Initial import.

src/libframe/frinit.c

@@ -0,0 +1,83 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <mouse.h>
+#include <frame.h>
+
+void
+frinit(Frame *f, Rectangle r, Font *ft, Image *b, Image *cols[NCOL])
+{
+	f->font = ft;
+	f->display = b->display;
+	f->maxtab = 8*stringwidth(ft, "0");
+	f->nbox = 0;
+	f->nalloc = 0;
+	f->nchars = 0;
+	f->nlines = 0;
+	f->p0 = 0;
+	f->p1 = 0;
+	f->box = 0;
+	f->lastlinefull = 0;
+	if(cols != 0)
+		memmove(f->cols, cols, sizeof f->cols);
+	frsetrects(f, r, b);
+	if(f->tick==nil && f->cols[BACK]!=0)
+		frinittick(f);
+}
+
+void
+frinittick(Frame *f)
+{
+	Image *b;
+	Font *ft;
+
+	b = f->display->screenimage;
+	ft = f->font;
+	if(f->tick)
+		freeimage(f->tick);
+	f->tick = allocimage(f->display, Rect(0, 0, FRTICKW, ft->height), b->chan, 0, DWhite);
+	if(f->tick == nil)
+		return;
+	if(f->tickback)
+		freeimage(f->tickback);
+	f->tickback = allocimage(f->display, f->tick->r, b->chan, 0, DWhite);
+	if(f->tickback == 0){
+		freeimage(f->tick);
+		f->tick = 0;
+		return;
+	}
+	/* background color */
+	draw(f->tick, f->tick->r, f->cols[BACK], nil, ZP);
+	/* vertical line */
+	draw(f->tick, Rect(FRTICKW/2, 0, FRTICKW/2+1, ft->height), f->display->black, nil, ZP);
+	/* box on each end */
+	draw(f->tick, Rect(0, 0, FRTICKW, FRTICKW), f->cols[TEXT], nil, ZP);
+	draw(f->tick, Rect(0, ft->height-FRTICKW, FRTICKW, ft->height), f->cols[TEXT], nil, ZP);
+}
+
+void
+frsetrects(Frame *f, Rectangle r, Image *b)
+{
+	f->b = b;
+	f->entire = r;
+	f->r = r;
+	f->r.max.y -= (r.max.y-r.min.y)%f->font->height;
+	f->maxlines = (r.max.y-r.min.y)/f->font->height;
+}
+
+void
+frclear(Frame *f, int freeall)
+{
+	if(f->nbox)
+		_frdelbox(f, 0, f->nbox-1);
+	if(f->box)
+		free(f->box);
+	if(freeall){
+		freeimage(f->tick);
+		freeimage(f->tickback);
+		f->tick = 0;
+		f->tickback = 0;
+	}
+	f->box = 0;
+	f->ticked = 0;
+}