Fluid: fix class prefix user input check.

fluid/io/Project_Reader.cxx

@@ -320,11 +320,10 @@ Node *Project_Reader::read_children(Node *p, int merge, Strategy strategy, char
 
     c = read_word(1);
     // There can actually be two keywords here. The first one used to be a
-    // "prefix" in Fluid < 1.5.0, but is no longer supported. So if we still
-    // find the prefix in files, it will simply be prefixed to the name.
+    // "prefix", i.e. class attributes.
     if (strcmp(c,"{") && t->is_class()) {   // <prefix> <name>
-      std::string tmp = std::string {t->name() } + " " + c;
-      t->name(tmp.c_str());
+      ((Class_Node*)t)->prefix( t->name() );
+      t->name( c );
       c = read_word(1);
     }
 

fluid/nodes/Function_Node.cxx

@@ -1514,8 +1514,7 @@ Class_Node Class_Node::prototype;
 Class_Node::Class_Node() :
   Node(),
   subclass_of(nullptr),
-  public_(1),
-  class_prefix(nullptr)
+  public_(1)
 { }
 
 /**
@@ -1524,8 +1523,6 @@ Class_Node::Class_Node() :
 Class_Node::~Class_Node() {
   if (subclass_of)
     free((void*)subclass_of);
-  if (class_prefix)
-    free((void*)class_prefix);
 }
 
 /**
@@ -1535,14 +1532,6 @@ int Class_Node::is_public() const {
   return public_;
 }
 
-/**
- Set the prefixx string.
- */
-void Class_Node::prefix(const char*p) {
-  free((void*) class_prefix);
-  class_prefix=fl_strdup(p ? p : "" );
-}
-
 /**
  Make a new class node.
  \param[in] strategy add after current or as last child
@@ -1559,7 +1548,7 @@ Node *Class_Node::make(Strategy strategy) {
   }
   Class_Node *o = new Class_Node();
   o->name("UserInterface");
-  o->class_prefix = nullptr;
+  o->prefix("");
   o->subclass_of = nullptr;
   o->public_ = 1;
   o->add(anchor, strategy);
@@ -1615,8 +1604,8 @@ void Class_Node::write_code1(fld::io::Code_Writer& f) {
   write_public_state = 0;
   f.write_h("\n");
   write_comment_h(f);
-  if (prefix() && strlen(prefix()))
-    f.write_h("class %s %s ", prefix(), name());
+  if (!prefix().empty())
+    f.write_h("class %s %s ", prefix().c_str(), name());
   else
     f.write_h("class %s ", name());
   if (subclass_of) f.write_h(": %s ", subclass_of);

fluid/nodes/Function_Node.h

@@ -34,6 +34,8 @@
 #include <stdarg.h>
 #include <stdlib.h>
 
+#include <string>
+
 extern class Class_Node *current_class;
 
 int has_toplevel_function(const char *rtype, const char *sig);
@@ -271,7 +273,7 @@ public:
 private:
   const char* subclass_of;
   char public_;
-  const char* class_prefix;
+  std::string prefix_;
 public:
   Class_Node();
   ~Class_Node();
@@ -298,8 +300,10 @@ public:
   void visibility(char v) { public_ = v; }
 
   // class prefix attribute access
-  void prefix(const char* p);
-  const char*  prefix() const {return class_prefix;}
+  /** Set the text between `class` and the class name */
+  void prefix(const std::string& p) { prefix_ = p; }
+  /** Get the text between `class` and the class name */
+  std::string prefix() const { return prefix_; }
 };
 
 #endif // FLUID_NODES_FUNCTION_NODE_H

fluid/nodes/Node.cxx

@@ -889,9 +889,9 @@ void Node::write(fld::io::Project_Writer &f) {
   f.write_word(type_name());
 
   if (is_class()) {
-    const char * p =  ((Class_Node*)this)->prefix();
-    if (p &&  strlen(p))
-      f.write_word(p);
+    auto p = ((Class_Node*)this)->prefix();
+    if (!p.empty())
+      f.write_word(p.c_str());
   }
 
   f.write_word(name());

fluid/panels/widget_panel.cxx

@@ -31,6 +31,7 @@
 #include <FL/fl_ask.H>
 #include <FL/Fl_Menu_Item.H>
 #include <FL/Fl_File_Chooser.H>
+#include <ctype.h>
 #define ZERO_ENTRY 1000
 extern const char* when_symbol_name(int n);
 extern void set_whenmenu(int n);
@@ -2636,11 +2637,10 @@ static void cb_Attribute(Fl_Input* o, void* v) {
   Class_Node* nd = (Class_Node*)current_node;
 
   if (v == LOAD) {
-    o->value( nd->prefix() );
+    o->value( nd->prefix().c_str() );
   } else {
-    const char *nn = nd->prefix();
-    if (   ( nn && (strcmp(nn, o->value()) != 0))
-        || (!nn && (strcmp("", o->value()) != 0)) )
+    auto nn = nd->prefix();
+    if (nn != o->value())
     {
       nd->prefix( o->value() );
       Fluid.proj.set_modflag(1);
@@ -2657,13 +2657,37 @@ static void cb_Class(Fl_Input* o, void* v) {
     o->value( nd->name() );
   } else {
     const char *nn = nd->name();
-    if (   ( nn && (strcmp(nn, o->value()) != 0))
-        || (!nn && (strcmp("", o->value()) != 0)) )
+    char *nv = strdup( o->value() );
+    // There is an inconsistency in the project file reader, so this string
+    // must not coantain anything but alphanumeric and underscore characters.
+    char *s = (char*)nv;
+    char *d = (char*)nv;
+    while (*s) {
+      if (isalnum((unsigned char)*s) || *s == '_') {
+        *d++ = *s;
+      }
+      s++;
+    }
+    *d = 0;
+    // The class name must not be empty either
+    if (*nv == 0) {
+      free((void*)nv);
+      nv = strdup("MyClass");
+    }
+    // The class name may have changed, so update the widget
+    o->value( nv );
+    // Now copy the new name into the node if it changed
+    if (   ( nn && (strcmp(nn, nv) != 0))
+        || (!nn && (strcmp("", nv) != 0)) )
     {
-      nd->name( o->value() );
+      nd->name( nv );
       Fluid.proj.set_modflag(1);
       redraw_browser();
     }
+    // Don't forget to clean up
+    if (nv) {
+      free((void*)nv);
+    }
   }
 }
 
@@ -3239,6 +3263,7 @@ Fl_Double_Window* make_widget_panel() {
         widget_tabs->labelcolor(FL_BACKGROUND2_COLOR);
         widget_tabs->callback((Fl_Callback*)cb_widget_tabs);
         widget_tabs->when(FL_WHEN_NEVER);
+        widget_tabs->hide();
         { wp_gui_tab = new Fl_Group(10, 30, 400, 330, "GUI");
           wp_gui_tab->labelsize(11);
           wp_gui_tab->callback((Fl_Callback*)propagate_load);
@@ -4326,7 +4351,6 @@ Fl_Double_Window* make_widget_panel() {
         class_tabs->labelsize(11);
         class_tabs->labelcolor(FL_WHITE);
         class_tabs->callback((Fl_Callback*)cb_class_tabs);
-        class_tabs->hide();
         { class_tabs_main = new Fl_Group(10, 30, 400, 330, "Class");
           class_tabs_main->labelsize(11);
           class_tabs_main->callback((Fl_Callback*)propagate_load);

fluid/panels/widget_panel.fl

@@ -80,6 +80,9 @@ decl {\#include <FL/Fl_Menu_Item.H>} {private global
 decl {\#include <FL/Fl_File_Chooser.H>} {private global
 }
 
+decl {\#include <ctype.h>} {selected private global
+}
+
 decl {\#define ZERO_ENTRY 1000} {private global
 }
 
@@ -486,8 +489,8 @@ Function {make_widget_panel()} {
     } {
       Fl_Tabs widget_tabs {
         callback {if (current_widget)
-  propagate_load((Fl_Group *)o,v);} selected
-        xywh {10 10 400 350} selection_color 12 labelsize 11 labelcolor 7 when 0
+  propagate_load((Fl_Group *)o,v);}
+        xywh {10 10 400 350} selection_color 12 labelsize 11 labelcolor 7 when 0 hide
         code0 {o->show();}
       } {
         Fl_Group wp_gui_tab {
@@ -2972,8 +2975,8 @@ if (v == LOAD) {
       }
       Fl_Tabs class_tabs {
         callback {if (current_node && current_node->is_a(Type::Class))
-  propagate_load((Fl_Group *)o,v);}
-        xywh {10 10 400 350} selection_color 12 labelsize 11 labelcolor 255 hide
+  propagate_load((Fl_Group *)o,v);} open
+        xywh {10 10 400 350} selection_color 12 labelsize 11 labelcolor 255
       } {
         Fl_Group class_tabs_main {
           label Class
@@ -3032,11 +3035,10 @@ if (v == LOAD) {
 Class_Node* nd = (Class_Node*)current_node;
 
 if (v == LOAD) {
-  o->value( nd->prefix() );
+  o->value( nd->prefix().c_str() );
 } else {
-  const char *nn = nd->prefix();
-  if (   ( nn && (strcmp(nn, o->value()) != 0))
-      || (!nn && (strcmp("", o->value()) != 0)) )
+  auto nn = nd->prefix();
+  if (nn != o->value())
   {
     nd->prefix( o->value() );
     Fluid.proj.set_modflag(1);
@@ -3054,13 +3056,37 @@ if (v == LOAD) {
   o->value( nd->name() );
 } else {
   const char *nn = nd->name();
-  if (   ( nn && (strcmp(nn, o->value()) != 0))
-      || (!nn && (strcmp("", o->value()) != 0)) )
+  char *nv = strdup( o->value() );
+  // There is an inconsistency in the project file reader, so this string
+  // must not coantain anything but alphanumeric and underscore characters.
+  char *s = (char*)nv;
+  char *d = (char*)nv;
+  while (*s) {
+    if (isalnum((unsigned char)*s) || *s == '_') {
+      *d++ = *s;
+    }
+    s++;
+  }
+  *d = 0;
+  // The class name must not be empty either
+  if (*nv == 0) {
+    free((void*)nv);
+    nv = strdup("MyClass");
+  }
+  // The class name may have changed, so update the widget
+  o->value( nv );
+  // Now copy the new name into the node if it changed
+  if (   ( nn && (strcmp(nn, nv) != 0))
+      || (!nn && (strcmp("", nv) != 0)) )
   {
-    nd->name( o->value() );
+    nd->name( nv );
     Fluid.proj.set_modflag(1);
     redraw_browser();
   }
+  // Don't forget to clean up
+  if (nv) {
+    free((void*)nv);
+  }
 }}
             tooltip {class name, must be a single C++ keyword} xywh {95 75 305 20} labelfont 1 labelsize 11 textfont 4 textsize 11
           }