From 23c4f100274d7d32ec0d6ba793d3d230f252cda0 Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Thu, 29 Oct 2020 23:52:07 +0100
Subject: [PATCH] LibGUI: Add TextDocument::span_at(TextPosition)

---
 Libraries/LibGUI/TextDocument.cpp | 9 +++++++++
 Libraries/LibGUI/TextDocument.h   | 2 ++
 2 files changed, 11 insertions(+)

diff --git a/Libraries/LibGUI/TextDocument.cpp b/Libraries/LibGUI/TextDocument.cpp
index 35abe1e3ace..137cbdab944 100644
--- a/Libraries/LibGUI/TextDocument.cpp
+++ b/Libraries/LibGUI/TextDocument.cpp
@@ -699,4 +699,13 @@ TextRange TextDocument::range_for_entire_line(size_t line_index) const
     return { { line_index, 0 }, { line_index, line(line_index).length() } };
 }
 
+const TextDocumentSpan* TextDocument::span_at(const TextPosition& position) const
+{
+    for (auto& span : m_spans) {
+        if (span.range.contains(position))
+            return &span;
+    }
+    return nullptr;
+}
+
 }
diff --git a/Libraries/LibGUI/TextDocument.h b/Libraries/LibGUI/TextDocument.h
index e6ee731ceb4..27b9f4b10f9 100644
--- a/Libraries/LibGUI/TextDocument.h
+++ b/Libraries/LibGUI/TextDocument.h
@@ -93,6 +93,8 @@ public:
     const Vector<TextDocumentSpan>& spans() const { return m_spans; }
     void set_span_at_index(size_t index, TextDocumentSpan span) { m_spans[index] = move(span); }
 
+    const TextDocumentSpan* span_at(const TextPosition&) const;
+
     void append_line(NonnullOwnPtr<TextDocumentLine>);
     void remove_line(size_t line_index);
     void remove_all_lines();