1 files changed, 145 insertions, 0 deletions
diff --git a/src/ui/view/view.h b/src/ui/view/view.h
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+// SPDX-License-Identifier: GPL-2.0-or-later
+#ifndef INKSCAPE_UI_VIEW_VIEW_H
+#define INKSCAPE_UI_VIEW_VIEW_H
+/*
+ * Authors:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *   Ralf Stephan <ralf@ark.in-berlin.de>
+ *
+ * Copyright (C) 2001-2002 Lauris Kaplinski
+ * Copyright (C) 2001 Ximian, Inc.
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <gdk/gdk.h>
+#include <cstddef>
+#include <memory>
+#include <sigc++/connection.h>
+#include "message.h"
+#include "inkgc/gc-managed.h"
+#include "gc-finalized.h"
+#include "gc-anchored.h"
+#include <2geom/forward.h>
+
+/**
+ * Iterates until true or returns false.
+ * When used as signal accumulator, stops emission if one slot returns true.
+ */
+struct StopOnTrue {
+  typedef bool result_type;
+
+  template<typename T_iterator>
+  result_type operator()(T_iterator first, T_iterator last) const{
+      for (; first != last; ++first)
+          if (*first) return true;
+      return false;
+  }
+};
+
+/**
+ * Iterates until nonzero or returns 0.
+ * When used as signal accumulator, stops emission if one slot returns nonzero.
+ */
+struct StopOnNonZero {
+  typedef int result_type;
+
+  template<typename T_iterator>
+  result_type operator()(T_iterator first, T_iterator last) const{
+      for (; first != last; ++first)
+          if (*first) return *first;
+      return 0;
+  }
+};
+
+class SPDocument;
+
+namespace Inkscape {
+    class MessageContext;
+    class MessageStack;
+    namespace UI {
+        namespace View {
+
+/**
+ * View is an abstract base class of all UI document views.  This
+ * includes both the editing window and the SVG preview, but does not
+ * include the non-UI RGBA buffer-based Inkscape::Drawing nor the XML editor or
+ * similar views.  The View base class has very little functionality of
+ * its own.
+ */
+class View : public GC::Managed<>,
+             public GC::Finalized,
+             public GC::Anchored
+{
+public:
+
+    View();
+
+    /**
+     * Deletes and nulls all View message stacks and disconnects it from signals.
+     */
+    ~View() override;
+
+    void close() { _close(); }
+
+    /// Returns a pointer to the view's document.
+    SPDocument *doc() const
+      { return _doc; }
+    /// Returns a pointer to the view's message stack.
+    std::shared_ptr<Inkscape::MessageStack> messageStack() const
+      { return _message_stack; }
+    /// Returns a pointer to the view's tipsMessageContext.
+    Inkscape::MessageContext *tipsMessageContext() const
+      { return _tips_message_context.get(); }
+
+    void emitResized(gdouble width, gdouble height);
+    void requestRedraw();
+
+    virtual void onResized (double, double) {};
+    virtual void onRedrawRequested() {};
+    virtual void onStatusMessage (Inkscape::MessageType type, gchar const *message) {};
+    virtual void onDocumentFilenameSet (gchar const* filename) {};
+
+protected:
+    SPDocument *_doc;
+    std::shared_ptr<Inkscape::MessageStack> _message_stack;
+    std::unique_ptr<Inkscape::MessageContext> _tips_message_context;
+
+    virtual void _close();
+
+    /**
+     * Disconnects the view from the document signals, connects the view 
+     * to a new one, and emits the _document_set_signal on the view.
+     *
+     * This is code common to all subclasses and called from their
+     * setDocument() methods after they are done.
+     * 
+     * @param doc The new document to connect the view to.
+     */
+    virtual void setDocument(SPDocument *doc);
+
+    sigc::signal<void,double,double>   _resized_signal;
+    sigc::signal<void,gchar const*>    _document_filename_set_signal;
+    sigc::signal<void>                 _redraw_requested_signal;
+
+private:
+    sigc::connection _resized_connection;
+    sigc::connection _redraw_requested_connection;
+    sigc::connection _message_changed_connection;  // foreign
+    sigc::connection _document_uri_set_connection; // foreign
+};
+
+}}}
+
+#endif  // INKSCAPE_UI_VIEW_VIEW_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 :