9dc9c6c5ef
- remove redundant flushimage() calls before readmouse() - remove flushimage() calls for allocimage(),freeimage() and originwindow() this is experimental. it will break allocimage() error handling unless the caller does explicit flushimage() calls, tho the gains in usability over high latency connections is huge. in most cases, programs will just terminate when encountering these errors.
133 lines
2.5 KiB
C
133 lines
2.5 KiB
C
#include <u.h>
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#include <libc.h>
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#include <draw.h>
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#include <thread.h>
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#include <mouse.h>
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#include <frame.h>
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static
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int
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region(int a, int b)
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{
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if(a < b)
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return -1;
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if(a == b)
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return 0;
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return 1;
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}
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void
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frselect(Frame *f, Mousectl *mc) /* when called, button 1 is down */
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{
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ulong p0, p1, q;
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Point mp, pt0, pt1, qt;
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int reg, b, scrled;
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mp = mc->xy;
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b = mc->buttons;
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f->modified = 0;
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frdrawsel(f, frptofchar(f, f->p0), f->p0, f->p1, 0);
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p0 = p1 = frcharofpt(f, mp);
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f->p0 = p0;
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f->p1 = p1;
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pt0 = frptofchar(f, p0);
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pt1 = frptofchar(f, p1);
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frdrawsel(f, pt0, p0, p1, 1);
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reg = 0;
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do{
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scrled = 0;
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if(f->scroll){
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if(mp.y < f->r.min.y){
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(*f->scroll)(f, -(f->r.min.y-mp.y)/(int)f->font->height-1);
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p0 = f->p1;
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p1 = f->p0;
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scrled = 1;
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}else if(mp.y > f->r.max.y){
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(*f->scroll)(f, (mp.y-f->r.max.y)/(int)f->font->height+1);
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p0 = f->p0;
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p1 = f->p1;
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scrled = 1;
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}
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if(scrled){
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if(reg != region(p1, p0))
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q = p0, p0 = p1, p1 = q; /* undo the swap that will happen below */
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pt0 = frptofchar(f, p0);
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pt1 = frptofchar(f, p1);
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reg = region(p1, p0);
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}
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}
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q = frcharofpt(f, mp);
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if(p1 != q){
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if(reg != region(q, p0)){ /* crossed starting point; reset */
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if(reg > 0)
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frdrawsel(f, pt0, p0, p1, 0);
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else if(reg < 0)
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frdrawsel(f, pt1, p1, p0, 0);
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p1 = p0;
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pt1 = pt0;
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reg = region(q, p0);
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if(reg == 0)
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frdrawsel(f, pt0, p0, p1, 1);
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}
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qt = frptofchar(f, q);
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if(reg > 0){
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if(q > p1)
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frdrawsel(f, pt1, p1, q, 1);
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else if(q < p1)
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frdrawsel(f, qt, q, p1, 0);
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}else if(reg < 0){
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if(q > p1)
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frdrawsel(f, pt1, p1, q, 0);
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else
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frdrawsel(f, qt, q, p1, 1);
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}
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p1 = q;
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pt1 = qt;
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}
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f->modified = 0;
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if(p0 < p1) {
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f->p0 = p0;
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f->p1 = p1;
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}
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else {
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f->p0 = p1;
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f->p1 = p0;
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}
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if(scrled)
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(*f->scroll)(f, 0);
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if(!scrled)
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readmouse(mc);
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mp = mc->xy;
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}while(mc->buttons == b);
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}
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void
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frselectpaint(Frame *f, Point p0, Point p1, Image *col)
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{
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int n;
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Point q0, q1;
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q0 = p0;
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q1 = p1;
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q0.y += f->font->height;
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q1.y += f->font->height;
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n = (p1.y-p0.y)/f->font->height;
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if(f->b == nil)
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drawerror(f->display, "frselectpaint b==0");
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if(p0.y == f->r.max.y)
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return;
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if(n == 0)
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draw(f->b, Rpt(p0, q1), col, nil, ZP);
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else{
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if(p0.x >= f->r.max.x)
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p0.x = f->r.max.x-1;
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draw(f->b, Rect(p0.x, p0.y, f->r.max.x, q0.y), col, nil, ZP);
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if(n > 1)
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draw(f->b, Rect(f->r.min.x, q0.y, f->r.max.x, p1.y),
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col, nil, ZP);
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draw(f->b, Rect(f->r.min.x, p1.y, q1.x, q1.y),
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col, nil, ZP);
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}
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}
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