vrheights: ffb62c8db542 src/console.cc

vrheights

view src/console.cc @ 15:ffb62c8db542

added missing makefile

author	John Tsiombikas <nuclear@member.fsf.org>
date	Fri, 30 Oct 2015 05:40:22 +0200
parents
children	7f6d68d95c22

line source

1 #include <stdio.h>

2 #include <stdlib.h>

3 #include <string.h>

4 #include <stdarg.h>

5 #include <assert.h>

6 #include <algorithm>

7 #include "opengl.h"

8 #include "console.h"

10 Console::Console()

11 : prompt("> ")

12 {

13 visible = false;

14 nlines = 16;

15 ncolumns = 80;

16 pos_x = pos_y = 0;

17 anchor = TOP_LEFT;

19 inpq_front = inpq_back = 0;

21 max_hist_lines = 64;

22 max_output_lines = 128;

24 hist_iter_valid = false;

26 echo = true;

27 font = 0;

28 font_size = 0;

30 cursor = 0;

31 input_win = 0;

32 }

34 void Console::set_cursor(int x)

35 {

36 if(x < 0 || x > (int)input.size()) {

37 return;

38 }

39 cursor = x;

41 int max_chars = ncolumns - (int)prompt.size() - 1;

43 if(cursor < input_win) {

44 input_win = cursor;

45 } else if(cursor > input_win + max_chars) {

46 input_win = std::max(cursor - max_chars, 0);

47 }

48 }

50 int Console::get_cursor() const

51 {

52 return cursor;

53 }

55 void Console::set_font(dtx_font *font, int sz)

56 {

57 this->font = font;

58 font_size = sz;

59 }

61 void Console::set_history_size(int hsz)

62 {

63 max_hist_lines = hsz;

65 int drop = hist.size() - hsz;

66 if(drop > 0) {

67 auto it = hist.begin();

68 for(int i=0; i<drop; i++) {

69 ++it;

70 }

71 hist.erase(hist.begin(), it);

72 }

73 }

75 void Console::set_output_buffer_size(int sz)

76 {

77 max_output_lines = sz;

79 int drop = output.size() - sz;

80 if(drop > 0) {

81 output.erase(output.begin(), output.begin() + drop);

82 }

83 }

85 void Console::set_command_func(std::function<void (const char*)> func)

86 {

87 cmd_handler = func;

88 }

90 void Console::set_echo(bool echo)

91 {

92 this->echo = echo;

93 }

95 bool Console::get_echo() const

96 {

97 return echo;

98 }

100 void Console::set_visible(bool v)

101 {

102 visible = v;

103 }

104

105 bool Console::is_visible() const

106 {

107 return visible;

108 }

109

110 void Console::set_size(int lines, int columns)

111 {

112 nlines = lines;

113 ncolumns = columns;

114 }

115

116 int Console::get_size_lines() const

117 {

118 return nlines;

119 }

120

121 int Console::get_size_columns() const

122 {

123 return ncolumns;

124 }

125

126 void Console::set_position(int x, int y, Anchor anchor)

127 {

128 pos_x = x;

129 pos_y = y;

130 this->anchor = anchor;

131 }

132

133 bool Console::update()

134 {

135 bool must_redraw = false;

136

137 while(inpq_front != inpq_back) {

138 int c = keybuf[inpq_front];

139 inpq_front = (inpq_front + 1) % INPUTQ_SIZE;

140

141 switch(c) {

142 case '\n':

143 case '\r':

144 if(echo) {

145 puts(input.c_str());

146 putchar('\n');

147 }

148 if(!input.empty() && cmd_handler) {

149 cmd_handler(input.c_str());

150 }

151

152 hist.push_back(std::move(input)); // move the input string into the history buffer

153 if((int)hist.size() > max_hist_lines) {

154 hist.pop_front();

155 }

156 hist_iter_valid = false;

157

158 set_cursor(0);

159 must_redraw = true;

160 break;

161

162 case '\t':

163 // TODO: completion

164 break;

165

166 case '\b':

167 if(!input.empty()) {

168 if(cursor == (int)input.size()) {

169 input.pop_back();

170 set_cursor(get_cursor() - 1);

171 must_redraw = true;

172 } else if(cursor > 0) {

173 input.erase(cursor - 1, 1);

174 set_cursor(get_cursor() - 1);

175 must_redraw = true;

176 }

177 }

178 break;

179

180 case KEY_UP:

181 if(!hist.empty()) {

182 if(!hist_iter_valid) {

183 hist_iter = hist.rbegin();

184 hist_iter_valid = true;

185 input = *hist_iter;

186 } else {

187 if(++hist_iter == hist.rend()) {

188 --hist_iter;

189 break;

190 }

191 input = *hist_iter;

192 }

193 set_cursor(input.size());

194 }

195 break;

196

197 case KEY_DOWN:

198 if(!hist.empty()) {

199 if(!hist_iter_valid) {

200 hist_iter = hist.rbegin();

201 hist_iter_valid = true;

202 }

203 if(hist_iter != hist.rbegin()) {

204 input = *--hist_iter;

205 set_cursor(input.size());

206 }

207 }

208 break;

209

210 case KEY_LEFT:

211 if(cursor > 0) {

212 set_cursor(get_cursor() - 1);

213 must_redraw = true;

214 }

215 break;

216

217 case KEY_RIGHT:

218 if(cursor < (int)input.size()) {

219 set_cursor(get_cursor() + 1);

220 must_redraw = true;

221 }

222 break;

223

224 case KEY_HOME:

225 set_cursor(0);

226 must_redraw = true;

227 break;

228

229 case KEY_END:

230 set_cursor(input.size());

231 must_redraw = true;

232 break;

233

234 case KEY_PGUP:

235 case KEY_PGDOWN:

236 // TODO scroll output buffer

237 break;

238

239 default:

240 if(c < 256 && isprint(c)) {

241 if(cursor == (int)input.size()) {

242 input.push_back(c);

243 } else {

244 input.insert(cursor, 1, c);

245 }

246 set_cursor(get_cursor() + 1);

247 must_redraw = true;

248 }

249 }

250 }

251 return must_redraw;

252 }

253

254 void Console::draw() const

255 {

256 if(!font || !visible) return;

257 dtx_use_font(font, font_size);

258

259 std::string buflines;

260

261 int num_lines = std::min(nlines, (int)output.size());

262 auto it = output.cbegin() + (output.size() - num_lines);

263

264 float max_width = dtx_glyph_width('Q') * ncolumns;

265

266 while(it != output.cend()) {

267 const std::string &line = *it++;

268 buflines += line + std::string("\n");

269

270 //max_width = std::max(max_width, dtx_string_width(line.c_str()));

271 }

272

273 // draw the output box

274 float line_height = dtx_line_height();

275 float outbox_height = nlines * line_height;

276 float console_height = outbox_height + line_height * 1.5;

277

278

279 int vp[4];

280 glGetIntegerv(GL_VIEWPORT, vp);

281

282 int px, py;

283 switch(anchor) {

284 case TOP_LEFT:

285 px = pos_x;

286 py = pos_y;

287 break;

288

289 case BOTTOM_LEFT:

290 px = pos_x;

291 py = vp[3] - console_height - pos_y;

292 break;

293

294 case CENTER:

295 px = (vp[2] - max_width) / 2 + pos_x;

296 py = (vp[3] - console_height) / 2 + pos_y;

297 break;

298 }

299

300 glMatrixMode(GL_PROJECTION);

301 glPushMatrix();

302 glLoadIdentity();

303 glOrtho(0, vp[2], 0, vp[3], -1, 1);

304

305 glMatrixMode(GL_MODELVIEW);

306 glPushMatrix();

307 glLoadIdentity();

308 glTranslatef(px, vp[3] - py, 0);

309

310

311 glPushAttrib(GL_ENABLE_BIT);

312 glDisable(GL_DEPTH_TEST);

313 glDisable(GL_LIGHTING);

314 glDisable(GL_STENCIL_TEST);

315 glEnable(GL_BLEND);

316 glDisable(GL_TEXTURE_2D);

317 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

318

319 glEnable(GL_SCISSOR_TEST);

320 glScissor(vp[0] + px, vp[1] + (vp[3] - py) - console_height, max_width, console_height);

321

322 glBegin(GL_QUADS);

323 glColor4f(0.1, 0.2, 0.5, 0.7);

324 glVertex2f(0, -outbox_height);

325 glVertex2f(max_width, -outbox_height);

326 glVertex2f(max_width, 0);

327 glVertex2f(0, 0);

328

329 glColor4f(0.5, 0.2, 0.1, 0.7);

330 glVertex2f(0, -console_height);

331 glVertex2f(max_width, -console_height);

332 glVertex2f(max_width, -outbox_height);

333 glVertex2f(0, -outbox_height);

334 glEnd();

335

336 // draw the output text

337 glPushMatrix();

338 glTranslatef(0, -line_height, 0);

339 glColor4f(1, 1, 1, 0.7);

340 dtx_string(buflines.c_str());

341 glPopMatrix();

342

343 // draw the input line

344 glTranslatef(0, -outbox_height - line_height, 0);

345

346 std::string inpline = prompt + input.substr(input_win);

347 dtx_string(inpline.c_str());

348 glDisable(GL_TEXTURE_2D);

349

350 float cursor_x = dtx_char_pos(inpline.c_str(), cursor - input_win + prompt.size());

351 glBegin(GL_QUADS);

352 glColor4f(1, 1, 1, 0.7);

353 glVertex2f(cursor_x, -2);

354 glVertex2f(cursor_x + 2, -2);

355 glVertex2f(cursor_x + 2, line_height - 2);

356 glVertex2f(cursor_x, line_height - 2);

357 glEnd();

358

359 glPopAttrib();

360

361 glMatrixMode(GL_PROJECTION);

362 glPopMatrix();

363 glMatrixMode(GL_MODELVIEW);

364 glPopMatrix();

365 }

366

367 void Console::input_key(int key)

368 {

369 keybuf[inpq_back] = key;

370 inpq_back = (inpq_back + 1) % INPUTQ_SIZE;

371 }

372

373 void Console::putchar(char c)

374 {

375 if(output.empty()) {

376 output.push_back(std::string(""));

377 }

378

379 if(c == '\n' || c == '\r') {

380 output.push_back(std::string(""));

381 if((int)output.size() > max_output_lines) {

382 output.erase(output.begin());

383 }

384 } else {

385 output.back().push_back(c);

386 }

387 }

388

389 void Console::puts(const char *str)

390 {

391 while(*str) {

392 putchar(*str++);

393 }

394 }

395

396 void Console::printf(const char *fmt, ...)

397 {

398 static char buf[1024];

399 va_list ap;

400

401 va_start(ap, fmt);

402 vsnprintf(buf, sizeof buf, fmt, ap);

403 va_end(ap);

404

405 puts(buf);

406 }

407

408 void Console::debug()

409 {

410 fprintf(stderr, "visible: %s\n", visible ? "true" : "false");

411 fprintf(stderr, "size: %d lines x %d columns\n", nlines, ncolumns);

412 fprintf(stderr, "cursor: %d\n", cursor);

413

414 int qsize = 0;

415 int qidx = inpq_front;

416 while(qidx != inpq_back) {

417 qsize++;

418 qidx = (qidx + 1) % INPUTQ_SIZE;

419 }

420

421 fprintf(stderr, "input queue size: %d\n", qsize);

422 fprintf(stderr, "current input line: \"%s\"\n", input.c_str());

423 fprintf(stderr, "%d saved inputs in the history (max %d)\n", (int)hist.size(), max_hist_lines);

424 auto it = hist.begin();

425 int idx = 0;

426 while(it != hist.end()) {

427 fprintf(stderr, " h(%d): \"%s\"\n", idx++, it++->c_str());

428 }

429

430 fprintf(stderr, "output buffer (lines: %d/%d):\n", (int)output.size(), max_output_lines);

431 for(size_t i=0; i<output.size(); i++) {

432 fprintf(stderr, "o(%d): \"%s\"\n", (int)i, output[i].c_str());

433 }

434 }