3 * Purpose: Draw delimiters and decorations
4 * Author: Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
5 * Created: January 1996
6 * Description: Vectorial fonts for simple and resizable objets.
8 * Dependencies: Xlib, XForms
10 * Copyright: 1996, Alejandro Aguilar Sierra
12 * Version: 0.8beta, Mathed & Lyx project.
14 * You are free to use and modify this code under the terms of
15 * the GNU General Public Licence version 2 or later.
20 #include FORMS_H_LOCATION
23 #include "symbol_def.h"
24 #include "math_inset.h"
29 using std::lower_bound;
32 * Internal struct of a drawing: code n x1 y1 ... xn yn, where code is:
33 * 0 = end, 1 = line, 2 = polyline, 3 = square line, 4= square polyline
36 static float parenth[] = {
38 0.9930, 0.0071, 0.7324, 0.0578, 0.5141, 0.1126, 0.3380, 0.1714,
39 0.2183, 0.2333, 0.0634, 0.3621, 0.0141, 0.5000, 0.0563, 0.6369,
40 0.2113, 0.7647, 0.3310, 0.8276, 0.5070, 0.8864, 0.7254, 0.9412,
45 static float parenthHigh[] = {
46 2.0, 13.0, 0.9840, 0.0014, 0.7143, 0.0323, 0.4603, 0.0772, 0.2540,
47 0.1278, 0.1746, 0.1966, 0.0952, 0.3300, 0.0950, 0.5000, 0.0952, 0.6700,
48 0.1746, 0.8034, 0.2540, 0.8722, 0.4603, 0.9228, 0.7143, 0.9677, 0.9840,
52 static float brace[] = {
54 0.9492, 0.0020, 0.9379, 0.0020, 0.7458, 0.0243, 0.5819, 0.0527,
55 0.4859, 0.0892, 0.4463, 0.1278, 0.4463, 0.3732, 0.4011, 0.4199,
56 0.2712, 0.4615, 0.0734, 0.4919, 0.0113, 0.5000, 0.0734, 0.5081,
57 0.2712, 0.5385, 0.4011, 0.5801, 0.4463, 0.6268, 0.4463, 0.8722,
58 0.4859, 0.9108, 0.5819, 0.9473, 0.7458, 0.9757, 0.9379, 0.9980,
63 static float arrow[] = {
65 0.015, 0.7500, 0.2, 0.6, 0.35, 0.35, 0.5, 0.05,
66 0.65, 0.35, 0.8, 0.6, 0.95, 0.7500,
67 3, 0.5, 0.15, 0.5, 0.95,
71 static float Arrow[] = {
73 0.015, 0.7500, 0.2, 0.6, 0.35, 0.35, 0.5, 0.05,
74 0.65, 0.35, 0.8, 0.6, 0.95, 0.7500,
75 3, 0.35, 0.5, 0.35, 0.95,
76 3, 0.65, 0.5, 0.65, 0.95,
80 static float udarrow[] = {
82 0.015, 0.25, 0.5, 0.05, 0.95, 0.25,
84 0.015, 0.75, 0.5, 0.95, 0.95, 0.75,
85 1, 0.5, 0.2, 0.5, 0.8,
89 static float Udarrow[] = {
91 0.015, 0.25, 0.5, 0.05, 0.95, 0.25,
93 0.015, 0.75, 0.5, 0.95, 0.95, 0.75,
94 1, 0.35, 0.2, 0.35, 0.8,
95 1, 0.65, 0.2, 0.65, 0.8,
99 static float brack[] = {
101 0.95, 0.05, 0.05, 0.05, 0.05, 0.95, 0.95, 0.95,
105 static float corner[] = {
107 0.95, 0.05, 0.05, 0.05, 0.05, 0.95,
111 static float angle[] = {
113 1, 0, 0.05, 0.5, 1, 1,
117 static float slash[] = {
118 1, 0.95, 0.05, 0.05, 0.95,
122 static float hline[] = {
123 1, 0.05, 0.5, 0.95, 0.5,
128 static float hline2[] = {
129 1, 0.1, 0.5, 0.3, 0.5,
130 1, 0.7, 0.5, 0.9, 0.5,
134 static float hline3[] = {
136 1, 0.475, 0, 0.525, 0,
142 static float dline3[] = {
143 1, 0.1, 0.1, 0.15, 0.15,
144 1, 0.475, 0.475, 0.525, 0.525,
145 1, 0.85, 0.85, 0.9, 0.9,
149 static float hlinesmall[] = {
150 1, 0.4, 0.5, 0.6, 0.5,
154 static float vert[] = {
155 1, 0.5, 0.05, 0.5, 0.95,
159 static float Vert[] = {
160 1, 0.3, 0.05, 0.3, 0.95,
161 1, 0.7, 0.05, 0.7, 0.95,
165 static float tilde[] = {
167 0.05, 0.8, 0.25, 0.2, 0.75, 0.8, 0.95, 0.2,
171 struct math_deco_struct {
178 math_deco_struct math_deco_table[] = {
181 { LM_widehat, &angle[0], 3 },
182 { LM_widetilde, &tilde[0], 0 },
183 { LM_underline, &hline[0], 0 },
184 { LM_overline, &hline[0], 0 },
185 { LM_underbrace, &brace[0], 1 },
186 { LM_overbrace, &brace[0], 3 },
187 { LM_overleftarrow, &arrow[0], 1 },
188 { LM_overightarrow, &arrow[0], 3 },
191 { '(', &parenth[0], 0 },
192 { ')', &parenth[0], 2 },
193 { '{', &brace[0], 0 },
194 { '}', &brace[0], 2 },
195 { '[', &brack[0], 0 },
196 { ']', &brack[0], 2 },
197 { '|', &vert[0], 0 },
198 { '/', &slash[0], 0 },
199 { LM_Vert, &Vert[0], 0 },
200 { LM_backslash, &slash[0], 1 },
201 { LM_langle, &angle[0], 0 },
202 { LM_lceil, &corner[0], 0 },
203 { LM_lfloor, &corner[0], 1 },
204 { LM_rangle, &angle[0], 2 },
205 { LM_rceil, &corner[0], 3 },
206 { LM_rfloor, &corner[0], 2 },
207 { LM_downarrow, &arrow[0], 2 },
208 { LM_Downarrow, &Arrow[0], 2 },
209 { LM_uparrow, &arrow[0], 0 },
210 { LM_Uparrow, &Arrow[0], 0 },
211 { LM_updownarrow, &udarrow[0], 0 },
212 { LM_Updownarrow, &Udarrow[0], 0 },
215 { LM_ddot, &hline2[0], 0 },
216 { LM_hat, &angle[0], 3 },
217 { LM_grave, &slash[0], 1 },
218 { LM_acute, &slash[0], 0 },
219 { LM_tilde, &tilde[0], 0 },
220 { LM_bar, &hline[0], 0 },
221 { LM_dot, &hlinesmall[0], 0 },
222 { LM_check, &angle[0], 1 },
223 { LM_breve, &parenth[0], 1 },
224 { LM_vec, &arrow[0], 3 },
225 { LM_not, &slash[0], 0 },
228 { LM_ldots, &hline3[0], 0 },
229 { LM_cdots, &hline3[0], 0 },
230 { LM_vdots, &hline3[0], 1 },
231 { LM_ddots, &dline3[0], 0 }
236 int odd(int x) { return ((x) & 1); }
238 typedef float matriz_data[2][2];
240 const matriz_data MATIDEN= { {1, 0}, {0, 1}};
242 extern int mathed_char_width(short type, int style, byte c);
243 extern int mathed_char_height(short, int, byte, int &, int &);
245 #define mateq(m1, m2) memcpy(m1, m2, sizeof(matriz_data))
249 Matriz() { mateq(m, MATIDEN); }
251 void escala(float, float);
252 void transf(float, float, float &, float &);
256 void matmat(matriz_data & a);
260 void Matriz::rota(int code)
266 cs = (odd(code)) ? 0: 1 - code;
267 sn = (odd(code)) ? 2 - code: 0;
268 r[0][0] = cs; r[0][1] = sn;
269 r[1][0] = -r[0][1]; r[1][1] = r[0][0];
273 void Matriz::escala(float x, float y)
277 s[0][0] = x; s[1][1] = y;
282 void Matriz::matmat(matriz_data & a)
285 for (int i = 0;i < 2; ++i) {
286 c[0][i] = a[0][0] * m[0][i] + a[0][1] * m[1][i];
287 c[1][i] = a[1][0] * m[0][i] + a[1][1] * m[1][i];
292 void Matriz::transf(float xp, float yp, float & x, float & y)
294 x = m[0][0] * xp + m[0][1] * yp;
295 y = m[1][0] * xp + m[1][1] * yp;
299 struct math_deco_compare {
302 int operator()(math_deco_struct const & a,
303 math_deco_struct const & b) const {
304 return a.code < b.code;
306 /// for use by lower_bound
308 int operator()(math_deco_struct const & a, int b) const {
315 int const math_deco_table_size = sizeof(math_deco_table) /sizeof(math_deco_struct);
317 class init_deco_table {
321 sort(math_deco_table,
322 math_deco_table + math_deco_table_size,
323 math_deco_compare());
324 init_deco_table::init == true;
331 bool init_deco_table::init = false;
332 static init_deco_table idt;
335 int search_deco(int code)
337 math_deco_struct * res =
338 lower_bound(math_deco_table,
339 math_deco_table + math_deco_table_size,
340 code, math_deco_compare());
341 if (res != math_deco_table + math_deco_table_size &&
343 return res - math_deco_table;
348 void mathed_draw_deco(Painter & pain, int x, int y, int w, int h, int code)
351 float xx, yy, x2, y2;
354 int j = search_deco(code);
357 int r = math_deco_table[j].angle;
358 float * d = math_deco_table[j].data;
360 if (h > 70 && (math_deco_table[j].code == int('(')
361 || math_deco_table[j].code == int(')')))
367 int n = (w < h) ? w: h;
370 if (r > 0 && r < 3) y += h;
379 xx = d[i++]; yy = d[i++];
380 x2 = d[i++]; y2 = d[i++];
382 sqmt.transf(xx, yy, xx, yy);
384 mt.transf(xx, yy, xx, yy);
385 mt.transf(x2, y2, x2, y2);
386 pain.line(x + int(xx), y + int(yy),
387 x + int(x2), y + int(y2),
396 for (j = 0; j < n; ++j) {
397 xx = d[i++]; yy = d[i++];
398 // lyxerr << " " << xx << " " << yy << " ";
400 sqmt.transf(xx, yy, xx, yy);
402 mt.transf(xx, yy, xx, yy);
405 // lyxerr << "P[" << j " " << xx << " " << yy << " " << x << " " << y << "]";
407 pain.lines(xp, yp, n, LColor::mathline);
415 MathDelimInset::draw(Painter & pain, int x, int y)
418 MathParInset::draw(pain, x + dw + 2, y - dh);
421 pain.line(x + 4, yo - ascent,
423 LColor::mathcursor, Painter::line_onoffdash);
425 mathed_draw_deco(pain, x, y - ascent, dw, Height(), left);
426 x += Width() - dw - 2;
428 pain.line(x + 4, yo - ascent,
430 LColor::mathcursor, Painter::line_onoffdash);
432 mathed_draw_deco(pain, x, y-ascent, dw, Height(), right);
437 MathDelimInset::Metrics()
439 MathParInset::Metrics();
442 mathed_char_height(LM_TC_CONST, size, 'I', d, dh);
447 if (dw > 15) dw = 15;
454 MathDecorationInset::draw(Painter & pain, int x, int y)
456 MathParInset::draw(pain, x + (width - dw) / 2, y);
457 mathed_draw_deco(pain, x, y + dy, width, dh, deco);
462 MathDecorationInset::Metrics()
464 int h = 2*mathed_char_height(LM_TC_VAR, size, 'I', ascent, descent);
465 MathParInset::Metrics();
484 MathAccentInset::draw(Painter & pain, int x, int y)
489 inset->draw(pain, x, y);
491 drawStr(pain, fn, size, x, y, &c, 1);
493 x += (code == LM_not) ? (width-dw) / 2 : 2;
494 mathed_draw_deco(pain, x, y - dy, dw, dh, code);
499 MathAccentInset::Metrics()
504 ascent = inset->Ascent();
505 descent = inset->Descent();
506 width = inset->Width();
509 mathed_char_height(fn, size, c, ascent, descent);
510 width = mathed_char_width(fn, size, c);
513 if (code == LM_not) {
521 // if (MathIsBinary(fn))
522 // width += 2*mathed_char_width(fn, size, ' ');
527 MathDotsInset::draw(Painter & pain, int x, int y)
529 mathed_draw_deco(pain, x + 2, y - dh, width - 2, ascent, code);
530 if (code == LM_vdots || code == LM_ddots) ++x;
531 if (code != LM_vdots) --y;
532 mathed_draw_deco(pain, x + 2, y - dh, width - 2, ascent, code);
537 MathDotsInset::Metrics()
539 mathed_char_height(LM_TC_VAR, size, 'M', ascent, descent);
540 width = mathed_char_width(LM_TC_VAR, size, 'M');
542 case LM_ldots: dh = 0; break;
543 case LM_cdots: dh = ascent/2; break;
544 case LM_vdots: width /= 2;
545 case LM_ddots: dh = ascent; break;