LibGUI: Add GTextDocument::text_in_range(GTextRange)

This function returns a String containing the text in a given range.
GTextEditor::selected_text() is now just a wrapper around this.

3 files changed, 21 insertions, 12 deletions

diff --git a/Libraries/LibGUI/GTextDocument.cpp b/Libraries/LibGUI/GTextDocument.cpp
index 12a71e2a8f..fcaeb33b8e 100644
--- a/Libraries/LibGUI/GTextDocument.cpp
+++ b/Libraries/LibGUI/GTextDocument.cpp
@@ -1,3 +1,4 @@
+#include <AK/StringBuilder.h>
 #include <LibGUI/GTextDocument.h>
 #include <ctype.h>
 
@@ -165,3 +166,20 @@ void GTextDocument::update_views(Badge<GTextDocumentLine>)
     for (auto* client : m_clients)
         client->document_did_change();
 }
+
+String GTextDocument::text_in_range(const GTextRange& a_range) const
+{
+    auto range = a_range.normalized();
+
+    StringBuilder builder;
+    for (int i = range.start().line(); i <= range.end().line(); ++i) {
+        auto& line = lines()[i];
+        int selection_start_column_on_line = range.start().line() == i ? range.start().column() : 0;
+        int selection_end_column_on_line = range.end().line() == i ? range.end().column() : line.length();
+        builder.append(line.characters() + selection_start_column_on_line, selection_end_column_on_line - selection_start_column_on_line);
+        if (i != range.end().line())
+            builder.append('\n');
+    }
+
+    return builder.to_string();
+}
diff --git a/Libraries/LibGUI/GTextDocument.h b/Libraries/LibGUI/GTextDocument.h
index 47ad556370..3578f3d551 100644
--- a/Libraries/LibGUI/GTextDocument.h
+++ b/Libraries/LibGUI/GTextDocument.h
@@ -59,6 +59,8 @@ public:
 
     void update_views(Badge<GTextDocumentLine>);
 
+    String text_in_range(const GTextRange&) const;
+
 private:
     explicit GTextDocument(Client* client);
 
diff --git a/Libraries/LibGUI/GTextEditor.cpp b/Libraries/LibGUI/GTextEditor.cpp
index 9b991eaff6..148c60f584 100644
--- a/Libraries/LibGUI/GTextEditor.cpp
+++ b/Libraries/LibGUI/GTextEditor.cpp
@@ -1002,18 +1002,7 @@ String GTextEditor::selected_text() const
     if (!has_selection())
         return {};
 
-    auto selection = normalized_selection();
-    StringBuilder builder;
-    for (int i = selection.start().line(); i <= selection.end().line(); ++i) {
-        auto& line = lines()[i];
-        int selection_start_column_on_line = selection.start().line() == i ? selection.start().column() : 0;
-        int selection_end_column_on_line = selection.end().line() == i ? selection.end().column() : line.length();
-        builder.append(line.characters() + selection_start_column_on_line, selection_end_column_on_line - selection_start_column_on_line);
-        if (i != selection.end().line())
-            builder.append('\n');
-    }
-
-    return builder.to_string();
+    return document().text_in_range(m_selection);
 }
 
 void GTextEditor::delete_selection()