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annotate anagram/vaclgui/agrect.cpp @ 15:f5acaf0c8a29

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Don't cast through "volatile int". Causes a gcc warning nowadays. XXX: should put something else back here to frighten the optimizer
author David A. Holland
date Tue, 31 May 2022 01:00:55 -0400
parents 13d2b8934445
children
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1 /*
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2 * AnaGram, A System for Syntax Directed Programming
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3 * Copyright 1997-2002 Parsifal Software. All Rights Reserved.
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4 * See the file COPYING for license and usage terms.
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5 *
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6 * agrect.cpp
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7 */
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8
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9 #include "agrect.hpp"
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10
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11
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12 AgQuadrant opposite(AgQuadrant corner) {
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13 return (AgQuadrant) ((int) corner ^ 3);
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14 }
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15
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16 AgRectangle::AgRectangle(RECT r) {
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17 pos = cint(r.left, r.top);
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18 sz = cint(r.right - r.left, r.bottom - r.top);
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19 }
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20
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21 AgRectangle::AgRectangle(IWindow *w) : anchor(upperLeft) {
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22 pos = w->position();
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23 sz = w->size();
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24 }
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25
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26 AgRectangle::AgRectangle(cint size_)
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27 : pos(0,0)
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28 , sz(size_)
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29 , anchor(upperLeft)
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30 {}
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31
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32 AgRectangle::AgRectangle(cint loc, cint size_, AgQuadrant whichQuadrant)
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33 : pos(loc)
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34 , sz(size_)
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35 , anchor(whichQuadrant)
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36 {
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37 switch (anchor) {
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38 case upperRight: pos.y -= sz.y; break;
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39 case upperLeft: pos.y -= sz.y; /* fallthrough */
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40 case lowerLeft: pos.x -= sz.x; break;
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41 }
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42 }
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43
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44 cint AgRectangle::position(AgQuadrant whichCorner) {
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45 cint where = pos;
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46 switch (whichCorner) {
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47 case lowerLeft: where.y += sz.y; break;
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48 case lowerRight: where.y += sz.y; /* fallthrough */
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49 case upperRight: where.x += sz.x; break;
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50 }
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51 return where;
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52 }
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53
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54 AgRectangle &AgRectangle::setSize(cint s) {
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55 cint pos = position(anchor);
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56 sz = s;
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57 switch (anchor) {
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58 case upperRight: pos.y -= sz.y; break;
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59 case upperLeft: pos.y -= sz.y; /* fallthrough */
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60 case lowerLeft: pos.x -= sz.x; break;
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61 }
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62 return *this;
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63 }
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64
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65 AgRectangle AgRectangle::intersection(AgRectangle &r) {
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66 cint loc = lrci(pos, r.pos);
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67 cint lr = ulci(pos+sz, r.pos + r.sz);
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68 lr = lrci(loc,lr);
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69 return AgRectangle(loc, lr - loc);
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70 }
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71
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72 AgRectangle &AgRectangle::limit(cint size) {
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73 sz = ulci(sz, size);
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74 pos = ulci(pos, size - sz);
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75 pos = lrci(pos, cint(0, 0));
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76 return *this;
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77 }
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78
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79 AgRectangle AgRectangle::desktop() {
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80 RECT r;
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81 SystemParametersInfo(SPI_GETWORKAREA, 0, &r, 0);
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82 AgRectangle rect(r);
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83 return rect;
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84 }
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85
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86 int AgRectangle::operator < (const AgRectangle &r) const {
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87 if (pos < r.pos) {
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88 return 1;
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89 }
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90 if (r.pos > pos) {
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91 return 0;
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92 }
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93 return sz < r.sz;
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94 }
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95
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96 LayoutRef::LayoutRef(AgRectangle &r) {
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97 int i;
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98 for (i = upperLeft; i <= lowerRight; i++) {
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99 AgQuadrant ic = (AgQuadrant) i;
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100 corner[ic] = r.position(ic);
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101 }
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102 stack.push(r);
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103 }
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104
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105 int LayoutRef::overlap(AgRectangle &r) {
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106 int n = stack.size();
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107 int area = 0;
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108 while (n--) {
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109 area += r.intersection(stack[n]).area();
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110 }
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111 return area;
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112 }
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113
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114 void LayoutRef::merge(AgRectangle &r) {
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115 stack.push(r);
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116 int i;
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117 for (i = upperLeft; i <= lowerRight; i++) {
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118 AgQuadrant ic = (AgQuadrant) i;
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119 cint rCorner = r.position(ic);
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120 switch (ic) {
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121 case upperLeft: {
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122 if (rCorner.y < corner[ic].y
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123 || rCorner.y == corner[ic].y && rCorner.x < corner[ic].x) {
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124 corner[ic] = rCorner;
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125 }
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126 break;
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127 }
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128 case upperRight: {
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129 if (rCorner.y < corner[ic].y
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130 || rCorner.y == corner[ic].y && rCorner.x > corner[ic].x) {
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131 corner[ic] = rCorner;
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132 }
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133 break;
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134 }
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135 case lowerLeft: {
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136 if (rCorner.y > corner[ic].y
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137 || rCorner.y == corner[ic].y && rCorner.x > corner[ic].x) {
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138 corner[ic] = rCorner;
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139 }
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140 break;
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141 }
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142 case lowerRight: {
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143 if (rCorner.y > corner[ic].y
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144 || rCorner.y == corner[ic].y && rCorner.x > corner[ic].x) {
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145 corner[ic] = rCorner;
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146 }
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147 break;
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148 }
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149 }
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150 }
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151 }