1 files changed, 156 insertions, 0 deletions
diff --git a/vendor/scssphp/source-span/src/ConcreteFileSpan.php b/vendor/scssphp/source-span/src/ConcreteFileSpan.php
new file mode 100644
index 000000000..43a0bc149
--- /dev/null
+++ b/vendor/scssphp/source-span/src/ConcreteFileSpan.php
@@ -0,0 +1,156 @@
+<?php
+
+namespace SourceSpan;
+
+use League\Uri\Contracts\UriInterface;
+
+/**
+ * The implementation of {@see FileSpan} based on a {@see SourceFile}.
+ *
+ * @see SourceFile::span()
+ *
+ * @internal
+ */
+final class ConcreteFileSpan extends SourceSpanMixin implements FileSpan
+{
+    /**
+     * @param int $start The offset of the beginning of the span.
+     * @param int $end   The offset of the end of the span.
+     */
+    public function __construct(
+        private readonly SourceFile $file,
+        private readonly int $start,
+        private readonly int $end,
+    ) {
+        if ($this->end < $this->start) {
+            throw new \InvalidArgumentException("End $this->end must come after start $this->start.");
+        }
+
+        if ($this->end > $this->file->getLength()) {
+            throw new \OutOfRangeException("End $this->end not be greater than the number of characters in the file, {$this->file->getLength()}.");
+        }
+
+        if ($this->start < 0) {
+            throw new \OutOfRangeException("Start may not be negative, was $this->start.");
+        }
+    }
+
+    public function getFile(): SourceFile
+    {
+        return $this->file;
+    }
+
+    public function getSourceUrl(): ?UriInterface
+    {
+        return $this->file->getSourceUrl();
+    }
+
+    public function getLength(): int
+    {
+        return $this->end - $this->start;
+    }
+
+    public function getStart(): FileLocation
+    {
+        return new FileLocation($this->file, $this->start);
+    }
+
+    public function getEnd(): FileLocation
+    {
+        return new FileLocation($this->file, $this->end);
+    }
+
+    public function getText(): string
+    {
+        return $this->file->getText($this->start, $this->end);
+    }
+
+    public function getContext(): string
+    {
+        $endLine = $this->file->getLine($this->end);
+        $endColumn = $this->file->getColumn($this->end);
+
+        if ($endColumn === 0 && $endLine !== 0) {
+            // If $this->end is at the very beginning of the line, the span covers the
+            // previous newline, so we only want to include the previous line in the
+            // context...
+
+            if ($this->getLength() === 0) {
+                // ...unless this is a point span, in which case we want to include the
+                // next line (or the empty string if this is the end of the file).
+                return $endLine === $this->file->getLines() - 1 ? '' : $this->file->getText($this->file->getOffset($endLine), $this->file->getOffset($endLine + 1));
+            }
+
+            $endOffset = $this->end;
+        } elseif ($endLine === $this->file->getLines() - 1) {
+            // If the span covers the last line of the file, the context should go all
+            // the way to the end of the file.
+            $endOffset = $this->file->getLength();
+        } else {
+            // Otherwise, the context should cover the full line on which [end]
+            // appears.
+            $endOffset = $this->file->getOffset($endLine + 1);
+        }
+
+        return $this->file->getText($this->file->getOffset($this->file->getLine($this->start)), $endOffset);
+    }
+
+    public function compareTo(SourceSpan $other): int
+    {
+        if (!$other instanceof ConcreteFileSpan) {
+            return parent::compareTo($other);
+        }
+
+        $result = $this->start <=> $other->start;
+
+        if ($result !== 0) {
+            return $result;
+        }
+
+        return $this->end <=> $other->end;
+    }
+
+    public function union(SourceSpan $other): SourceSpan
+    {
+        if (!$other instanceof FileSpan) {
+            return parent::union($other);
+        }
+
+        $span = $this->expand($other);
+
+        if ($other instanceof ConcreteFileSpan) {
+            if ($this->start > $other->end || $other->start > $this->end) {
+                throw new \InvalidArgumentException("Spans are disjoint.");
+            }
+        } else {
+            if ($this->start > $other->getEnd()->getOffset() || $other->getStart()->getOffset() > $this->end) {
+                throw new \InvalidArgumentException("Spans are disjoint.");
+            }
+        }
+
+        return $span;
+    }
+
+    public function expand(FileSpan $other): FileSpan
+    {
+        if ($this->file->getSourceUrl() !== $other->getFile()->getSourceUrl()) {
+            throw new \InvalidArgumentException('Source map URLs don\'t match.');
+        }
+
+        $start = min($this->start, $other->getStart()->getOffset());
+        $end = max($this->end, $other->getEnd()->getOffset());
+
+        return new ConcreteFileSpan($this->file, $start, $end);
+    }
+
+    public function subspan(int $start, ?int $end = null): FileSpan
+    {
+        Util::checkValidRange($start, $end, $this->getLength());
+
+        if ($start === 0 && ($end === null || $end === $this->getLength())) {
+            return $this;
+        }
+
+        return $this->file->span($this->start + $start, $end === null ? $this->end : $this->start + $end);
+    }
+}