ui/gfx/rect_base_impl.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/gfx/rect_base.h"
   6
   7 #include "base/logging.h"
   8 #include "base/strings/stringprintf.h"
   9
  10 // This file provides the implementation for RectBaese template and
  11 // used to instantiate the base class for Rect and RectF classes.
  12 #if !defined(UI_IMPLEMENTATION)
  13 #error "This file is intended for UI implementation only"
  14 #endif
  15
  16 namespace {
  17
  18 template<typename Type>
  19 void AdjustAlongAxis(Type dst_origin, Type dst_size, Type* origin, Type* size) {
  20   *size = std::min(dst_size, *size);
  21   if (*origin < dst_origin)
  22     *origin = dst_origin;
  23   else
  24     *origin = std::min(dst_origin + dst_size, *origin + *size) - *size;
  25 }
  26
  27 } // namespace
  28
  29 namespace gfx {
  30
  31 template<typename Class,
  32          typename PointClass,
  33          typename SizeClass,
  34          typename InsetsClass,
  35          typename VectorClass,
  36          typename Type>
  37 void RectBase<Class, PointClass, SizeClass, InsetsClass, VectorClass, Type>::
  38     SetRect(Type x, Type y, Type width, Type height) {
  39   origin_.SetPoint(x, y);
  40   set_width(width);
  41   set_height(height);
  42 }
  43
  44 template<typename Class,
  45          typename PointClass,
  46          typename SizeClass,
  47          typename InsetsClass,
  48          typename VectorClass,
  49          typename Type>
  50 void RectBase<Class, PointClass, SizeClass, InsetsClass, VectorClass, Type>::
  51     Inset(const InsetsClass& insets) {
  52   Inset(insets.left(), insets.top(), insets.right(), insets.bottom());
  53 }
  54
  55 template<typename Class,
  56          typename PointClass,
  57          typename SizeClass,
  58          typename InsetsClass,
  59          typename VectorClass,
  60          typename Type>
  61 void RectBase<Class, PointClass, SizeClass, InsetsClass, VectorClass, Type>::
  62     Inset(Type left, Type top, Type right, Type bottom) {
  63   origin_ += VectorClass(left, top);
  64   set_width(std::max(width() - left - right, static_cast<Type>(0)));
  65   set_height(std::max(height() - top - bottom, static_cast<Type>(0)));
  66 }
  67
  68 template<typename Class,
  69          typename PointClass,
  70          typename SizeClass,
  71          typename InsetsClass,
  72          typename VectorClass,
  73          typename Type>
  74 void RectBase<Class, PointClass, SizeClass, InsetsClass, VectorClass, Type>::
  75     Offset(Type horizontal, Type vertical) {
  76   origin_ += VectorClass(horizontal, vertical);
  77 }
  78
  79 template<typename Class,
  80          typename PointClass,
  81          typename SizeClass,
  82          typename InsetsClass,
  83          typename VectorClass,
  84          typename Type>
  85 void RectBase<Class, PointClass, SizeClass, InsetsClass, VectorClass, Type>::
  86     operator+=(const VectorClass& offset) {
  87   origin_ += offset;
  88 }
  89
  90 template<typename Class,
  91          typename PointClass,
  92          typename SizeClass,
  93          typename InsetsClass,
  94          typename VectorClass,
  95          typename Type>
  96 void RectBase<Class, PointClass, SizeClass, InsetsClass, VectorClass, Type>::
  97     operator-=(const VectorClass& offset) {
  98   origin_ -= offset;
  99 }
 100
 101 template<typename Class,
 102          typename PointClass,
 103          typename SizeClass,
 104          typename InsetsClass,
 105          typename VectorClass,
 106          typename Type>
 107 bool RectBase<Class, PointClass, SizeClass, InsetsClass, VectorClass, Type>::
 108     operator<(const Class& other) const {
 109   if (origin_ == other.origin_) {
 110     if (width() == other.width()) {
 111       return height() < other.height();
 112     } else {
 113       return width() < other.width();
 114     }
 115   } else {
 116     return origin_ < other.origin_;
 117   }
 118 }
 119
 120 template<typename Class,
 121          typename PointClass,
 122          typename SizeClass,
 123          typename InsetsClass,
 124          typename VectorClass,
 125          typename Type>
 126 bool RectBase<Class, PointClass, SizeClass, InsetsClass, VectorClass, Type>::
 127     Contains(Type point_x, Type point_y) const {
 128   return (point_x >= x()) && (point_x < right()) &&
 129          (point_y >= y()) && (point_y < bottom());
 130 }
 131
 132 template<typename Class,
 133          typename PointClass,
 134          typename SizeClass,
 135          typename InsetsClass,
 136          typename VectorClass,
 137          typename Type>
 138 bool RectBase<Class, PointClass, SizeClass, InsetsClass, VectorClass, Type>::
 139     Contains(const Class& rect) const {
 140   return (rect.x() >= x() && rect.right() <= right() &&
 141           rect.y() >= y() && rect.bottom() <= bottom());
 142 }
 143
 144 template<typename Class,
 145          typename PointClass,
 146          typename SizeClass,
 147          typename InsetsClass,
 148          typename VectorClass,
 149          typename Type>
 150 bool RectBase<Class, PointClass, SizeClass, InsetsClass, VectorClass, Type>::
 151     Intersects(const Class& rect) const {
 152   return !(IsEmpty() || rect.IsEmpty() ||
 153            rect.x() >= right() || rect.right() <= x() ||
 154            rect.y() >= bottom() || rect.bottom() <= y());
 155 }
 156
 157 template<typename Class,
 158          typename PointClass,
 159          typename SizeClass,
 160          typename InsetsClass,
 161          typename VectorClass,
 162          typename Type>
 163 void RectBase<Class, PointClass, SizeClass, InsetsClass, VectorClass, Type>::
 164     Intersect(const Class& rect) {
 165   if (IsEmpty() || rect.IsEmpty()) {
 166     SetRect(0, 0, 0, 0);
 167     return;
 168   }
 169
 170   Type rx = std::max(x(), rect.x());
 171   Type ry = std::max(y(), rect.y());
 172   Type rr = std::min(right(), rect.right());
 173   Type rb = std::min(bottom(), rect.bottom());
 174
 175   if (rx >= rr || ry >= rb)
 176     rx = ry = rr = rb = 0;  // non-intersecting
 177
 178   SetRect(rx, ry, rr - rx, rb - ry);
 179 }
 180
 181 template<typename Class,
 182          typename PointClass,
 183          typename SizeClass,
 184          typename InsetsClass,
 185          typename VectorClass,
 186          typename Type>
 187 void RectBase<Class, PointClass, SizeClass, InsetsClass, VectorClass, Type>::
 188     Union(const Class& rect) {
 189   if (IsEmpty()) {
 190     *this = rect;
 191     return;
 192   }
 193   if (rect.IsEmpty())
 194     return;
 195
 196   Type rx = std::min(x(), rect.x());
 197   Type ry = std::min(y(), rect.y());
 198   Type rr = std::max(right(), rect.right());
 199   Type rb = std::max(bottom(), rect.bottom());
 200
 201   SetRect(rx, ry, rr - rx, rb - ry);
 202 }
 203
 204 template<typename Class,
 205          typename PointClass,
 206          typename SizeClass,
 207          typename InsetsClass,
 208          typename VectorClass,
 209          typename Type>
 210 void RectBase<Class, PointClass, SizeClass, InsetsClass, VectorClass, Type>::
 211     Subtract(const Class& rect) {
 212   if (!Intersects(rect))
 213     return;
 214   if (rect.Contains(*static_cast<const Class*>(this))) {
 215     SetRect(0, 0, 0, 0);
 216     return;
 217   }
 218
 219   Type rx = x();
 220   Type ry = y();
 221   Type rr = right();
 222   Type rb = bottom();
 223
 224   if (rect.y() <= y() && rect.bottom() >= bottom()) {
 225     // complete intersection in the y-direction
 226     if (rect.x() <= x()) {
 227       rx = rect.right();
 228     } else if (rect.right() >= right()) {
 229       rr = rect.x();
 230     }
 231   } else if (rect.x() <= x() && rect.right() >= right()) {
 232     // complete intersection in the x-direction
 233     if (rect.y() <= y()) {
 234       ry = rect.bottom();
 235     } else if (rect.bottom() >= bottom()) {
 236       rb = rect.y();
 237     }
 238   }
 239   SetRect(rx, ry, rr - rx, rb - ry);
 240 }
 241
 242 template<typename Class,
 243          typename PointClass,
 244          typename SizeClass,
 245          typename InsetsClass,
 246          typename VectorClass,
 247          typename Type>
 248 void RectBase<Class, PointClass, SizeClass, InsetsClass, VectorClass, Type>::
 249     AdjustToFit(const Class& rect) {
 250   Type new_x = x();
 251   Type new_y = y();
 252   Type new_width = width();
 253   Type new_height = height();
 254   AdjustAlongAxis(rect.x(), rect.width(), &new_x, &new_width);
 255   AdjustAlongAxis(rect.y(), rect.height(), &new_y, &new_height);
 256   SetRect(new_x, new_y, new_width, new_height);
 257 }
 258
 259 template<typename Class,
 260          typename PointClass,
 261          typename SizeClass,
 262          typename InsetsClass,
 263          typename VectorClass,
 264          typename Type>
 265 PointClass RectBase<Class, PointClass, SizeClass, InsetsClass, VectorClass,
 266     Type>::CenterPoint() const {
 267   return PointClass(x() + width() / 2, y() + height() / 2);
 268 }
 269
 270 template<typename Class,
 271          typename PointClass,
 272          typename SizeClass,
 273          typename InsetsClass,
 274          typename VectorClass,
 275          typename Type>
 276 void RectBase<Class, PointClass, SizeClass, InsetsClass, VectorClass, Type>::
 277     ClampToCenteredSize(const SizeClass& size) {
 278   Type new_width = std::min(width(), size.width());
 279   Type new_height = std::min(height(), size.height());
 280   Type new_x = x() + (width() - new_width) / 2;
 281   Type new_y = y() + (height() - new_height) / 2;
 282   SetRect(new_x, new_y, new_width, new_height);
 283 }
 284
 285 template<typename Class,
 286          typename PointClass,
 287          typename SizeClass,
 288          typename InsetsClass,
 289          typename VectorClass,
 290          typename Type>
 291 void RectBase<Class, PointClass, SizeClass, InsetsClass, VectorClass, Type>::
 292     SplitVertically(Class* left_half, Class* right_half) const {
 293   DCHECK(left_half);
 294   DCHECK(right_half);
 295
 296   left_half->SetRect(x(), y(), width() / 2, height());
 297   right_half->SetRect(left_half->right(),
 298                       y(),
 299                       width() - left_half->width(),
 300                       height());
 301 }
 302
 303 template<typename Class,
 304          typename PointClass,
 305          typename SizeClass,
 306          typename InsetsClass,
 307          typename VectorClass,
 308          typename Type>
 309 bool RectBase<Class, PointClass, SizeClass, InsetsClass, VectorClass, Type>::
 310     SharesEdgeWith(const Class& rect) const {
 311   return (y() == rect.y() && height() == rect.height() &&
 312              (x() == rect.right() || right() == rect.x())) ||
 313          (x() == rect.x() && width() == rect.width() &&
 314              (y() == rect.bottom() || bottom() == rect.y()));
 315 }
 316
 317 }  // namespace gfx