xreaderui.d

   1 /* Written by Ketmar // Invisible Vector <ketmar@ketmar.no-ip.org>
   2  * Understanding is not required. Only obedience.
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 module xreaderui;
  18
  19 import arsd.simpledisplay;
  20 import arsd.image;
  21
  22 import iv.nanovg;
  23 import iv.nanovg.oui.blendish;
  24 import iv.strex;
  25 import iv.vfs;
  26 import iv.vfs.io;
  27
  28 import xreadercfg;
  29
  30
  31 // ////////////////////////////////////////////////////////////////////////// //
  32 void loadFonts (NVGContext vg) {
  33   void loadFont (ref int fid, string name, string path) {
  34     fid = vg.createFont(name, path);
  35     if (fid < 0) throw new Exception("can't load font '"~name~"' from '"~path~"'");
  36   }
  37
  38   loadFont(textFont, "text", textFontName);
  39   loadFont(textiFont, "texti", textiFontName);
  40   loadFont(textbFont, "textb", textbFontName);
  41   loadFont(textzFont, "textz", textzFontName);
  42
  43   loadFont(monoFont, "mono", monoFontName);
  44   loadFont(monoiFont, "monoi", monoiFontName);
  45   loadFont(monobFont, "monob", monobFontName);
  46   loadFont(monozFont, "monoz", monozFontName);
  47
  48   loadFont(uiFont, "ui", uiFontName);
  49
  50   loadFont(galmapFont, "galmap", galmapFontName);
  51
  52   bndSetFont(uiFont);
  53 }
  54
  55
  56 // ////////////////////////////////////////////////////////////////////////// //
  57 // cursor (hi, Death Track!)
  58 private enum curWidth = 17;
  59 private enum curHeight = 23;
  60 private static immutable ubyte[curWidth*curHeight] curImg = [
  61   0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
  62   0,0,3,2,0,0,0,0,0,0,0,0,0,0,0,0,0,
  63   1,0,3,2,2,0,0,0,0,0,0,0,0,0,0,0,0,
  64   1,1,3,3,2,2,0,0,0,0,0,0,0,0,0,0,0,
  65   1,1,3,3,4,2,2,0,0,0,0,0,0,0,0,0,0,
  66   1,1,3,3,4,4,2,2,0,0,0,0,0,0,0,0,0,
  67   1,1,3,3,4,4,4,2,2,0,0,0,0,0,0,0,0,
  68   1,1,3,3,4,4,4,4,2,2,0,0,0,0,0,0,0,
  69   1,1,3,3,4,4,4,5,6,2,2,0,0,0,0,0,0,
  70   1,1,3,3,4,4,5,6,7,5,2,2,0,0,0,0,0,
  71   1,1,3,3,4,5,6,7,5,4,5,2,2,0,0,0,0,
  72   1,1,3,3,5,6,7,5,4,5,6,7,2,2,0,0,0,
  73   1,1,3,3,6,7,5,4,5,6,7,7,7,2,2,0,0,
  74   1,1,3,3,7,5,4,5,6,7,7,7,7,7,2,2,0,
  75   1,1,3,3,5,4,5,6,8,8,8,8,8,8,8,8,2,
  76   1,1,3,3,4,5,6,3,8,8,8,8,8,8,8,8,8,
  77   1,1,3,3,5,6,3,3,1,1,1,1,1,1,1,0,0,
  78   1,1,3,3,6,3,3,1,1,1,1,1,1,1,1,0,0,
  79   1,1,3,3,3,3,0,0,0,0,0,0,0,0,0,0,0,
  80   1,1,3,3,3,0,0,0,0,0,0,0,0,0,0,0,0,
  81   1,1,3,3,0,0,0,0,0,0,0,0,0,0,0,0,0,
  82   1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
  83   1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
  84 ];
  85 struct CC { ubyte r, g, b, a; }
  86 private static immutable CC[9] curPal = [
  87   CC(  0,  0,  0,  0),
  88   CC(  0,  0,  0,127),
  89   CC( 85,255,255,255),
  90   CC( 85, 85,255,255),
  91   CC(255, 85, 85,255),
  92   CC(170,  0,170,255),
  93   CC( 85, 85, 85,255),
  94   CC(  0,  0,  0,255),
  95   CC(  0,  0,170,255),
  96 ];
  97
  98
  99 int createCursorImage (NVGContext vg, bool white=false) {
 100   auto img = new ubyte[](curWidth*curHeight*4);
 101   scope(exit) img.destroy;
 102   const(ubyte)* s = curImg.ptr;
 103   auto d = img.ptr;
 104   foreach (immutable _; 0..curWidth*curHeight) {
 105     CC c = curPal.ptr[*s++];
 106     if (white) {
 107       if (c.a == 255) {
 108         //c = CC(255, 127, 0, 255);
 109         auto hsl = nvgRGB(c.r, c.g, c.b).asHSL;
 110         //hsl.l *= 1.25; if (hsl.l > 0.8) hsl.l = 0.8;
 111         //hsl.l *= 1.25; if (hsl.l > 1) hsl.l = 1;
 112         //hsl.h *= 2.25; if (hsl.h > 1) hsl.h = 1;
 113         hsl.h *= 0.1;
 114         auto cc = hsl.asColor.asUint;
 115         *d++ = cc&0xff; cc >>= 8;
 116         *d++ = cc&0xff; cc >>= 8;
 117         *d++ = cc&0xff; cc >>= 8;
 118         *d++ = cc&0xff; cc >>= 8;
 119       } else {
 120         *d++ = c.r;
 121         *d++ = c.g;
 122         *d++ = c.b;
 123         *d++ = c.a;
 124       }
 125     } else {
 126       *d++ = c.r;
 127       *d++ = c.g;
 128       *d++ = c.b;
 129       *d++ = c.a;
 130     }
 131   }
 132   return vg.createImageRGBA(curWidth, curHeight, img[]);
 133 }
 134
 135
 136 // ////////////////////////////////////////////////////////////////////////// //
 137 final class PopupMenu {
 138   //enum LeftX = 10;
 139   //enum TopY = 10;
 140   enum Padding = 8;
 141
 142   static struct SecInfo {
 143     int w, h;
 144     dstring s;
 145   }
 146
 147   bool hasTitle;
 148   SecInfo menuTitle;
 149   SecInfo[] items;
 150   int curItemIdx = 0;
 151   int topItemIdx = 0;
 152   int hoverItem = -1;
 153   NVGContext vg;
 154   int maxW; // maximum text width
 155   bool needRedraw;
 156   int leftX, topY;
 157   bool moving;
 158
 159   void textSize (dstring s, out int tw, out int th) {
 160     auto w = vg.bndLabelWidth(-1, s)+4;
 161     if (w > GWidth-Padding*4) w = GWidth-Padding*4;
 162     auto h = vg.bndLabelHeight(-1, s, w);
 163     if (h < BND_WIDGET_HEIGHT) h = BND_WIDGET_HEIGHT;
 164     tw = cast(int)w;
 165     th = cast(int)h;
 166   }
 167
 168   this (NVGContext avg, dstring atitle, scope dstring[] delegate () buildSections) {
 169     assert(avg !is null);
 170     vg = avg;
 171     vg.fontFaceId(uiFont);
 172     vg.textAlign(NVGTextAlign.H.Left, NVGTextAlign.V.Baseline);
 173     vg.fontSize(fsizeUI);
 174     maxW = 0;
 175     if (atitle !is null) {
 176       hasTitle = true;
 177       items.length += 1;
 178       items[0].s = atitle;
 179       textSize(atitle, items[0].w, items[0].h);
 180       maxW = items[0].w;
 181     }
 182     if (buildSections !is null) {
 183       auto list = buildSections();
 184       auto cpos = items.length;
 185       items.length += list.length;
 186       foreach (dstring s; list) {
 187         items[cpos].s = s;
 188         textSize(s, items[cpos].w, items[cpos].h);
 189         if (maxW < items[cpos].w) maxW = items[cpos].w;
 190         ++cpos;
 191       }
 192     }
 193     if (hasTitle) {
 194       menuTitle = items[0];
 195       items = items[1..$];
 196     }
 197     leftX = (GWidth-maxW-Padding*4)/2;
 198     topY = Padding;
 199     int ey = calcBotY;
 200     //topY = (GHeight-(ey-topY))/2;
 201     topY = Padding;
 202     needRedraw = true;
 203   }
 204
 205   int lastFullVisible () {
 206     if (items.length == 0) return 0;
 207     int res = topItemIdx;
 208     int y = topY+Padding+menuTitle.h;
 209     int idx = topItemIdx;
 210     if (idx < 0) idx = 0;
 211     int ey = calcBotY-Padding;
 212     while (idx < items.length) {
 213       y += items[idx].h;
 214       if (y > ey) return res;
 215       res = idx;
 216       ++idx;
 217     }
 218     return cast(int)items.length-1;
 219   }
 220
 221   int calcBotY () {
 222     int y = topY+Padding*2+menuTitle.h;
 223     foreach (const ref sc; items) {
 224       int ny = y+sc.h;
 225       if (ny > GHeight-Padding*2) return y;
 226       y = ny;
 227     }
 228     return y;
 229   }
 230
 231   void normPage () {
 232     if (curItemIdx < 0) curItemIdx = 0;
 233     if (curItemIdx >= items.length) curItemIdx = cast(int)items.length-1;
 234     if (items.length) {
 235       // make current item visible
 236       if (curItemIdx >= 0 && curItemIdx < items.length) {
 237         if (curItemIdx < topItemIdx) {
 238           topItemIdx = curItemIdx;
 239         } else {
 240           //FIXME: make this faster!
 241           //conwriteln("top=", topItemIdx, "; cur=", curItemIdx, "; lv=", lastFullVisible);
 242           while (lastFullVisible < curItemIdx) {
 243             if (topItemIdx >= items.length-1) break;
 244             ++topItemIdx;
 245           }
 246         }
 247       }
 248     }
 249     while (topItemIdx > 0) {
 250       int lv = lastFullVisible;
 251       --topItemIdx;
 252       int lv1 = lastFullVisible;
 253       if (lv1 != lv) { ++topItemIdx; break; }
 254     }
 255   }
 256
 257   void draw () {
 258     vg.save();
 259     scope(exit) vg.restore();
 260     if (moving) vg.globalAlpha(0.8);
 261     vg.fontFaceId(uiFont);
 262     vg.textAlign(NVGTextAlign.H.Left, NVGTextAlign.V.Baseline);
 263     vg.fontSize(fsizeUI);
 264     normPage();
 265     int ey = calcBotY;
 266     vg.bndMenuBackground(leftX, topY, maxW+Padding*2, ey-topY, BND_CORNER_NONE);
 267     int y = topY+Padding;
 268     vg.scissor(leftX+Padding, y, maxW, ey-Padding);
 269     if (hasTitle) {
 270       vg.bndMenuLabel(leftX+Padding, y, maxW, menuTitle.h, -1, menuTitle.s);
 271       y += menuTitle.h;
 272     }
 273     int idx = topItemIdx;
 274     if (idx < 0) idx = 0;
 275     ey -= Padding;
 276     while (idx < items.length) {
 277       vg.bndMenuItem(leftX+Padding, y, maxW, items[idx].h,
 278         (curItemIdx == idx ? BND_ACTIVE : hoverItem == idx ? BND_HOVER : BND_DEFAULT),
 279         -1, items[idx].s);
 280       y += items[idx].h;
 281       if (y >= ey) break;
 282       ++idx;
 283     }
 284     needRedraw = false;
 285   }
 286
 287   enum int Close = -666;
 288   enum int Eaten = -2;
 289   enum int NotMine = -1;
 290
 291   int onKey (KeyEvent event) {
 292     if (!event.pressed) return NotMine;
 293     switch (event.key) {
 294       case Key.Escape:
 295         return Close;
 296       case Key.Up:
 297         if (curItemIdx > 0) {
 298           needRedraw = true;
 299           --curItemIdx;
 300         }
 301         return Eaten;
 302       case Key.Down:
 303         if (curItemIdx+1 < items.length) {
 304           needRedraw = true;
 305           ++curItemIdx;
 306         }
 307         return Eaten;
 308       case Key.PageUp:
 309         if (items.length) {
 310           if (curItemIdx == topItemIdx) {
 311             while (topItemIdx > 0 && lastFullVisible != curItemIdx) --topItemIdx;
 312           }
 313           needRedraw = true;
 314           curItemIdx = topItemIdx;
 315         }
 316         return Eaten;
 317       case Key.PageDown:
 318         if (items.length) {
 319           if (curItemIdx == lastFullVisible) {
 320             while (lastFullVisible < items.length && topItemIdx != curItemIdx) ++topItemIdx;
 321           }
 322           needRedraw = true;
 323           curItemIdx = lastFullVisible;
 324         }
 325         return Eaten;
 326       case Key.Home:
 327         curItemIdx = 0;
 328         needRedraw = true;
 329         return Eaten;
 330       case Key.End:
 331         if (items.length) {
 332           curItemIdx = cast(int)items.length-1;
 333           needRedraw = true;
 334         }
 335         return Eaten;
 336       case Key.Enter:
 337         return (items.length ? curItemIdx : Close);
 338       default:
 339     }
 340     return NotMine;
 341   }
 342
 343   int onMouse (MouseEvent event) {
 344     int atItem = -1;
 345     bool inside = false;
 346     if (event.x >= leftX+Padding && event.x < leftX+Padding+maxW && event.y >= topY+Padding) {
 347       normPage();
 348       int ey = calcBotY-Padding;
 349       if (event.y < ey) {
 350         inside = true;
 351         int y = topY+Padding;
 352         if (hasTitle) y += menuTitle.h;
 353         int idx = topItemIdx;
 354         if (idx < 0) idx = 0;
 355         while (idx < items.length) {
 356           if (event.y >= y && event.y < y+items[idx].h) { atItem = idx; break; }
 357           y += items[idx].h;
 358           if (y >= ey) break;
 359           ++idx;
 360         }
 361       }
 362     }
 363     if (hoverItem != atItem) {
 364       hoverItem = atItem;
 365       needRedraw = true;
 366     }
 367     switch (event.type) {
 368       case MouseEventType.motion:
 369         if (moving) {
 370           leftX += event.dx;
 371           topY += event.dy;
 372           needRedraw = true;
 373         }
 374         break;
 375       case MouseEventType.buttonPressed:
 376         if (event.button == MouseButton.right) return Close;
 377         if (event.button == MouseButton.left) {
 378           //if (hoverItem >= 0 && hoverItem < items.length) return hoverItem;
 379           if (hoverItem >= 0 && hoverItem < items.length) {
 380             curItemIdx = hoverItem;
 381           } else {
 382             if (inside) {
 383               moving = true;
 384               needRedraw = true;
 385             }
 386           }
 387         }
 388         if (event.button == MouseButton.wheelUp) {
 389           //if (topItemIdx > 0) { --topItemIdx; needRedraw = true; }
 390           if (curItemIdx > 0) { --curItemIdx; needRedraw = true; }
 391         }
 392         if (event.button == MouseButton.wheelDown) {
 393           //if (topItemIdx < items.length) { ++topItemIdx; needRedraw = true; }
 394           if (curItemIdx < items.length) { ++curItemIdx; needRedraw = true; }
 395         }
 396         break;
 397       case MouseEventType.buttonReleased:
 398         if (event.button == MouseButton.left) {
 399           //if (curItemIdx >= 0 && curItemIdx < items.length) return curItemIdx;
 400           if (curItemIdx == hoverItem && curItemIdx >= 0 && curItemIdx < items.length) return curItemIdx;
 401           moving = false;
 402           needRedraw = true;
 403         }
 404         break;
 405       default:
 406     }
 407     return NotMine;
 408   }
 409 }