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Implement Control+UP/DOWN: scroll the screen instead of moving the cursor position

Dario Rodriguez authored on 07/01/2021 18:23:45
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recenteditor.c
History View file @ 7ade974
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@@ -610,10 +610,23 @@ fprintf(stderr,"SDL_KEYDOWN: sym:%i\n",event->key.keysym.sym);
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                 re->headerdirty=1;
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                 re->contentsdirty=1;
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         } else if(event->key.keysym.sym==SDLK_DOWN || event->key.keysym.sym==SDLK_UP) {
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+                int move_res;
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                 int oldcol=re->curcol,oldline=re->curline;
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-                if(re_moveupdown(re,(event->key.keysym.sym==SDLK_UP)?-1:1)==0 && (SDL_GetModState()&KMOD_SHIFT)!=0 && (re->curcol!=oldcol || re->curline!=oldline)) {
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+                if((SDL_GetModState()&KMOD_CTRL)!=0 && event->key.keysym.sym==SDLK_UP && re->originline==0)
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+                        return(0); /* nothing to do, already at top */
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+                move_res=re_moveupdown(re,(event->key.keysym.sym==SDLK_UP)?-1:1);
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+                if(move_res==0 && (SDL_GetModState()&KMOD_SHIFT)!=0 && (re->curcol!=oldcol || re->curline!=oldline)) {
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                         re_sel_resize(re,oldcol,oldline,(event->key.keysym.sym==SDLK_UP)?-1:1);
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                 }
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+                if(move_res==0 && (SDL_GetModState()&KMOD_CTRL)!=0) {
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+                        if(event->key.keysym.sym==SDLK_UP && re->originline>0) {
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+                                re->originline--;
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+                                re->contentsdirty=1;
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+                        } else if(event->key.keysym.sym==SDLK_DOWN && re->originline<re->curline) {
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+                                re->originline++;
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+                                re->contentsdirty=1;
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+                        }
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+                }
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         } else if(event->key.keysym.sym==SDLK_LEFT || event->key.keysym.sym==SDLK_RIGHT) {
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                 int oldcol=re->curcol,oldline=re->curline;
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                 if(re_moveleftright(re,(event->key.keysym.sym==SDLK_LEFT)?-1:1)==0 && (SDL_GetModState()&KMOD_SHIFT)!=0 && (re->curcol!=oldcol || re->curline!=oldline)) {