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annotate anagram/vaclgui/agrect.cpp @ 21:1c9dac05d040

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Add lint-style FALLTHROUGH annotations to fallthrough cases. (in the parse engine and thus the output code) Document this, because the old output causes warnings with gcc10.
author David A. Holland
date Mon, 13 Jun 2022 00:04:38 -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 }