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| -rw-r--r-- | src/extension/implementation/implementation.h | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/src/extension/implementation/implementation.h b/src/extension/implementation/implementation.h new file mode 100644 index 0000000..edd9e72 --- /dev/null +++ b/src/extension/implementation/implementation.h @@ -0,0 +1,208 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + Author: Ted Gould <ted@gould.cx> + Copyright (c) 2003-2005,2007 + + Released under GNU GPL v2+, read the file 'COPYING' for more information. + + This file is the backend to the extensions system. These are + the parts of the system that most users will never see, but are + important for implementing the extensions themselves. This file + contains the base class for all of that. +*/ +#ifndef SEEN_INKSCAPE_EXTENSION_IMPLEMENTATION_H +#define SEEN_INKSCAPE_EXTENSION_IMPLEMENTATION_H + +#include <vector> +#include <sigc++/signal.h> +#include <glibmm/value.h> +#include <2geom/forward.h> + +namespace Gtk { + class Widget; +} + +class SPDocument; +class SPStyle; + +namespace Inkscape { + +namespace UI { +namespace View { +class View; +} +} + +namespace XML { + class Node; +} + +namespace Extension { + +class Effect; +class Extension; +class Input; +class Output; +class Print; + +namespace Implementation { + +/** + * A cache for the document and this implementation. + */ +class ImplementationDocumentCache { + + /** + * The document that this instance is working on. + */ + Inkscape::UI::View::View * _view; +public: + explicit ImplementationDocumentCache (Inkscape::UI::View::View * view) { _view = view;}; + + virtual ~ImplementationDocumentCache ( ) { return; }; + Inkscape::UI::View::View const * view ( ) { return _view; }; +}; + +/** + * Base class for all implementations of modules. This is whether they are done systematically by + * having something like the scripting system, or they are implemented internally they all derive + * from this class. + */ +class Implementation { +public: + // ----- Constructor / destructor ----- + Implementation() = default; + + virtual ~Implementation() = default; + + // ----- Basic functions for all Extension ----- + virtual bool load(Inkscape::Extension::Extension * /*module*/) { return true; } + + virtual void unload(Inkscape::Extension::Extension * /*module*/) {} + + /** + * Create a new document cache object. + * This function just returns \c NULL. Subclasses are likely + * to reimplement it to do something useful. + * @param ext The extension that is referencing us + * @param doc The document to create the cache of + * @return A new document cache that is valid as long as the document + * is not changed. + */ + virtual ImplementationDocumentCache * newDocCache (Inkscape::Extension::Extension * /*ext*/, Inkscape::UI::View::View * /*doc*/) { return nullptr; } + + /** Verify any dependencies. */ + virtual bool check(Inkscape::Extension::Extension * /*module*/) { return true; } + + virtual bool cancelProcessing () { return true; } + virtual void commitDocument () {} + + // ----- Input functions ----- + /** Find out information about the file. */ + virtual Gtk::Widget *prefs_input(Inkscape::Extension::Input *module, + gchar const *filename); + + virtual SPDocument *open(Inkscape::Extension::Input * /*module*/, + gchar const * /*filename*/) { return nullptr; } + + // ----- Output functions ----- + /** Find out information about the file. */ + virtual Gtk::Widget *prefs_output(Inkscape::Extension::Output *module); + virtual void save(Inkscape::Extension::Output * /*module*/, SPDocument * /*doc*/, gchar const * /*filename*/) {} + virtual void export_raster( + Inkscape::Extension::Output * /*module*/, + const SPDocument * /*doc*/, + std::string const &/*png_file*/, + gchar const * /*filename*/) {} + + // ----- Effect functions ----- + /** Find out information about the file. */ + virtual Gtk::Widget * prefs_effect(Inkscape::Extension::Effect *module, + Inkscape::UI::View::View *view, + sigc::signal<void> *changeSignal, + ImplementationDocumentCache *docCache); + virtual void effect(Inkscape::Extension::Effect * /*module*/, + Inkscape::UI::View::View * /*document*/, + ImplementationDocumentCache * /*docCache*/) {} + + // ----- Print functions ----- + virtual unsigned setup(Inkscape::Extension::Print * /*module*/) { return 0; } + virtual unsigned set_preview(Inkscape::Extension::Print * /*module*/) { return 0; } + + virtual unsigned begin(Inkscape::Extension::Print * /*module*/, + SPDocument * /*doc*/) { return 0; } + virtual unsigned finish(Inkscape::Extension::Print * /*module*/) { return 0; } + + /** + * Tell the printing engine whether text should be text or path. + * Default value is false because most printing engines will support + * paths more than they'll support text. (at least they do today) + * \retval true Render the text as a path + * \retval false Render text using the text function (above) + */ + virtual bool textToPath(Inkscape::Extension::Print * /*ext*/) { return false; } + + /** + * Get "fontEmbedded" param, i.e. tell the printing engine whether fonts should be embedded. + * Only available for Adobe Type 1 fonts in EPS output as of now + * \retval true Fonts have to be embedded in the output so that the user might not need + * to install fonts to have the interpreter read the document correctly + * \retval false Do not embed fonts + */ + virtual bool fontEmbedded(Inkscape::Extension::Print * /*ext*/) { return false; } + + // ----- Rendering methods ----- + virtual unsigned bind(Inkscape::Extension::Print * /*module*/, + Geom::Affine const & /*transform*/, + float /*opacity*/) { return 0; } + virtual unsigned release(Inkscape::Extension::Print * /*module*/) { return 0; } + virtual unsigned fill(Inkscape::Extension::Print * /*module*/, + Geom::PathVector const & /*pathv*/, + Geom::Affine const & /*ctm*/, + SPStyle const * /*style*/, + Geom::OptRect const & /*pbox*/, + Geom::OptRect const & /*dbox*/, + Geom::OptRect const & /*bbox*/) { return 0; } + virtual unsigned stroke(Inkscape::Extension::Print * /*module*/, + Geom::PathVector const & /*pathv*/, + Geom::Affine const & /*transform*/, + SPStyle const * /*style*/, + Geom::OptRect const & /*pbox*/, + Geom::OptRect const & /*dbox*/, + Geom::OptRect const & /*bbox*/) { return 0; } + virtual unsigned image(Inkscape::Extension::Print * /*module*/, + unsigned char * /*px*/, + unsigned int /*w*/, + unsigned int /*h*/, + unsigned int /*rs*/, + Geom::Affine const & /*transform*/, + SPStyle const * /*style*/) { return 0; } + virtual unsigned text(Inkscape::Extension::Print * /*module*/, + char const * /*text*/, + Geom::Point const & /*p*/, + SPStyle const * /*style*/) { return 0; } + virtual void processPath(Inkscape::XML::Node * /*node*/) {} + + /** + * If detach = true, when saving to a file, don't store URIs relative to the filename + */ + virtual void setDetachBase(bool detach) {} +}; + + +} // namespace Implementation +} // namespace Extension +} // namespace Inkscape + +#endif // __INKSCAPE_EXTENSION_IMPLEMENTATION_H__ + +/* + 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 : |