shithub: libnate

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dirty state tracking, conditional redraw

--- a/nate.c

+++ b/nate.c

@@ -287,15 +287,27 @@

 #undef A

 }

+/* global "needs" */

+Dirtyflag Gdirty;

+

 void

-nateredraw(int all)

+nateredraw(Dirtyflag flags)

 {

 	if (!rootelem)

 		return;

-	if (all)

+	if (flags&RESIZE || Gdirty&RESIZE)

 		ncallcalcrect(rootelem, screen, screen->r);

-	ncalldraw(rootelem, screen);

+	if (flags&DRAW || flags&RESIZE || Gdirty&DRAW)

+		ncalldraw(rootelem, screen);

+}

+

+void

+nsetdirty(Nelem *nel, Dirtyflag flag)

+{

+	if (nel)

+		nel->dirty |= flag;

+	Gdirty |= flag;

 }

 void

--- a/nate.h

+++ b/nate.h

@@ -58,8 +58,13 @@

 /* user functions */

 /******************/

+typedef enum {

+	DRAW = 1,

+	RESIZE = 2,

+} Dirtyflag;

+

 void nateinit(void);

-void nateredraw(int all);

+void nateredraw(Dirtyflag flags);

 void ndebugprint(Nelem*, char*, ...);

 int natemouseevent(Mouse);

@@ -102,6 +107,7 @@

 	char *type;

 	char *name;

 	Nslot slot;

+	Dirtyflag dirty;

 	Nlist children;

 	int nchildren; /* -1=inf, 0=none, n otherwise */

 	Nelemaccessors *accs;

@@ -149,6 +155,8 @@

 int ncallhit(Nelem*, Mouse);

 void ncallfree(Nelem*);

 Nlist* ncallgetchildren(Nelem*);

+

+void nsetdirty(Nelem*, Dirtyflag);

 /***********************/