DtMmdb: move to lib directory as a standalone library.

2022-01-13 00:15:14 +08:00
parent f3baea9faa
commit e93b2bc626
589 changed files with 31 additions and 2985 deletions
--- a/cde/lib/DtMmdb/StyleSheet/Renderer.h
+++ b/cde/lib/DtMmdb/StyleSheet/Renderer.h
@@ -0,0 +1,140 @@
+/*
+ * CDE - Common Desktop Environment
+ *
+ * Copyright (c) 1993-2012, The Open Group. All rights reserved.
+ *
+ * These libraries and programs are free software; you can
+ * redistribute them and/or modify them under the terms of the GNU
+ * Lesser General Public License as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * These libraries and programs are distributed in the hope that
+ * they will be useful, but WITHOUT ANY WARRANTY; without even the
+ * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE. See the GNU Lesser General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with these libraries and programs; if not, write
+ * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
+ * Floor, Boston, MA 02110-1301 USA
+ */
+/* $XConsortium: Renderer.h /main/3 1996/06/11 17:08:07 cde-hal $ */
+
+#ifndef _Renderer_h
+#define _Renderer_h 1
+
+#include "Feature.h"
+#include "dti_excs/Exceptions.hh"
+
+/* **************************************************************
+ * class Renderer
+ 
+   the Renderer is responsible for taking the style sheet features
+   matched with an ELEMENT and using them to guide the drawing of the
+   ELEMENT data on the page
+   ************************************************************** */
+
+/* **************************************************************
+   The symbol table supplied is common to the Node Parser,
+   Style Sheet parser and the Renderer.
+ * ************************************************************** */
+
+//class FeatureSet;
+
+class Renderer : public Destructable
+{
+public:
+  Renderer() {};
+  virtual ~Renderer() {};
+
+  virtual FeatureSet *initialize() = 0;	/* return default feature set */
+
+  /* -------- Begin Element -------- */
+  /* ************************************************************
+   * called when a new ELEMENT is found in the document
+   * FeatureSet is set of features and values that match with the
+   * ELEMENT as described in the style sheet 
+   * ************************************************************ */
+
+  /* returns a non-zero value if element is to be ignored */
+
+  virtual unsigned int
+    BeginElement(const Element       &element,
+		 const FeatureSet    &featureset,
+		 const FeatureSet    &complete,
+		 const FeatureSet    &parentComplete) = 0;
+
+
+  /* -------- Data -------- */
+  /* ************************************************************
+   * ELEMENT data passed in (usually text to be displayed)
+   * embedded ELEMENT children are passed in with BeginElement...
+   * ************************************************************ */
+
+  virtual void
+    data(const char *data, unsigned int size) = 0;
+
+
+  /* -------- End Element -------- */
+  /* ************************************************************
+   * End of ELEMENT processing (eg. postfixes, reset pointers etc.)
+   * ************************************************************ */
+
+  virtual void
+    EndElement(const Symbol &element_name) = 0 ;
+
+  /* ************************************************************
+   * Called BEFORE any data processing begins
+   * ************************************************************ */
+
+  virtual void Begin() = 0;
+
+/* **************************************************************
+ * called after all data has been processed
+ * ************************************************************** */
+
+  virtual void End() = 0;
+
+
+  // These two functions allow a renderer to set up internal variable table.
+ 
+/* **************************************************************
+ * pass a variable and a Expression to the renderer and let it decide
+ * whether to accept the variable and the Expression and put them into
+ * the internal variable table.
+ *
+ * non zero return value means that it has been entered into the internal
+ * table 
+ *
+ * If gRenderer is set to null while style sheet is parsed, the 
+ * accept() function will not be called from style.y.
+ * ************************************************************** */
+  virtual unsigned int accept(const char*, const Expression*) { return 0 ;}
+
+  /* ************************************************************
+   *
+   * evaluate the variable to a FeatureValue
+   *
+   * If gRenderer is set to null while the renderer is running, the 
+   * evaluate() function will not be called. 
+   * ************************************************************ */
+  virtual FeatureValue* evaluate(const char*) { return 0 ; }
+
+/* **************************************************************
+ * notifies renderer that the local feature set will be evaluated.
+ * ************************************************************** */
+  virtual void preEvaluate(const Element &) {}
+
+/* **************************************************************
+ * notifies renderer that the local feature set has been evaluated.
+ * ************************************************************** */
+  virtual void postEvaluate(const Element &) {}
+
+
+protected:
+};
+
+#endif
+