From 7a999b13bdd967c07da29273e9c03af3e3ddc989 Mon Sep 17 00:00:00 2001
From: Lendemor <thomas.brandeho@gmail.com>
Date: Tue, 29 Aug 2017 21:13:13 +0200
Subject: [PATCH] improved autocompletion in shell

---
 src/sparrowshell/sparrowshell.cpp | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/src/sparrowshell/sparrowshell.cpp b/src/sparrowshell/sparrowshell.cpp
index 2c52ac4..1d51954 100644
--- a/src/sparrowshell/sparrowshell.cpp
+++ b/src/sparrowshell/sparrowshell.cpp
@@ -70,9 +70,23 @@ SparrowShell::AutocompletionCallBack::AutocompletionCallBack(SparrowShell* shell
 
 void SparrowShell::AutocompletionCallBack::exec(){
     std::string text = m_text_input_node->getText();
-    std::vector<std::string> result = m_shell->m_script->possibleCompletion(text);
+    std::vector<std::string> results = m_shell->m_script->possibleCompletion(text);
+
+    if (!results.empty()){
+        std:: string common_prefix = results[0];
+        for( auto result : results){
+            int i = 0;
+            auto s1 = common_prefix.c_str();
+            auto s2 = result.c_str();
+            std::string cp;
+            while( (s1[i] && s2[i]) && (s1[i] == s2[i]) )
+                cp.push_back(s1[i++]);
+            common_prefix = cp;
+        }
+        m_text_input_node->setText(common_prefix);
+    }
     std::string output = "";
-    for(std::string& fun : result)
+    for(std::string& fun : results)
         output+=fun+" ";
     m_shell->out(output,glm::vec3(1,1,0));
 }