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frselect.c - sam - An updated version of the sam text editor. |
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git clone git://vernunftzentrum.de/sam.git |
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frselect.c (2426B) |
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1 /* Copyright (c) 1998 Lucent Technologies - All rights reserved. */ |
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2 #include <u.h> |
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3 #include <libg.h> |
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4 #include <frame.h> |
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5 |
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6 void |
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7 frselect(Frame *f, Mouse *m) /* when called, button 1 is down */ |
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8 { |
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9 uint64_t p0, p1, q; |
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10 Point mp, pt0, pt1, qt; |
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11 |
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12 mp = m->xy; |
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13 |
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14 Again: |
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15 f->modified = 0; |
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16 frselectp(f, F&~D); |
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17 p0 = p1 = frcharofpt(f, mp); |
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18 pt0 = frptofchar(f, p0); |
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19 pt1 = frptofchar(f, p1); |
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20 frselectf(f, pt0, pt1, F&~D); |
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21 do{ |
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22 if(f->modified) /* special hack so 8½ can frselect in parallel … |
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23 goto Again; |
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24 q = frcharofpt(f, m->xy); |
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25 if(p1 != q){ |
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26 if(p0 == p1) |
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27 frselectf(f, pt0, pt1, F&~D); |
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28 qt = frptofchar(f, q); |
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29 if(p1 < q) |
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30 frselectf(f, pt1, qt, F&~D); |
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31 else |
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32 frselectf(f, qt, pt1, F&~D); |
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33 p1 = q; |
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34 pt1 = qt; |
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35 if(p0 == p1) |
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36 frselectf(f, pt0, pt1, F&~D); |
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37 } |
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38 f->modified = 0; |
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39 if(p0 < p1) |
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40 f->p0 = p0, f->p1 = p1; |
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41 else |
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42 f->p0 = p1, f->p1 = p0; |
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43 frgetmouse(); |
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44 }while((m->buttons & 7) == 1); |
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45 } |
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46 /* it is assumed p0<=p1 and both were generated by frptofchar() */ |
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47 void |
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48 frselectf(Frame *f, Point p0, Point p1, Fcode c) |
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49 { |
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50 int n; |
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51 Point q0, q1; |
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52 |
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53 if(p0.x == f->left) |
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54 p0.x = f->r.min.x; |
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55 if(p1.x == f->left) |
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56 p1.x = f->r.min.x; |
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57 q0 = p0; |
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58 q1 = p1; |
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59 q0.y += f->fheight; |
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60 q1.y += f->fheight; |
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61 n = (p1.y-p0.y)/f->fheight; |
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62 if(f->b == 0) |
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63 berror("frselectf b==0"); |
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64 if(p0.y == f->r.max.y) |
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65 return; |
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66 if(n == 0){ |
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67 if(p0.x == p1.x){ |
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68 if(p0.x == f->r.min.x) |
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69 q1.x++; |
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70 else |
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71 p0.x--; |
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72 } |
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73 bitblt2(f->b, p0, f->b, Rpt(p0, q1), c, 0, f->bg); |
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74 }else{ |
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75 if(p0.x >= f->r.max.x) |
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76 p0.x = f->r.max.x-1; |
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77 bitblt2(f->b, p0, f->b, Rect(p0.x, p0.y, f->r.max.x, q0.y), c, 0… |
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78 if(n > 1) |
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79 bitblt2(f->b, Pt(f->r.min.x, q0.y), |
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80 f->b, Rect(f->r.min.x, q0.y, f->r.max.x, p1.y), c, 0, f-… |
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81 bitblt2(f->b, Pt(f->r.min.x, p1.y), |
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82 f->b, Rect(f->r.min.x, p1.y, q1.x, q1.y), c, 0, f->bg); |
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83 } |
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84 } |
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85 |
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86 void |
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87 frselectp(Frame *f, Fcode c) |
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88 { |
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89 Point pt0, pt1; |
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90 |
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91 pt0 = frptofchar(f, f->p0); |
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92 pt1 = (f->p0==f->p1)? pt0 : frptofchar(f, f->p1); |
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93 frselectf(f, pt0, pt1, c); |
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94 } |
