xref: /webtrees/app/Module/FanChartModule.php (revision 74d6dc0ec259c643834b111577684e38e74234c8) 
1<?php
2/**
3 * webtrees: online genealogy
4 * Copyright (C) 2019 webtrees development team
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
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 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16declare(strict_types=1);
17
18namespace Fisharebest\Webtrees\Module;
19
20use Fisharebest\Webtrees\Auth;
21use Fisharebest\Webtrees\Contracts\UserInterface;
22use Fisharebest\Webtrees\I18N;
23use Fisharebest\Webtrees\Individual;
24use Fisharebest\Webtrees\Menu;
25use Fisharebest\Webtrees\Services\ChartService;
26use Fisharebest\Webtrees\Tree;
27use Fisharebest\Webtrees\Webtrees;
28use Psr\Http\Message\ResponseInterface;
29use Psr\Http\Message\ServerRequestInterface;
30
31/**
32 * Class FanChartModule
33 */
34class FanChartModule extends AbstractModule implements ModuleChartInterface
35{
36    use ModuleChartTrait;
37
38    // Chart styles
39    private const STYLE_HALF_CIRCLE          = 2;
40    private const STYLE_THREE_QUARTER_CIRCLE = 3;
41    private const STYLE_FULL_CIRCLE          = 4;
42
43    // Limits
44    private const MINIMUM_GENERATIONS = 2;
45    private const MAXIMUM_GENERATIONS = 9;
46    private const MINIMUM_WIDTH       = 50;
47    private const MAXIMUM_WIDTH       = 500;
48
49    // Defaults
50    private const DEFAULT_STYLE       = self::STYLE_THREE_QUARTER_CIRCLE;
51    private const DEFAULT_GENERATIONS = 4;
52    private const DEFAULT_WIDTH       = 100;
53
54    /**
55     * How should this module be identified in the control panel, etc.?
56     *
57     * @return string
58     */
59    public function title(): string
60    {
61        /* I18N: Name of a module/chart */
62        return I18N::translate('Fan chart');
63    }
64
65    /**
66     * A sentence describing what this module does.
67     *
68     * @return string
69     */
70    public function description(): string
71    {
72        /* I18N: Description of the “Fan Chart” module */
73        return I18N::translate('A fan chart of an individual’s ancestors.');
74    }
75
76    /**
77     * CSS class for the URL.
78     *
79     * @return string
80     */
81    public function chartMenuClass(): string
82    {
83        return 'menu-chart-fanchart';
84    }
85
86    /**
87     * Return a menu item for this chart - for use in individual boxes.
88     *
89     * @param Individual $individual
90     *
91     * @return Menu|null
92     */
93    public function chartBoxMenu(Individual $individual): ?Menu
94    {
95        return $this->chartMenu($individual);
96    }
97
98    /**
99     * The title for a specific instance of this chart.
100     *
101     * @param Individual $individual
102     *
103     * @return string
104     */
105    public function chartTitle(Individual $individual): string
106    {
107        /* I18N: http://en.wikipedia.org/wiki/Family_tree#Fan_chart - %s is an individual’s name */
108        return I18N::translate('Fan chart of %s', $individual->fullName());
109    }
110
111    /**
112     * A form to request the chart parameters.
113     *
114     * @param ServerRequestInterface $request
115     * @param Tree                   $tree
116     * @param UserInterface          $user
117     * @param ChartService           $chart_service
118     *
119     * @return ResponseInterface
120     */
121    public function getChartAction(ServerRequestInterface $request, Tree $tree, UserInterface $user, ChartService $chart_service): ResponseInterface
122    {
123        $ajax       = (bool) $request->get('ajax');
124        $xref       = $request->get('xref', '');
125        $individual = Individual::getInstance($xref, $tree);
126
127        Auth::checkIndividualAccess($individual);
128        Auth::checkComponentAccess($this, 'chart', $tree, $user);
129
130        $chart_style = (int) $request->get('chart_style', self::DEFAULT_STYLE);
131        $fan_width   = (int) $request->get('fan_width', self::DEFAULT_WIDTH);
132        $generations = (int) $request->get('generations', self::DEFAULT_GENERATIONS);
133
134        $fan_width = min($fan_width, self::MAXIMUM_WIDTH);
135        $fan_width = max($fan_width, self::MINIMUM_WIDTH);
136
137        $generations = min($generations, self::MAXIMUM_GENERATIONS);
138        $generations = max($generations, self::MINIMUM_GENERATIONS);
139
140        if ($ajax) {
141            return $this->chart($individual, $chart_style, $fan_width, $generations, $chart_service);
142        }
143
144        $ajax_url = $this->chartUrl($individual, [
145            'ajax'        => true,
146            'chart_style' => $chart_style,
147            'fan_width'   => $fan_width,
148            'generations' => $generations,
149        ]);
150
151        return $this->viewResponse('modules/fanchart/page', [
152            'ajax_url'            => $ajax_url,
153            'chart_style'         => $chart_style,
154            'chart_styles'        => $this->chartStyles(),
155            'fan_width'           => $fan_width,
156            'generations'         => $generations,
157            'individual'          => $individual,
158            'maximum_generations' => self::MAXIMUM_GENERATIONS,
159            'minimum_generations' => self::MINIMUM_GENERATIONS,
160            'maximum_width'       => self::MAXIMUM_WIDTH,
161            'minimum_width'       => self::MINIMUM_WIDTH,
162            'module_name'         => $this->name(),
163            'title'               => $this->chartTitle($individual),
164        ]);
165    }
166
167    /**
168     * Generate both the HTML and PNG components of the fan chart
169     *
170     * @param Individual   $individual
171     * @param int          $chart_style
172     * @param int          $fan_width
173     * @param int          $generations
174     * @param ChartService $chart_service
175     *
176     * @return ResponseInterface
177     */
178    protected function chart(Individual $individual, int $chart_style, int $fan_width, int $generations, ChartService $chart_service): ResponseInterface
179    {
180        $ancestors = $chart_service->sosaStradonitzAncestors($individual, $generations);
181
182        $gen  = $generations - 1;
183        $sosa = 2 ** $generations - 1;
184
185        // fan size
186        $fanw = 640 * $fan_width / 100;
187        $cx   = $fanw / 2 - 1; // center x
188        $cy   = $cx; // center y
189        $rx   = $fanw - 1;
190        $rw   = $fanw / ($gen + 1);
191        $fanh = $fanw; // fan height
192        if ($chart_style === self::STYLE_HALF_CIRCLE) {
193            $fanh = $fanh * ($gen + 1) / ($gen * 2);
194        }
195        if ($chart_style === self::STYLE_THREE_QUARTER_CIRCLE) {
196            $fanh *= 0.86;
197        }
198        $scale = $fanw / 640;
199
200        // Create the image
201        $image = imagecreate((int) $fanw, (int) $fanh);
202
203        // Create colors
204        $transparent = imagecolorallocate($image, 0, 0, 0);
205        imagecolortransparent($image, $transparent);
206
207        $theme = app(ModuleThemeInterface::class);
208
209        $foreground = $this->imageColor($image, $theme->parameter('chart-font-color'));
210
211        $backgrounds = [
212            'M' => $this->imageColor($image, $theme->parameter('chart-background-m')),
213            'F' => $this->imageColor($image, $theme->parameter('chart-background-f')),
214            'U' => $this->imageColor($image, $theme->parameter('chart-background-u')),
215        ];
216
217        imagefilledrectangle($image, 0, 0, (int) $fanw, (int) $fanh, $transparent);
218
219        $fandeg = 90 * $chart_style;
220
221        // Popup menus for each ancestor
222        $html = '';
223
224        // Areas for the imagemap
225        $areas = '';
226
227        // loop to create fan cells
228        while ($gen >= 0) {
229            // clean current generation area
230            $deg2 = 360 + ($fandeg - 180) / 2;
231            $deg1 = $deg2 - $fandeg;
232            imagefilledarc($image, (int) $cx, (int) $cy, (int) $rx, (int) $rx, (int) $deg1, (int) $deg2, $backgrounds['U'], IMG_ARC_PIE);
233            $rx -= 3;
234
235            // calculate new angle
236            $p2    = 2 ** $gen;
237            $angle = $fandeg / $p2;
238            $deg2  = 360 + ($fandeg - 180) / 2;
239            $deg1  = $deg2 - $angle;
240            // special case for rootid cell
241            if ($gen == 0) {
242                $deg1 = 90;
243                $deg2 = 360 + $deg1;
244            }
245
246            // draw each cell
247            while ($sosa >= $p2) {
248                if ($ancestors->has($sosa)) {
249                    $person  = $ancestors->get($sosa);
250                    $name    = $person->fullName();
251                    $addname = $person->alternateName();
252
253                    $text = I18N::reverseText($name);
254                    if ($addname) {
255                        $text .= "\n" . I18N::reverseText($addname);
256                    }
257
258                    $text .= "\n" . I18N::reverseText($person->getLifeSpan());
259
260                    $background = $backgrounds[$person->sex()];
261
262                    imagefilledarc($image, (int) $cx, (int) $cy, (int) $rx, (int) $rx, (int) $deg1, (int) $deg2, $background, IMG_ARC_PIE);
263
264                    // split and center text by lines
265                    $wmax = (int) ($angle * 7 / 7 * $scale);
266                    $wmax = min($wmax, 35 * $scale);
267                    if ($gen == 0) {
268                        $wmax = min($wmax, 17 * $scale);
269                    }
270                    $text = $this->splitAlignText($text, (int) $wmax);
271
272                    // text angle
273                    $tangle = 270 - ($deg1 + $angle / 2);
274                    if ($gen == 0) {
275                        $tangle = 0;
276                    }
277
278                    // calculate text position
279                    $deg = $deg1 + 0.44;
280                    if ($deg2 - $deg1 > 40) {
281                        $deg = $deg1 + ($deg2 - $deg1) / 11;
282                    }
283                    if ($deg2 - $deg1 > 80) {
284                        $deg = $deg1 + ($deg2 - $deg1) / 7;
285                    }
286                    if ($deg2 - $deg1 > 140) {
287                        $deg = $deg1 + ($deg2 - $deg1) / 4;
288                    }
289                    if ($gen == 0) {
290                        $deg = 180;
291                    }
292                    $rad = deg2rad($deg);
293                    $mr  = ($rx - $rw / 4) / 2;
294                    if ($gen > 0 && $deg2 - $deg1 > 80) {
295                        $mr = $rx / 2;
296                    }
297                    $tx = $cx + $mr * cos($rad);
298                    $ty = $cy + $mr * sin($rad);
299                    if ($sosa == 1) {
300                        $ty -= $mr / 2;
301                    }
302
303                    // print text
304                    imagettftext(
305                        $image,
306                        7,
307                        $tangle,
308                        (int) $tx,
309                        (int) $ty,
310                        $foreground,
311                        Webtrees::ROOT_DIR . 'resources/fonts/DejaVuSans.ttf',
312                        $text
313                    );
314
315                    $areas .= '<area shape="poly" coords="';
316                    // plot upper points
317                    $mr  = $rx / 2;
318                    $deg = $deg1;
319                    while ($deg <= $deg2) {
320                        $rad   = deg2rad($deg);
321                        $tx    = round($cx + $mr * cos($rad));
322                        $ty    = round($cy + $mr * sin($rad));
323                        $areas .= "$tx,$ty,";
324                        $deg   += ($deg2 - $deg1) / 6;
325                    }
326                    // plot lower points
327                    $mr  = ($rx - $rw) / 2;
328                    $deg = $deg2;
329                    while ($deg >= $deg1) {
330                        $rad   = deg2rad($deg);
331                        $tx    = round($cx + $mr * cos($rad));
332                        $ty    = round($cy + $mr * sin($rad));
333                        $areas .= "$tx,$ty,";
334                        $deg   -= ($deg2 - $deg1) / 6;
335                    }
336                    // join first point
337                    $mr    = $rx / 2;
338                    $deg   = $deg1;
339                    $rad   = deg2rad($deg);
340                    $tx    = round($cx + $mr * cos($rad));
341                    $ty    = round($cy + $mr * sin($rad));
342                    $areas .= "$tx,$ty";
343                    // add action url
344                    $areas .= '" href="#' . $person->xref() . '"';
345                    $html  .= '<div id="' . $person->xref() . '" class="fan_chart_menu">';
346                    $html  .= '<div class="person_box"><div class="details1">';
347                    $html .= '<div class="charts">';
348                    $html  .= '<a href="' . e($person->url()) . '" class="dropdown-item">' . $name . '</a>';
349                    foreach ($theme->individualBoxMenu($person) as $menu) {
350                        $html .= '<a href="' . e($menu->getLink()) . '" class="dropdown-item p-1 ' . e($menu->getClass()) . '">' . $menu->getLabel() . '</a>';
351                    }
352                    $html  .= '</div>';
353                    $html  .= '</div></div>';
354                    $html  .= '</div>';
355                    $areas .= ' alt="' . strip_tags($person->fullName()) . '" title="' . strip_tags($person->fullName()) . '">';
356                }
357                $deg1 -= $angle;
358                $deg2 -= $angle;
359                $sosa--;
360            }
361            $rx -= $rw;
362            $gen--;
363        }
364
365        ob_start();
366        imagepng($image);
367        imagedestroy($image);
368        $png = ob_get_clean();
369
370        return response(view('modules/fanchart/chart', [
371            'fanh'  => $fanh,
372            'fanw'  => $fanw,
373            'html'  => $html,
374            'areas' => $areas,
375            'png'   => $png,
376            'title' => $this->chartTitle($individual),
377        ]));
378    }
379
380    /**
381     * split and center text by lines
382     *
383     * @param string $data   input string
384     * @param int    $maxlen max length of each line
385     *
386     * @return string $text output string
387     */
388    protected function splitAlignText(string $data, int $maxlen): string
389    {
390        $RTLOrd = [
391            215,
392            216,
393            217,
394            218,
395            219,
396        ];
397
398        $lines = explode("\n", $data);
399        // more than 1 line : recursive calls
400        if (count($lines) > 1) {
401            $text = '';
402            foreach ($lines as $line) {
403                $text .= $this->splitAlignText($line, $maxlen) . "\n";
404            }
405
406            return $text;
407        }
408        // process current line word by word
409        $split = explode(' ', $data);
410        $text  = '';
411        $line  = '';
412
413        // do not split hebrew line
414        $found = false;
415        foreach ($RTLOrd as $ord) {
416            if (strpos($data, chr($ord)) !== false) {
417                $found = true;
418            }
419        }
420        if ($found) {
421            $line = $data;
422        } else {
423            foreach ($split as $word) {
424                $len  = strlen($line);
425                $wlen = strlen($word);
426                if (($len + $wlen) < $maxlen) {
427                    if (!empty($line)) {
428                        $line .= ' ';
429                    }
430                    $line .= $word;
431                } else {
432                    $p = max(0, (int) (($maxlen - $len) / 2));
433                    if (!empty($line)) {
434                        $line = str_repeat(' ', $p) . $line; // center alignment using spaces
435                        $text .= $line . "\n";
436                    }
437                    $line = $word;
438                }
439            }
440        }
441        // last line
442        if (!empty($line)) {
443            $len = strlen($line);
444            if (in_array(ord($line{0}), $RTLOrd)) {
445                $len /= 2;
446            }
447            $p    = max(0, (int) (($maxlen - $len) / 2));
448            $line = str_repeat(' ', $p) . $line; // center alignment using spaces
449            $text .= $line;
450        }
451
452        return $text;
453    }
454
455    /**
456     * Convert a CSS color into a GD color.
457     *
458     * @param resource $image
459     * @param string   $css_color
460     *
461     * @return int
462     */
463    protected function imageColor($image, string $css_color): int
464    {
465        return imagecolorallocate(
466            $image,
467            (int) hexdec(substr($css_color, 0, 2)),
468            (int) hexdec(substr($css_color, 2, 2)),
469            (int) hexdec(substr($css_color, 4, 2))
470        );
471    }
472
473    /**
474     * This chart can display its output in a number of styles
475     *
476     * @return array
477     */
478    protected function chartStyles(): array
479    {
480        return [
481            /* I18N: layout option for the fan chart */
482            self::STYLE_HALF_CIRCLE          => I18N::translate('half circle'),
483            /* I18N: layout option for the fan chart */
484            self::STYLE_THREE_QUARTER_CIRCLE => I18N::translate('three-quarter circle'),
485            /* I18N: layout option for the fan chart */
486            self::STYLE_FULL_CIRCLE          => I18N::translate('full circle'),
487        ];
488    }
489}
490