)
+			continue;
+		// the location of the child file is incorrect.
+		Alert::warning(_("Included File Invalid"),
+				bformat(_("Saving this document to a new location has made the file:\n"
+				"  %1$s\n"
+				"inaccessible. You will need to update the included filename."),
+				from_utf8(oldloc)));
+		cbuf->setParent(0);
+		inset_inc->setChildBuffer(0);
+	}
+	// invalidate cache of children
+	d->children_positions.clear();
+	d->position_to_children.clear();
+}
+
 } // namespace lyx
diff --git a/src/Buffer.h b/src/Buffer.h
index 4e372c296d..7f19fd1f58 100644
--- a/src/Buffer.h
+++ b/src/Buffer.h
@@ -561,6 +561,8 @@ public:
 	/// \return progress if a new word was found.
 	int spellCheck(DocIterator & from, DocIterator & to,
 		WordLangTuple & word_lang, docstring_list & suggestions) const;
+	///
+	void checkChildBuffers();
 
 private:
 	///
diff --git a/src/frontends/qt4/GuiView.cpp b/src/frontends/qt4/GuiView.cpp
index b8b8d2cd99..a2a5eaf746 100644
--- a/src/frontends/qt4/GuiView.cpp
+++ b/src/frontends/qt4/GuiView.cpp
@@ -2083,6 +2083,7 @@ bool GuiView::renameBuffer(Buffer & b, docstring const & newname)
 			fname.changeExtension(".lyx");
 	}
 
+	// fname is now the new Buffer location.
 	if (FileName(fname).exists()) {
 		docstring const file = makeDisplayPath(fname.absFilename(), 30);
 		docstring text = bformat(_("The document %1$s already "
@@ -2119,6 +2120,11 @@ bool GuiView::renameBuffer(Buffer & b, docstring const & newname)
 		return false;
 	}
 
+	// the file has now been saved to the new location.
+	// we need to check that the locations of child buffers
+	// are still valid.
+	b.checkChildBuffers();
+
 	return true;
 }