kantarciandClaude Opus 5
23fdca4edb
Umut on the DEEG hero image: "It should be rounded, but it was done from somewhere, and the corners look odd. And the editor has no image corner rounding at all, does it?" It did have one - per block, under Design > Bild > Bildecken. What it did not have was the 12px that enhancements.css set on .block-image for every installation: rounded on screen, present in no field, and only removable by overriding it on each block. On a template that is square throughout it shows, because the elements above the image - the gradient, the sign, the blue call to action - are square and stick out of the rounded corner. The radius is now theme.base.imageRadius, validated like the container width, emitted as --k-image-radius and used by the stylesheet. The default stays 12px so existing sites look the same; 0px makes every image square. The per-block setting still wins. DEEG is set to 0px, in the seed script and in the installation. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
405 lines
20 KiB
PHP
405 lines
20 KiB
PHP
<?php
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namespace App\Content;
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use App\Domain\InvalidPage;
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use Doctrine\DBAL\Connection;
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/**
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* The site wide design system: a free colour palette, font families and the base typography every
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* page inherits. This is the "Haupt-Typografie" – set once here, valid everywhere, overridable on
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* any block. Stored in the website row that has carried a theme column since the first migration.
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*/
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final class Theme
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{
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public const MAX_COLORS = 40;
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public const MAX_FONTS = 8;
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public const MAX_PRESETS = 40;
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/** Weights Google serves for most families; also the range a designer realistically needs. */
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public const WEIGHTS = [100, 200, 300, 400, 500, 600, 700, 800, 900];
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public const FALLBACKS = [
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'sans-serif' => 'Serifenlos',
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'serif' => 'Serifen',
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'monospace' => 'Feste Breite',
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'system-ui' => 'Systemschrift',
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];
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/**
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* Fertige Paletten zum Übernehmen. Dieselben fünf Schlüssel wie die Voreinstellung, damit
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* Grundfarben und Blöcke, die auf die Schlüssel ink oder link zeigen, stimmen nach dem Wechsel weiter.
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* Die Linkfarbe erreicht auf dem Papierton jeweils mindestens 4,5:1 - eine Palette, die
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* ihre eigenen Links unlesbar macht, wäre keine Hilfe.
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*/
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public const PALETTES = [
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['name' => 'Wald', 'colors' => ['paper' => '#f6f7f4', 'ink' => '#203b34', 'mint' => '#e4efb9', 'accent' => '#b55b12', 'link' => '#a4510f']],
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['name' => 'Ozean', 'colors' => ['paper' => '#f5f8fa', 'ink' => '#12283a', 'mint' => '#d6ecf3', 'accent' => '#0e7490', 'link' => '#0b5f78']],
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['name' => 'Sand', 'colors' => ['paper' => '#faf6ef', 'ink' => '#3b2f24', 'mint' => '#f1e4cf', 'accent' => '#b8672a', 'link' => '#9a5320']],
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['name' => 'Koralle', 'colors' => ['paper' => '#fffaf8', 'ink' => '#2b2320', 'mint' => '#ffe4dc', 'accent' => '#d9483b', 'link' => '#b83a2f']],
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['name' => 'Schiefer', 'colors' => ['paper' => '#f4f5f7', 'ink' => '#1f2937', 'mint' => '#e2e8f0', 'accent' => '#4f46e5', 'link' => '#4338ca']],
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['name' => 'Olive', 'colors' => ['paper' => '#f7f7f2', 'ink' => '#2a2f23', 'mint' => '#e6ead3', 'accent' => '#6b7a2e', 'link' => '#55621f']],
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['name' => 'Nacht', 'colors' => ['paper' => '#14181d', 'ink' => '#eef1f4', 'mint' => '#262e38', 'accent' => '#7cc4ff', 'link' => '#9ad2ff']],
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];
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/** Die Namen der Palettenfarben, wie sie in einer neuen Palette heißen. */
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public const COLOR_NAMES = ['paper' => 'Papier', 'ink' => 'Tinte', 'mint' => 'Mint', 'accent' => 'Akzent', 'link' => 'Links'];
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public const DEFAULTS = [
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'colors' => [
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['key' => 'paper', 'name' => 'Papier', 'value' => '#f6f7f4'],
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['key' => 'ink', 'name' => 'Tinte', 'value' => '#203b34'],
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['key' => 'mint', 'name' => 'Mint', 'value' => '#e4efb9'],
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['key' => 'accent', 'name' => 'Akzent', 'value' => '#b55b12'],
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// Darker sibling of the accent: #b55b12 reaches only 4.37:1 on the light tones and
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// would fail AA for normal text. This one passes on paper, mint and white.
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['key' => 'link', 'name' => 'Links', 'value' => '#a4510f'],
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],
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'fonts' => [
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['key' => 'body', 'name' => 'Fließtext', 'family' => '', 'source' => 'system', 'weights' => [400, 600], 'fallback' => 'system-ui'],
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['key' => 'heading', 'name' => 'Überschriften', 'family' => '', 'source' => 'system', 'weights' => [500, 700], 'fallback' => 'system-ui'],
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],
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'base' => [
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'fontFamily' => 'body',
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'headingFontFamily' => 'heading',
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'fontSize' => '18px',
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'lineHeight' => 1.6,
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'color' => '@ink',
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'backgroundColor' => '@paper',
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'linkColor' => '@link',
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'containerWidth' => '1240px',
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'headingScale' => 1.25,
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// Die Ecken jedes Bildes auf der Website. Stand bis 1.20.2 fest im Stylesheet -
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// sichtbar gerundet, aber in keinem Feld zu finden. 12px bleibt die Vorgabe,
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// damit bestehende Websites gleich aussehen; 0px macht Bilder eckig.
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'imageRadius' => '12px',
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// Unterstrichene Links im Fließtext. An, weil ein Link, den nur die Farbe verrät,
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// für Menschen mit Farbsehschwäche kein Link ist. Wer eine ruhigere Seite will,
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// schaltet es hier ab - dann bleibt der Unterstrich beim Überfahren.
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'linkUnderline' => true,
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],
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];
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public function __construct(private Connection $db)
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{
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}
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/** Remembered for one request, like the settings; dropped on every write. */
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private ?array $loaded = null;
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private bool $buttonsConfigured = false;
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public function load(): array
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{
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if (null !== $this->loaded) {
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return $this->loaded;
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}
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$raw = $this->db->fetchOne('SELECT theme FROM website WHERE id = ?', ['default']);
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$stored = is_string($raw) ? json_decode($raw, true, 512, JSON_THROW_ON_ERROR) : [];
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$this->buttonsConfigured = is_array($stored['buttons'] ?? null);
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if (!is_array($stored) || !isset($stored['colors'], $stored['fonts'], $stored['base'])) {
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return $this->loaded = [...self::DEFAULTS, 'presets' => [], 'buttons' => ButtonDesign::defaults(self::DEFAULTS['base'])];
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}
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return $this->loaded = [
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'colors' => $stored['colors'],
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'fonts' => $stored['fonts'],
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'base' => [...self::DEFAULTS['base'], ...$stored['base']],
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'presets' => is_array($stored['presets'] ?? null) ? $stored['presets'] : [],
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'buttons' => [...ButtonDesign::defaults([...self::DEFAULTS['base'], ...$stored['base']]), ...($stored['buttons'] ?? [])],
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];
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}
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public function save(array $colors, array $fonts, array $base, ?array $buttons = null): void
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{
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$theme = [
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'colors' => $this->colors($colors),
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'fonts' => $this->fonts($fonts),
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'base' => $this->base($base),
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// Saving the palette must not drop the presets an editor has collected.
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'presets' => $this->load()['presets'],
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];
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if (null !== $buttons || $this->buttonsConfigured) {
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$theme['buttons'] = ButtonDesign::validate($buttons ?? $this->load()['buttons'], $theme['base'], $theme['colors'], $theme['fonts']);
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}
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$keys = array_column($theme['colors'], 'key');
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foreach (['color', 'backgroundColor', 'linkColor'] as $field) {
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$value = $theme['base'][$field];
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if (str_starts_with($value, '@') && !in_array(substr($value, 1), $keys, true)) {
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throw new InvalidPage(sprintf('Die Grundfarbe verweist auf „%s“, das es in der Palette nicht gibt.', substr($value, 1)));
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}
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}
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foreach (['fontFamily', 'headingFontFamily'] as $field) {
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if (!in_array($theme['base'][$field], array_column($theme['fonts'], 'key'), true)) {
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throw new InvalidPage('Die Grundschrift verweist auf eine Schrift, die es nicht gibt.');
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}
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}
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$this->db->executeStatement('UPDATE website SET theme = ? WHERE id = ?', [
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json_encode($theme, JSON_THROW_ON_ERROR | JSON_UNESCAPED_UNICODE),
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'default',
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]);
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// After the write, never before: saving reads the theme again, and an early reset
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// would only refill the memo with the state that is about to be replaced.
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$this->loaded = null;
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}
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private function colors(array $input): array
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{
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$colors = [];
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$seen = [];
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foreach ($input as $row) {
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$key = strtolower(trim((string) ($row['key'] ?? '')));
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$value = trim((string) ($row['value'] ?? ''));
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if ('' === $key) {
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continue;
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}
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if (1 !== preg_match('/^[a-z][a-z0-9-]{0,31}$/D', $key) || isset($seen[$key])) {
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throw new InvalidPage('Jede Farbe braucht einen eindeutigen Schlüssel aus Kleinbuchstaben, Ziffern und Bindestrich.');
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}
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if (1 !== preg_match('/^#[0-9a-fA-F]{6}([0-9a-fA-F]{2})?$/D', $value)) {
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throw new InvalidPage(sprintf('„%s“ ist kein Farbwert wie #1a2b3c.', $value));
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}
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$seen[$key] = true;
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$colors[] = ['key' => $key, 'name' => mb_substr(trim((string) ($row['name'] ?? $key)), 0, 60) ?: $key, 'value' => strtolower($value)];
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}
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if ([] === $colors) {
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throw new InvalidPage('Die Palette braucht mindestens eine Farbe.');
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}
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if (count($colors) > self::MAX_COLORS) {
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throw new InvalidPage(sprintf('Mehr als %d Farben sind nicht vorgesehen.', self::MAX_COLORS));
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}
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return $colors;
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}
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private function fonts(array $input): array
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{
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$fonts = [];
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$seen = [];
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foreach ($input as $row) {
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$key = strtolower(trim((string) ($row['key'] ?? '')));
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if ('' === $key) {
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continue;
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}
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if (1 !== preg_match('/^[a-z][a-z0-9-]{0,39}$/D', $key) || isset($seen[$key])) {
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throw new InvalidPage('Jede Schrift braucht einen eindeutigen Schlüssel aus Kleinbuchstaben, Ziffern und Bindestrich.');
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}
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$family = trim((string) ($row['family'] ?? ''));
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// Only a family name, never a font stack: the fallback is chosen separately, so no
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// quoting or comma can travel into the generated CSS.
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if ('' !== $family && 1 !== preg_match('/^[A-Za-z0-9][A-Za-z0-9 ]{0,48}$/D', $family)) {
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throw new InvalidPage(sprintf('„%s“ ist kein einfacher Schriftname.', $family));
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}
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$source = (string) ($row['source'] ?? 'system');
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if (!in_array($source, ['system', 'google'], true)) {
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throw new InvalidPage('Als Quelle sind Systemschrift und Google Fonts vorgesehen.');
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}
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if ('google' === $source && '' === $family) {
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throw new InvalidPage('Für eine Google-Schrift wird ein Name benötigt, zum Beispiel Inter.');
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}
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$fallback = (string) ($row['fallback'] ?? 'system-ui');
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if (!isset(self::FALLBACKS[$fallback])) {
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throw new InvalidPage('Unbekannte Ersatzschrift.');
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}
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$weights = array_values(array_intersect(self::WEIGHTS, array_map('intval', (array) ($row['weights'] ?? [400]))));
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$seen[$key] = true;
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$fonts[] = [
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'key' => $key,
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'name' => mb_substr(trim((string) ($row['name'] ?? $key)), 0, 60) ?: $key,
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'family' => $family,
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'source' => $source,
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'weights' => [] === $weights ? [400] : $weights,
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'fallback' => $fallback,
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];
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}
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if ([] === $fonts) {
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throw new InvalidPage('Es wird mindestens eine Schrift benötigt.');
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}
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if (count($fonts) > self::MAX_FONTS) {
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throw new InvalidPage(sprintf('Mehr als %d Schriften sind nicht vorgesehen.', self::MAX_FONTS));
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}
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return $fonts;
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}
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private function base(array $input): array
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{
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$base = [...self::DEFAULTS['base']];
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foreach (['fontFamily', 'headingFontFamily'] as $field) {
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$base[$field] = strtolower(trim((string) ($input[$field] ?? $base[$field])));
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}
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foreach (['color', 'backgroundColor', 'linkColor'] as $field) {
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$value = trim((string) ($input[$field] ?? $base[$field]));
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if (1 !== preg_match(StyleSchema::COLOR, $value)) {
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throw new InvalidPage(sprintf('„%s“ ist kein Farbwert.', $value));
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}
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$base[$field] = $value;
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}
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foreach (['fontSize', 'containerWidth', 'imageRadius'] as $field) {
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$value = trim((string) ($input[$field] ?? $base[$field]));
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if (1 !== preg_match(StyleSchema::LENGTH, $value)) {
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throw new InvalidPage(sprintf('„%s“ ist keine Größenangabe wie 18px oder 70rem.', $value));
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}
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$base[$field] = $value;
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}
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$base['linkUnderline'] = (bool) ($input['linkUnderline'] ?? false);
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foreach (['lineHeight' => [0.8, 3.0], 'headingScale' => [1.0, 2.0]] as $field => [$min, $max]) {
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$value = (float) ($input[$field] ?? $base[$field]);
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if ($value < $min || $value > $max) {
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throw new InvalidPage(sprintf('„%s“ liegt außerhalb des zulässigen Bereichs.', $field));
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}
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$base[$field] = $value;
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}
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return $base;
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}
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/**
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* Stores a reusable style under a name, or removes it when the style is null. The style is
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* validated with the same compiler the documents use, so a preset can never carry a value a
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* block would be refused for.
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*/
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public function savePreset(string $name, ?array $style, StyleCompiler $compiler): void
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{
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$name = trim($name);
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if ('' === $name || mb_strlen($name) > 60) {
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throw new InvalidPage('Eine Vorlage braucht einen Namen mit höchstens 60 Zeichen.');
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}
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$key = trim(preg_replace('/[^a-z0-9]+/', '-', mb_strtolower($name, 'UTF-8')) ?? '', '-');
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if ('' === $key) {
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throw new InvalidPage('Aus diesem Namen lässt sich kein Schlüssel bilden.');
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}
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if (null !== $style) {
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$compiler->validate($style);
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}
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$theme = $this->load();
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if (!$this->buttonsConfigured) {
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unset($theme['buttons']);
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}
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$presets = array_values(array_filter($theme['presets'], static fn (array $p): bool => $p['key'] !== $key));
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if (null !== $style) {
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if (count($presets) >= self::MAX_PRESETS) {
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throw new InvalidPage(sprintf('Mehr als %d Vorlagen sind nicht vorgesehen.', self::MAX_PRESETS));
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}
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$presets[] = ['key' => $key, 'name' => $name, 'style' => $style];
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}
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usort($presets, static fn (array $a, array $b): int => strcmp($a['name'], $b['name']));
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$this->db->executeStatement('UPDATE website SET theme = ? WHERE id = ?', [
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json_encode([...$theme, 'presets' => $presets], JSON_THROW_ON_ERROR | JSON_UNESCAPED_UNICODE),
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'default',
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]);
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// After the write, never before: saving reads the theme again, and an early reset
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// would only refill the memo with the state that is about to be replaced.
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$this->loaded = null;
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}
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/** The stylesheet every page carries: palette variables, font variables and base typography. */
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/**
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* Eine Farbe aus den Einstellungen als CSS-Wert: `@schlüssel` wird zur Palettenvariablen,
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* ein Hexwert bleibt, und leer heißt "nicht gesetzt" - dann gilt der Standard des Stylesheets.
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* Ein Schlüssel, den die Palette nicht kennt, wird ebenfalls zu null: lieber der Standard als
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* eine Variable, die auf nichts zeigt.
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*/
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public static function cssColor(string $value, array $theme): ?string
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{
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if ('' === $value) {
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return null;
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}
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if (!str_starts_with($value, '@')) {
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return $value;
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}
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foreach ($theme['colors'] as $color) {
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if ($color['key'] === substr($value, 1)) {
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return sprintf('var(--k-%s)', $color['key']);
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}
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}
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return null;
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}
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/** Die relative Leuchtdichte einer Hexfarbe nach WCAG; 0 fuer Schwarz, 1 fuer Weiss, 0.5 wenn unlesbar. */
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public static function luminance(string $hex): float
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{
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if (1 !== preg_match('/^#([0-9a-f]{6})/i', $hex, $m)) {
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return 0.5;
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}
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$kanal = static function (int $wert): float {
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$c = $wert / 255;
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return $c <= 0.03928 ? $c / 12.92 : (($c + 0.055) / 1.055) ** 2.4;
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};
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return 0.2126 * $kanal(hexdec(substr($m[1], 0, 2))) + 0.7152 * $kanal(hexdec(substr($m[1], 2, 2))) + 0.0722 * $kanal(hexdec(substr($m[1], 4, 2)));
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}
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public function css(array $theme): string
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{
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$variables = [];
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foreach ($theme['colors'] as $color) {
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$variables[] = sprintf('--k-%s:%s', $color['key'], $color['value']);
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}
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foreach ($theme['fonts'] as $font) {
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$stack = '' === $font['family'] ? $font['fallback'] : sprintf('"%s",%s', $font['family'], $font['fallback']);
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$variables[] = sprintf('--kf-%s:%s', $font['key'], $stack);
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}
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$base = $theme['base'];
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$variables[] = sprintf('--k-container:%s', $base['containerWidth']);
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$variables[] = sprintf('--k-image-radius:%s', $base['imageRadius']);
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$colour = static fn (string $v): string => str_starts_with($v, '@') ? sprintf('var(--k-%s)', substr($v, 1)) : $v;
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// Die Bausteine selbst - Knopf, Symbol, Rahmen, ruhiger Text - wurden aus festen Werten in
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// site.css gefaerbt. Eine Website mit eigener Palette behielt damit das Gruen der Vorlage:
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// die Farben liessen sich einstellen und taten nichts. Hier bekommen diese Token ihre
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// Werte aus dem Theme. Als Akzent dient die Linkfarbe und nicht ein Palettenname, weil
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// dieses Token auch kleine Beschriftungen faerbt - eine helle Akzentfarbe waere dort
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// nicht mehr lesbar.
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$ink = $colour($base['color']);
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$paper = $colour($base['backgroundColor']);
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$variables[] = sprintf('--ink:%s', $ink);
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$variables[] = sprintf('--paper:%s', $paper);
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$variables[] = sprintf('--accent:%s', $colour($base['linkColor']));
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// Abgeleitet statt erfunden: ruhiger Text und Linien sind der Textton, in den Hintergrund
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// gemischt. Ein Palettenwert gleichen Namens hat Vorrang, damit sich beides setzen laesst.
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// 80 Prozent, nicht weniger: bei 72 kam fuer eine Palette mit hellem Textton ein Grau
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// heraus, das die 4,5:1 knapp verfehlte - gefunden beim Nachbau von kant-it.de.
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$variables[] = sprintf('--muted:var(--k-muted,color-mix(in srgb,%s 80%%,%s))', $ink, $paper);
|
||
$variables[] = sprintf('--line:var(--k-line,color-mix(in srgb,%s 20%%,%s))', $ink, $paper);
|
||
$variables[] = sprintf('--mint:var(--k-mint,color-mix(in srgb,%s 14%%,%s))', $colour($base['linkColor']), $paper);
|
||
// Dunkle Palette: Formularfelder, Rollbalken und Fehlermeldungen folgen ihr. Das Rot fuer
|
||
// Fehler war fest auf Weiss gedacht; auf dunklem Grund ist es unlesbar. Also je nach
|
||
// Helligkeit des Papiers ein Rot, das dort steht - und der Hintergrund der Meldung aus
|
||
// Rot und Papier gemischt statt aus einem festen Hellrosa.
|
||
// Fuer die Leuchtdichte braucht es den Hexwert, nicht den Verweis var(--k-...).
|
||
$hexwert = static fn (string $wert): string => str_starts_with($wert, '@') ? (string) (array_column($theme['colors'], 'value', 'key')[substr($wert, 1)] ?? '#ffffff') : $wert;
|
||
$dunkel = self::luminance($hexwert($base['backgroundColor'])) < 0.4;
|
||
$variables[] = '--k-scheme:'.($dunkel ? 'dark' : 'light');
|
||
$variables[] = '--k-error:'.($dunkel ? '#ff9b8a' : '#8b2f22');
|
||
$variables[] = sprintf('--k-error-bg:color-mix(in srgb,%s 12%%,%s)', $dunkel ? '#ff9b8a' : '#8b2f22', $hexwert($base['backgroundColor']));
|
||
$variables[] = sprintf('--k-error-line:color-mix(in srgb,%s 45%%,%s)', $dunkel ? '#ff9b8a' : '#8b2f22', $hexwert($base['backgroundColor']));
|
||
|
||
$scale = (float) $base['headingScale'];
|
||
$headings = '';
|
||
// A modular scale from the base size, so one number changes the whole hierarchy.
|
||
foreach ([1 => 4, 2 => 3, 3 => 2, 4 => 1, 5 => 0, 6 => -1] as $level => $step) {
|
||
$headings .= sprintf('.kant h%d{font-size:calc(var(--k-size) * %.4f)}', $level, $scale ** $step);
|
||
}
|
||
|
||
return sprintf(
|
||
':root{%s;--k-size:%s}.kant{font-family:var(--kf-%s);font-size:var(--k-size);line-height:%s;color:%s;background:%s}'
|
||
.'.kant h1,.kant h2,.kant h3,.kant h4,.kant h5,.kant h6{font-family:var(--kf-%s)}'
|
||
.'.kant .block-text a,.kant .block-list a,.kant .post-excerpt a{color:%s;text-decoration:%s}'
|
||
.'.kant .block-text a:hover,.kant .block-list a:hover,.kant .post-excerpt a:hover{text-decoration:underline}'
|
||
.'.kant .shell{max-width:var(--k-container)}%s',
|
||
implode(';', $variables),
|
||
$base['fontSize'],
|
||
$base['fontFamily'],
|
||
$base['lineHeight'],
|
||
$colour($base['color']),
|
||
$colour($base['backgroundColor']),
|
||
$base['headingFontFamily'],
|
||
$colour($base['linkColor']),
|
||
($base['linkUnderline'] ?? true) ? 'underline' : 'none',
|
||
$headings,
|
||
).ButtonDesign::css($theme['buttons'] ?? ButtonDesign::defaults($base));
|
||
}
|
||
}
|