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Add library init/free, widgetclass register/unregister

Dario Rodriguez authored on 27/03/2022 14:42:39
Showing 2 changed files
widgetlib.c
History View file @ 95bc1ff
... ... 
@@ -7,4 +7,206 @@
7 7 
  * Please see the file LICENSE.txt in the source's root directory.
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  */
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+#include <stdio.h>
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+#include <stdlib.h>
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+#include <unistd.h>
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+#include <string.h>
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 #include "widgetlib.h"
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+
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+#define BLOCKWICLASS 16
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+
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+wi_t *
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+wi_init(void)
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+{
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+        wi_t *wi;
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+        if((wi=malloc(sizeof(wi_t)))==NULL)
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+                return(NULL); /* insuf. mem. */
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+        memset(wi,0,sizeof(wi_t));
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+        return(wi);
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+}
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+
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+void
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+wi_free(wi_t *wi)
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+{
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+        int i;
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+        if(wi==NULL)
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+                return; /* nothing to do */
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+        for(i=wi->usedclasses-1;i>=0 && i<wi->usedclasses;i--)
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+                wi_class_unregister(wi,wi->classes[i].classname);
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+        if(wi->classes!=NULL)
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+                free(wi->classes),wi->classes=NULL,wi->sizeclasses=wi->usedclasses=0;
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+        free(wi),wi=NULL;
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+        return;
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+}
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+
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+int
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+wi_class_register(wi_t *wi, char *classname, int (*classcallback)(void *wi, wiclass_t *cl, widget_t *widget, wiclassop_t *op))
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+{
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+        wiclass_t *cl;
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+        wiclassop_t clop;
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+        if(wi==NULL || classname==NULL || classcallback==NULL)
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+                return(-1); /* sanity check error */
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+        wi_class_unregister(wi,classname);
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+        if(wi->sizeclasses==wi->usedclasses) {
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+                wiclass_t *newclasses;
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+                int newsize;
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+                newsize=wi->sizeclasses+BLOCKWICLASS;
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+                if((newclasses=realloc(wi->classes,newsize*sizeof(wiclass_t)))==NULL)
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+                        return(-1); /* insuf. mem. */
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+                wi->classes=newclasses;
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+                memset(newclasses+wi->sizeclasses,0,sizeof(wiclass_t)*(newsize-wi->sizeclasses));
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+                wi->sizeclasses=newsize;
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+        }
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+        cl=wi->classes+wi->usedclasses;
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+        memset(cl,0,sizeof(wiclass_t));
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+        memset(&clop,0,sizeof(clop));
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+        clop.op=classop_initclass;
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+        cl->classcallback=classcallback;
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+        if((cl->classname=strdup(classname))==NULL || classcallback(wi,cl,NULL,&clop)!=0) {
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+                if(cl->classname!=NULL)
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+                        free(cl->classname),cl->classname=NULL;
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+                if(cl->classglobaldata!=NULL)
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+                        free(cl->classglobaldata),cl->classglobaldata=NULL,cl->sizeclassglobaldata=0;
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+                cl->classcallback=NULL;
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+                return(-1); /* insuf. mem. */
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+        }
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+        wi->usedclasses++;
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+        return(0);
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+}
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+
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+int
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+wi_class_unregister(wi_t *wi, char *classname)
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+{
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+        int i;
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+        wiclass_t *cl;
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+        wiclassop_t clop;
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+        if(wi==NULL || classname==NULL)
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+                return(-1); /* sanity check failed */
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+        /* search for class starting from last (as the usual user of this function is wi_free(), and it frees classes starting from the last one) */
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+        for(i=wi->usedclasses-1;i>=0;i--) {
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+                if(strcmp(wi->classes[i].classname,classname)==0)
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+                        break;
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+        }
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+        if(i<0)
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+                return(-1); /* unknown classname */
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+        cl=wi->classes+i;
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+        memset(&clop,0,sizeof(clop));
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+        clop.op=classop_freeclass;
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+        cl->classcallback(wi,cl,NULL,&clop);
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+        if(cl->classname!=NULL)
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+                free(cl->classname),cl->classname=NULL;
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+        if(cl->classglobaldata!=NULL)
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+                free(cl->classglobaldata),cl->classglobaldata=NULL,cl->sizeclassglobaldata=0;
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+        cl->classcallback=NULL;
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+        memmove(wi->classes+i,wi->classes+i+1,(wi->usedclasses-(i+1))*sizeof(wiclass_t));
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+        memset(wi->classes+(wi->usedclasses-1),0,sizeof(wiclass_t));
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+        wi->usedclasses--;
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+        return(0);
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+}
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+
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+int
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+wi_toplevel_set(wi_t *wi, char *name)
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+{
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+#warning TODO
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+        return(-1);
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+}
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+
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+int
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+wi_toplevel_destroy(wi_t *wi, char *name)
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+{
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+#warning TODO
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+        return(-1);
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+}
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+
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+char *
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+wi_add(wi_t *wi, char *debugfile, int debugline, char *class, char *path, char *format,...)
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+{
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+#warning TODO
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+        return(NULL);
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+}
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+
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+char *
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+wi_config(wi_t *wi, char *debugfile, int debugline, char *path, char *format,...)
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+{
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+#warning TODO
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+        return(NULL);
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+}
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+
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+int
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+wi_pack(wi_t *wi, char *debugfile, int debugline, char *path, char *format,...)
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+{
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+#warning TODO
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+        return(-1);
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+}
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+
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+int
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+wi_destroy(wi_t *wi, char *path)
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+{
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+#warning TODO
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+        return(-1);
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+}
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+
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+int
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+wi_alias_set(wi_t *wi, char *alias, char *path)
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+{
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+#warning TODO
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+        return(-1);
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+}
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+
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+int
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+wi_alias_unset(wi_t *wi, char *alias)
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+{
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+#warning TODO
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+        return(-1);
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+}
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+
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+int
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+wi_tree_move(wi_t *wi, char *path, char *newparent)
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+{
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+#warning TODO
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+        return(-1);
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+}
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+
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+int
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+wi_var_updated(wi_t *wi, char *vardata, int sizevardata)
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+{
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+#warning TODO
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+        return(-1);
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+}
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+
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+int wi_var_destroy(wi_t *wi, char *vardata, int sizevardata)
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+{
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+#warning TODO
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+        return(-1);
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+}
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+
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+int
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+wi_font_load(wi_t *wi, char *filename, char *fontname)
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+{
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+#warning TODO
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+        return(-1);
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+}
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+
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+/* default widgets */
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+int
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+wi_classcallback_frame(void *wi, wiclass_t *cl, widget_t *widget, wiclassop_t *op)
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+{
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+#warning TODO
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+        return(-1);
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+}
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+
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+int
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+wi_classcallback_label(void *wi, wiclass_t *cl, widget_t *widget, wiclassop_t *op)
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+{
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+#warning TODO
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+        return(-1);
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+}
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+
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+int
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+wi_classcallback_image(void *wi, wiclass_t *cl, widget_t *widget, wiclassop_t *op)
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+{
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+#warning TODO
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+        return(-1);
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+}
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+
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+
widgetlib.h
History View file @ 95bc1ff
... ... 
@@ -157,7 +157,7 @@ typedef struct wiclass_t {
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         char *classname;
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         int sizeclassglobaldata;
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         char *classglobaldata;
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-        void (*classcallback)(void *wi, struct wiclass_t *cl, widget_t *widget, wiclassop_t *op);
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+        int (*classcallback)(void *wi, struct wiclass_t *cl, widget_t *widget, wiclassop_t *op);
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 } wiclass_t;
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 typedef struct wifontinstance_t {
... ... 
@@ -194,10 +194,10 @@ typedef struct wi_t {
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         wifont_t *fonts;
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 } wi_t;
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-wi_t wi_init(void);
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+wi_t *wi_init(void);
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 void wi_free(wi_t *wi);
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-int wi_class_register(wi_t *wi, char *classname, void (*classcallback)(void *wi, wiclass_t *cl, widget_t *widget, wiclassop_t *op));
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+int wi_class_register(wi_t *wi, char *classname, int (*classcallback)(void *wi, wiclass_t *cl, widget_t *widget, wiclassop_t *op));
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 int wi_class_unregister(wi_t *wi, char *classname);
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 int wi_toplevel_set(wi_t *wi, char *name);
... ... 
@@ -208,9 +208,9 @@ char *wi_add(wi_t *wi, char *debugfile, int debugline, char *class, char *path,
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 char *wi_config(wi_t *wi, char *debugfile, int debugline, char *path, char *format,...);
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 int wi_pack(wi_t *wi, char *debugfile, int debugline, char *path, char *format,...);
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 #else
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-  char *wi_add(wi_t *wi, char *debugfile, int debugline, char *class, char *path, char *format,...) __attribute__ ((format (printf,6,7));
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-  char *wi_config(wi_t *wi, char *debugfile, int debugline, char *path, char *format,...) __attribute__ ((format (printf,5,6));
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-  int wi_pack(wi_t *wi, char *debugfile, int debugline, char *path, char *format,...) __attribute__ ((format (printf,5,6));
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+  char *wi_add(wi_t *wi, char *debugfile, int debugline, char *class, char *path, char *format,...) __attribute__ ((format (printf,6,7)));
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+  char *wi_config(wi_t *wi, char *debugfile, int debugline, char *path, char *format,...) __attribute__ ((format (printf,5,6)));
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+  int wi_pack(wi_t *wi, char *debugfile, int debugline, char *path, char *format,...) __attribute__ ((format (printf,5,6)));
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 #endif
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 int wi_destroy(wi_t *wi, char *path);
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... ... 
@@ -225,8 +225,8 @@ int wi_var_destroy(wi_t *wi, char *vardata, int sizevardata);
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 int wi_font_load(wi_t *wi, char *filename, char *fontname);
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 /* default widgets */
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-void wi_classcallback_frame(void *wi, wiclass_t *cl, widget_t *widget, wiclassop_t *op);
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-void wi_classcallback_label(void *wi, wiclass_t *cl, widget_t *widget, wiclassop_t *op);
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-void wi_classcallback_image(void *wi, wiclass_t *cl, widget_t *widget, wiclassop_t *op);
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+int wi_classcallback_frame(void *wi, wiclass_t *cl, widget_t *widget, wiclassop_t *op);
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+int wi_classcallback_label(void *wi, wiclass_t *cl, widget_t *widget, wiclassop_t *op);
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+int wi_classcallback_image(void *wi, wiclass_t *cl, widget_t *widget, wiclassop_t *op);
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 #endif
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