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/*
* Inkscape::ResourceManager - tracks external resources such as image and css files.
*
* Copyright 2011 Jon A. Cruz <jon@joncruz.org>
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include <string>
#include <vector>
#include <glibmm/i18n.h>
#include <glibmm/convert.h>
#include <glibmm/fileutils.h>
#include <glibmm/miscutils.h>
#include <glibmm/uriutils.h>
#include "resource-manager.h"
#include "document.h"
#include "sp-object.h"
#include "xml/node.h"
#include "document-undo.h"
namespace Inkscape {
class ResourceManagerImpl : public ResourceManager {
public:
ResourceManagerImpl();
virtual ~ResourceManagerImpl();
virtual bool fixupBrokenLinks(SPDocument *doc);
/**
* Walk all links in a document and create a listing of unique broken links.
*
* @return a list of all broken links.
*/
std::vector<Glib::ustring> findBrokenLinks(SPDocument *doc);
/**
* Resolve broken links as a whole and return a map for those that can be found.
*
* Note: this will allow for future enhancements including relinking to new locations
* with the most broken files found, etc.
*
* @return a map of found links.
*/
std::map<Glib::ustring, Glib::ustring> locateLinks(Glib::ustring const & docbase, std::vector<Glib::ustring> const & brokenLinks);
bool extractFilepath( Glib::ustring const &href, std::string &uri );
protected:
};
ResourceManagerImpl::ResourceManagerImpl()
: ResourceManager()
{
}
ResourceManagerImpl::~ResourceManagerImpl()
{
}
bool ResourceManagerImpl::extractFilepath( Glib::ustring const &href, std::string &uri )
{
bool isFile = false;
uri.clear();
std::string scheme = Glib::uri_parse_scheme(href);
if ( !scheme.empty() ) {
// TODO debug g_message("Scheme is now [%s]", scheme.c_str());
if ( scheme == "file" ) {
// TODO debug g_message("--- is a file URI [%s]", href.c_str());
// throws Glib::ConvertError:
uri = Glib::filename_from_uri(href); // TODO see if we can get this to throw
// TODO debug g_message(" [%s]", uri.c_str());
isFile = true;
}
} else {
// No scheme. Assuming it is a file path (absolute or relative).
// throws Glib::ConvertError:
uri = Glib::filename_from_utf8( href );
isFile = true;
}
return isFile;
}
std::vector<Glib::ustring> ResourceManagerImpl::findBrokenLinks( SPDocument *doc )
{
std::vector<Glib::ustring> result;
std::set<Glib::ustring> uniques;
if ( doc ) {
GSList const *images = doc->getResourceList("image");
for (GSList const *it = images; it; it = it->next) {
Inkscape::XML::Node *ir = static_cast<SPObject *>(it->data)->getRepr();
gchar const *href = ir->attribute("xlink:href");
if ( href && ( uniques.find(href) == uniques.end() ) ) {
std::string uri;
if ( extractFilepath( href, uri ) ) {
if ( Glib::path_is_absolute(uri) ) {
if ( !Glib::file_test(uri, Glib::FILE_TEST_EXISTS) ) {
result.push_back(href);
uniques.insert(href);
}
} else {
std::string combined = Glib::build_filename(doc->getBase(), uri);
if ( !Glib::file_test(uri, Glib::FILE_TEST_EXISTS) ) {
result.push_back(href);
uniques.insert(href);
}
}
}
}
}
}
return result;
}
std::map<Glib::ustring, Glib::ustring> ResourceManagerImpl::locateLinks(Glib::ustring const & docbase, std::vector<Glib::ustring> const & brokenLinks)
{
std::map<Glib::ustring, Glib::ustring> result;
// At the moment we expect this list to contain file:// references, or simple relative or absolute paths.
for ( std::vector<Glib::ustring>::const_iterator it = brokenLinks.begin(); it != brokenLinks.end(); ++it ) {
// TODO debug g_message("========{%s}", it->c_str());
std::string uri;
if ( extractFilepath( *it, uri ) ) {
// We were able to get some path. Check it
if ( !Glib::path_is_absolute(uri) ) {
uri = Glib::build_filename(docbase, uri);
// TODO debug g_message(" not absolute. Fixing up as [%s]", uri.c_str());
}
if ( !Glib::file_test(uri, Glib::FILE_TEST_EXISTS) ) {
// TODO debug g_message(" DOES NOT EXIST.");
std::string tmp = uri;
std::string prior;
std::string remainder;
bool exists = false;
while ( (tmp != prior) && !exists) {
prior = tmp;
std::string basename = Glib::path_get_basename(tmp);
tmp = Glib::path_get_dirname(tmp);
if ( remainder.empty() ) {
remainder = basename;
} else {
remainder = Glib::build_filename(basename, remainder);
}
std::string rebuild = Glib::build_filename(docbase, remainder);
exists = Glib::file_test(rebuild, Glib::FILE_TEST_EXISTS);
// TODO debug g_message(" [%s] [%s]%s", tmp.c_str(), remainder.c_str(), exists ? " XXXX" : "");
if ( exists ) {
Glib::ustring replacement = Glib::filename_to_utf8( remainder );
result[*it] = replacement;
}
}
}
}
}
return result;
}
bool ResourceManagerImpl::fixupBrokenLinks(SPDocument *doc)
{
bool changed = false;
if ( doc ) {
// TODO debug g_message("FIXUP FIXUP FIXUP FIXUP FIXUP FIXUP FIXUP FIXUP FIXUP FIXUP");
// TODO debug g_message(" base is [%s]", doc->getBase());
std::vector<Glib::ustring> brokenHrefs = findBrokenLinks(doc);
if ( !brokenHrefs.empty() ) {
// TODO debug g_message(" FOUND SOME LINKS %d", brokenHrefs.size());
for ( std::vector<Glib::ustring>::iterator it = brokenHrefs.begin(); it != brokenHrefs.end(); ++it ) {
// TODO debug g_message(" [%s]", it->c_str());
}
}
std::map<Glib::ustring, Glib::ustring> mapping = locateLinks(doc->getBase(), brokenHrefs);
for ( std::map<Glib::ustring, Glib::ustring>::iterator it = mapping.begin(); it != mapping.end(); ++it )
{
// TODO debug g_message(" [%s] ==> {%s}", it->first.c_str(), it->second.c_str());
}
bool savedUndoState = DocumentUndo::getUndoSensitive(doc);
DocumentUndo::setUndoSensitive(doc, true);
GSList const *images = doc->getResourceList("image");
for (GSList const *it = images; it; it = it->next) {
Inkscape::XML::Node *ir = static_cast<SPObject *>(it->data)->getRepr();
gchar const *href = ir->attribute("xlink:href");
if ( href ) {
// TODO debug g_message(" consider [%s]", href);
if ( mapping.find(href) != mapping.end() ) {
// TODO debug g_message(" Found a replacement");
ir->setAttribute( "xlink:href", mapping[href].c_str() );
if ( ir->attribute( "sodipodi:absref" ) ) {
ir->setAttribute( "sodipodi:absref", 0 ); // Remove this attribute
}
SPObject *updated = doc->getObjectByRepr(ir);
if (updated) {
// force immediate update of dependant attributes
updated->updateRepr();
}
changed = true;
}
}
}
if ( changed ) {
DocumentUndo::done( doc, SP_VERB_DIALOG_XML_EDITOR, _("Fixup broken links") );
}
DocumentUndo::setUndoSensitive(doc, savedUndoState);
}
return changed;
}
static ResourceManagerImpl* theInstance = 0;
ResourceManager::ResourceManager()
: Glib::Object()
{
}
ResourceManager::~ResourceManager() {
}
ResourceManager& ResourceManager::getManager() {
if ( !theInstance ) {
theInstance = new ResourceManagerImpl();
}
return *theInstance;
}
} // namespace Inkscape
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :
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