151 lines
2.6 KiB
PHP
151 lines
2.6 KiB
PHP
<?php declare(strict_types=1);
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namespace Kilo;
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/**
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* @property-read int size
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* @property-read int rsize
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*/
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class Row {
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use MagicProperties;
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public string $chars = '';
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public string $render = '';
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// This feels dirty...
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private Editor $parent;
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public array $hl = [];
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public static function new(Editor $parent, string $chars): self
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{
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$self = new self();
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$self->chars = $chars;
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$self->parent = $parent;
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return $self;
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}
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private function __construct() {}
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public function __get(string $name)
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{
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switch ($name)
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{
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case 'size':
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return strlen($this->chars);
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case 'rsize':
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return strlen($this->render);
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default:
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return NULL;
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}
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}
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public function __toString(): string
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{
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return $this->chars . "\n";
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}
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public function insertChar(int $at, string $c): void
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{
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if ($at < 0 || $at > $this->size)
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{
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$at = $this->size;
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}
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// Safely insert into arbitrary position in the existing string
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$this->chars = substr($this->chars, 0, $at) . $c . substr($this->chars, $at);
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$this->update();
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$this->parent->dirty++;
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}
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public function appendString(string $s): void
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{
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$this->chars .= $s;
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$this->update();
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$this->parent->dirty++;
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}
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public function deleteChar(int $at): void
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{
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if ($at < 0 || $at >= $this->size)
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{
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return;
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}
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$this->chars = substr_replace($this->chars, '', $at, 1);
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$this->update();
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$this->parent->dirty++;
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}
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public function update(): void
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{
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$idx = 0;
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for ($i = 0; $i < $this->size; $i++)
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{
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if ($this->chars[$i] === "\t")
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{
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$this->render[$idx++] = ' ';
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while ($idx % KILO_TAB_STOP !== 0)
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{
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$this->render[$idx++] = ' ';
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}
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}
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else
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{
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$this->render[$idx++] = $this->chars[$i];
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}
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}
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$this->updateSyntax();
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}
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// ------------------------------------------------------------------------
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// ! Syntax Highlighting
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// ------------------------------------------------------------------------
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protected function updateSyntax(): void
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{
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$this->hl = array_fill(0, $this->rsize, Highlight::NORMAL);
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$prevSep = TRUE;
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$i = 0;
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while ($i < $this->rsize)
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{
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$char = $this->render[$i];
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$prevHl = ($i > 0) ? $this->hl[$i - 1] : Highlight::NORMAL;
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if ($this->parent->syntax === NULL)
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{
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return;
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}
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if ($this->parent->syntax->flags & Syntax::HIGHLIGHT_NUMBERS)
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{
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// Numbers, including decimal points
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if (
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($char === '.' && $prevHl === Highlight::NUMBER) ||
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(($prevSep || $prevHl === Highlight::NUMBER) && is_digit($char))
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)
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{
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$this->hl[$i] = Highlight::NUMBER;
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$i++;
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$prevSep = FALSE;
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continue;
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}
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}
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$prevSep = is_separator($char);
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$i++;
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}
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}
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}
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