292 lines
8.6 KiB
PHP
292 lines
8.6 KiB
PHP
<?php
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declare(strict_types=1);
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namespace App\Services;
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/**
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* Petit générateur PDF autonome, volontairement limité aux besoins des plannings.
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* Il utilise les polices standard PDF Helvetica / Helvetica-Bold et ne requiert
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* aucune dépendance Composer.
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*/
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final class SimplePdf
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{
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public const A4_LANDSCAPE_WIDTH = 841.89;
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public const A4_LANDSCAPE_HEIGHT = 595.28;
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/** @var array<int, string> */
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private array $pages = [];
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private string $currentPage = '';
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public function __construct(
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private float $width = self::A4_LANDSCAPE_WIDTH,
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private float $height = self::A4_LANDSCAPE_HEIGHT,
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) {
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$this->addPage();
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}
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public function width(): float
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{
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return $this->width;
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}
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public function height(): float
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{
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return $this->height;
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}
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public function addPage(): void
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{
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if ($this->currentPage !== '') {
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$this->pages[] = $this->currentPage;
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}
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$this->currentPage = '';
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}
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public function text(float $x, float $y, string $text, float $size = 10, bool $bold = false): void
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{
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$font = $bold ? 'F2' : 'F1';
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$encoded = $this->escapeText($text);
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$pdfY = $this->height - $y;
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$this->currentPage .= sprintf(
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"BT /%s %.2F Tf 1 0 0 1 %.2F %.2F Tm (%s) Tj ET\n",
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$font,
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$size,
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$x,
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$pdfY,
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$encoded
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);
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}
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public function line(float $x1, float $y1, float $x2, float $y2, float $gray = 0.75): void
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{
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$this->currentPage .= sprintf(
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"%.3F G %.2F %.2F m %.2F %.2F l S\n",
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$gray,
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$x1,
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$this->height - $y1,
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$x2,
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$this->height - $y2
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);
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}
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public function rect(float $x, float $y, float $w, float $h, float $strokeGray = 0.75): void
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{
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$this->currentPage .= sprintf(
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"%.3F G %.2F %.2F %.2F %.2F re S\n",
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$strokeGray,
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$x,
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$this->height - $y - $h,
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$w,
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$h
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);
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}
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public function fillRect(float $x, float $y, float $w, float $h, float $gray = 0.95): void
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{
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$this->currentPage .= sprintf(
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"%.3F g %.2F %.2F %.2F %.2F re f 0 g\n",
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$gray,
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$x,
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$this->height - $y - $h,
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$w,
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$h
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);
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}
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public function fillRectColor(float $x, float $y, float $w, float $h, string $hex): void
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{
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[$r, $g, $b] = $this->hexToRgb($hex);
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$this->currentPage .= sprintf(
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"%.3F %.3F %.3F rg %.2F %.2F %.2F %.2F re f 0 g\n",
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$r,
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$g,
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$b,
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$x,
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$this->height - $y - $h,
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$w,
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$h
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);
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}
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public function rectColor(float $x, float $y, float $w, float $h, string $hex, float $lineWidth = 1.0): void
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{
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[$r, $g, $b] = $this->hexToRgb($hex);
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$this->currentPage .= sprintf(
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"%.3F %.3F %.3F RG %.2F w %.2F %.2F %.2F %.2F re S 0 G 1 w\n",
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$r,
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$g,
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$b,
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$lineWidth,
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$x,
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$this->height - $y - $h,
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$w,
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$h
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);
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}
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public function textColor(float $x, float $y, string $text, string $hex, float $size = 10, bool $bold = false): void
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{
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[$r, $g, $b] = $this->hexToRgb($hex);
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$font = $bold ? 'F2' : 'F1';
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$encoded = $this->escapeText($text);
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$pdfY = $this->height - $y;
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$this->currentPage .= sprintf(
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"BT %.3F %.3F %.3F rg /%s %.2F Tf 1 0 0 1 %.2F %.2F Tm (%s) Tj ET 0 g\n",
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$r,
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$g,
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$b,
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$font,
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$size,
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$x,
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$pdfY,
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$encoded
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);
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}
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/**
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* @return string[]
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*/
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public function wrap(string $text, float $maxWidth, float $fontSize = 9): array
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{
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$text = trim(preg_replace('/\s+/u', ' ', $text) ?? $text);
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if ($text === '') {
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return [''];
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}
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// Helvetica moyenne : environ 0,52 em par caractère. Une estimation
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// conservatrice évite les débordements sans embarquer les métriques AFM.
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$maxChars = max(4, (int) floor($maxWidth / max(1.0, $fontSize * 0.52)));
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$words = preg_split('/\s+/u', $text) ?: [$text];
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$lines = [];
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$line = '';
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foreach ($words as $word) {
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$candidate = $line === '' ? $word : $line . ' ' . $word;
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if ($this->stringLength($candidate) <= $maxChars) {
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$line = $candidate;
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continue;
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}
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if ($line !== '') {
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$lines[] = $line;
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}
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while ($this->stringLength($word) > $maxChars) {
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$lines[] = $this->stringSlice($word, 0, $maxChars);
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$word = $this->stringSlice($word, $maxChars);
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}
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$line = $word;
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}
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if ($line !== '') {
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$lines[] = $line;
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}
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return $lines ?: [''];
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}
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public function output(): string
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{
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if ($this->currentPage !== '' || $this->pages === []) {
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$this->pages[] = $this->currentPage;
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$this->currentPage = '';
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}
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$objects = [];
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$objects[1] = '<< /Type /Catalog /Pages 2 0 R >>';
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$objects[3] = '<< /Type /Font /Subtype /Type1 /BaseFont /Helvetica /Encoding /WinAnsiEncoding >>';
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$objects[4] = '<< /Type /Font /Subtype /Type1 /BaseFont /Helvetica-Bold /Encoding /WinAnsiEncoding >>';
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$pageObjectIds = [];
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$nextObjectId = 5;
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foreach ($this->pages as $content) {
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$pageObjectId = $nextObjectId++;
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$contentObjectId = $nextObjectId++;
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$pageObjectIds[] = $pageObjectId;
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$objects[$pageObjectId] = sprintf(
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'<< /Type /Page /Parent 2 0 R /MediaBox [0 0 %.2F %.2F] /Resources << /Font << /F1 3 0 R /F2 4 0 R >> >> /Contents %d 0 R >>',
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$this->width,
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$this->height,
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$contentObjectId
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);
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$objects[$contentObjectId] = "<< /Length " . strlen($content) . ">>\nstream\n" . $content . "endstream";
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}
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$kids = implode(' ', array_map(static fn (int $id): string => $id . ' 0 R', $pageObjectIds));
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$objects[2] = sprintf('<< /Type /Pages /Kids [%s] /Count %d >>', $kids, count($pageObjectIds));
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ksort($objects);
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$pdf = "%PDF-1.4\n%\xE2\xE3\xCF\xD3\n";
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$offsets = [0 => 0];
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foreach ($objects as $id => $body) {
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$offsets[$id] = strlen($pdf);
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$pdf .= $id . " 0 obj\n" . $body . "\nendobj\n";
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}
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$xrefOffset = strlen($pdf);
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$maxObjectId = max(array_keys($objects));
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$pdf .= "xref\n0 " . ($maxObjectId + 1) . "\n";
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$pdf .= "0000000000 65535 f \n";
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for ($id = 1; $id <= $maxObjectId; $id++) {
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$offset = $offsets[$id] ?? 0;
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$pdf .= sprintf('%010d 00000 n ', $offset) . "\n";
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}
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$pdf .= "trailer\n<< /Size " . ($maxObjectId + 1) . " /Root 1 0 R >>\n";
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$pdf .= "startxref\n" . $xrefOffset . "\n%%EOF";
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return $pdf;
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}
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private function stringLength(string $value): int
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{
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return function_exists('mb_strlen') ? mb_strlen($value, 'UTF-8') : strlen($value);
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}
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private function stringSlice(string $value, int $start, ?int $length = null): string
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{
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if (function_exists('mb_substr')) {
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return mb_substr($value, $start, $length, 'UTF-8');
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}
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return $length === null ? substr($value, $start) : substr($value, $start, $length);
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}
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/** @return array{0:float,1:float,2:float} */
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private function hexToRgb(string $hex): array
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{
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$hex = ltrim(trim($hex), '#');
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if (strlen($hex) === 3) {
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$hex = $hex[0] . $hex[0] . $hex[1] . $hex[1] . $hex[2] . $hex[2];
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}
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if (!preg_match('/^[0-9a-fA-F]{6}$/', $hex)) {
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$hex = '000000';
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}
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return [
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hexdec(substr($hex, 0, 2)) / 255,
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hexdec(substr($hex, 2, 2)) / 255,
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hexdec(substr($hex, 4, 2)) / 255,
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];
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}
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private function escapeText(string $text): string
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{
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$converted = function_exists('iconv')
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? iconv('UTF-8', 'Windows-1252//TRANSLIT//IGNORE', $text)
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: false;
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if ($converted === false) {
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$converted = preg_replace('/[^\x20-\x7E]/', '?', $text) ?? $text;
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}
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return str_replace(
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['\\', '(', ')', "\r", "\n"],
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['\\\\', '\\(', '\\)', '', ' '],
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$converted
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);
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}
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}
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