file.cpp

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * File operations (independent of GUI)
 *
 * Copyright (C) 2018, 2019 Tavmjong Bah
 *
 * The contents of this file may be used under the GNU General Public License Version 2 or later.
 *
 */
 
#include "io/file.h"
 
#include <iostream>
#include <memory>
#include <unistd.h>
#include <glibmm/fileutils.h>
#include <glibmm/miscutils.h>
#include <giomm/file.h>
 
#include "document.h"
#include "document-undo.h"
#include "extension/system.h"     // Extension::open()
#include "extension/extension.h"
#include "extension/db.h"
#include "extension/output.h"
#include "extension/input.h"
#include "object/sp-root.h"
#include "xml/repr.h"
 
std::unique_ptr<SPDocument> ink_file_new(std::string const &Template)
{
    auto doc = SPDocument::createNewDoc(Template.empty() ? nullptr : Template.c_str(), true, true);
 
    if (!doc) {
        std::cerr << "ink_file_new: Did not create new document!" << std::endl;
        return nullptr;
    }
 
    // Remove all the template info from xml tree
    Inkscape::XML::Node *myRoot = doc->getReprRoot();
    for (auto const name: {"inkscape:templateinfo",
                           "inkscape:_templateinfo"}) // backwards-compatibility
    {
        if (auto node = std::unique_ptr<Inkscape::XML::Node>{sp_repr_lookup_name(myRoot, name)}) {
            Inkscape::DocumentUndo::ScopedInsensitive no_undo(doc.get());
            sp_repr_unparent(node.get());
        }
    }
 
    return doc;
}
 
namespace {
void set_inkscape_and_svg_versions(SPRoot *root)
{
    // This is the only place original values should be set.
    if (root->inkscape.version) {
        root->inkscape.original = *root->inkscape.version;
    }
    if (root->svg.version) {
        root->svg.original = *root->svg.version;
    }
}
} // namespace
 
std::unique_ptr<SPDocument> ink_file_open(std::span<char const> buffer)
{
    auto doc = SPDocument::createNewDocFromMem(buffer, true);
 
    if (!doc) {
        std::cerr << "ink_file_open: cannot open file in memory (pipe?)" << std::endl;
        return nullptr;
    }
    set_inkscape_and_svg_versions(doc->getRoot());
    return doc;
}
 
std::pair<std::unique_ptr<SPDocument>, bool> ink_file_open(Glib::RefPtr<Gio::File> const &file)
{
    std::unique_ptr<SPDocument> doc;
    std::string path = file->get_path();
 
    // TODO: It's useless to catch these exceptions here (and below) unless we do something with them.
    //       If we can't properly handle them (e.g. by showing a user-visible message) don't catch them!
    try {
        doc = Inkscape::Extension::open(nullptr, path.c_str());
    } catch (Inkscape::Extension::Input::no_extension_found const &) {
    } catch (Inkscape::Extension::Input::open_failed const &) {
    } catch (Inkscape::Extension::Input::open_cancelled const &) {
        return {nullptr, true};
    }
 
    // Try to open explicitly as SVG.
    // TODO: Why is this necessary? Shouldn't this be handled by the first call already?
    if (!doc) {
        try {
            doc = Inkscape::Extension::open(Inkscape::Extension::db.get(SP_MODULE_KEY_INPUT_SVG), path.c_str());
        } catch (Inkscape::Extension::Input::no_extension_found const &) {
        } catch (Inkscape::Extension::Input::open_failed const &) {
        } catch (Inkscape::Extension::Input::open_cancelled const &) {
            return {nullptr, true};
        }
    }
 
    if (!doc) {
        std::cerr << "ink_file_open: '" << path << "' cannot be opened!" << std::endl;
        return {nullptr, false};
    }
 
    set_inkscape_and_svg_versions(doc->getRoot());
    return {std::move(doc), false};
}
 
namespace Inkscape::IO {
 
TempFilename::TempFilename(const std::string &pattern)
{
    try {
        _tempfd = Glib::file_open_tmp(_filename, pattern.c_str());
    } catch (...) {
    }
}
  
TempFilename::~TempFilename()
{
    close(_tempfd);
    unlink(_filename.c_str());
}
 
std::string find_original_file(Glib::StdStringView const filepath, Glib::StdStringView const name)
{
    auto path = Glib::path_get_dirname(filepath);
    auto filename = Glib::build_filename(path, name);
    if (Glib::file_test(filename, Glib::FileTest::IS_REGULAR)) {
        return filename;
    }
    return ""; 
}
 
} // namespace Inkscape::IO
 
/*
  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 :