add support for dedicated completion data

This allows to complete random things, useful along the -print flag but
also to limit the commands to those found my menumaker etc.

doc/asciidoc/fbrun.txt

@@ -69,6 +69,10 @@ OPTIONS
 *-hf* 'filename'::
 	History file to load. The default is *~/.fluxbox/fbrun_history*.
 
+*-cf* 'filename'::
+    Completion data to load. The default is empty. If no data can be loaded,
+    completion defaults to executables in $PATH
+
 *-preselect*::
     Select the preset text given by the *-text* parameter
 

util/fbrun/FbRun.cc

@@ -214,6 +214,23 @@ bool FbRun::loadHistory(const char *filename) {
     return true;
 }
 
+bool FbRun::loadCompletion(const char *filename) {
+    if (!filename)
+        return false;
+    ifstream infile(filename);
+    if (!infile)
+        return false;
+
+    m_apps.clear();
+    string line;
+    while (getline(infile, line)) {
+        if (!line.empty()) // don't add empty lines
+            m_apps.push_back(line);
+    }
+    return true;
+}
+
+
 bool FbRun::loadFont(const string &fontname) {
     if (!m_font.load(fontname.c_str()))
         return false;
@@ -472,7 +489,7 @@ void FbRun::tabCompleteApps() {
         tabComplete(m_files, m_current_files_item);
     } else {
         static bool first_run = true;
-        if (first_run) {
+        if (first_run && m_apps.empty()) {
             first_run = false;
             std::string path = getenv("PATH");
             FbTk::Directory dir;

util/fbrun/FbRun.hh

@@ -58,6 +58,7 @@ public:
        @return true on success, else false
     */
     bool loadHistory(const char *filename);
+    bool loadCompletion(const char *filename);
     /**
        @name events
     */

util/fbrun/main.cc

@@ -66,6 +66,7 @@ void showUsage(const char *progname) {
         "   -bg [color name]            Background color"<<endl<<
         "   -na                         Disable antialias"<<endl<<
         "   -hf [history file]          History file to load (default ~/.fluxbox/fbrun_history)"<<endl<<
+        "   -cf [completion file]       Complete contents of this file instead of $PATH binaries"<<endl<<
         "   -autocomplete               Complete on typing"<<endl<<
         "   -preselect                  Select preset text"<<endl<<
         "   -help                       Show this help"<<endl<<endl<<
@@ -89,6 +90,7 @@ int main(int argc, char **argv) {
     string background("white");   // text background color
     string display_name; // name of the display connection
     string history_file("~/.fluxbox/fbrun_history"); // command history file
+    string completion_file; // command history file
     // parse arguments
     for (int i=1; i<argc; i++) {
         string arg = argv[i];
@@ -124,6 +126,8 @@ int main(int argc, char **argv) {
             background = argv[++i];
         } else if (strcmp(argv[i], "-hf") == 0 && i+1 < argc) {
             history_file = argv[++i];
+        } else if (strcmp(argv[i], "-cf") == 0 && i+1 < argc) {
+            completion_file = argv[++i];
         } else if (strcmp(argv[i], "-preselect") == 0) {
             preselect = true;
         } else if (strcmp(argv[i], "-autocomplete") == 0) {
@@ -171,6 +175,12 @@ int main(int argc, char **argv) {
         if (!fbrun.loadHistory(expanded_filename.c_str()))
             cerr<<"FbRun Warning: Failed to load history file: "<<expanded_filename<<endl;
 
+        if (!completion_file.empty()) {
+            expanded_filename = FbTk::StringUtil::expandFilename(completion_file);
+            if (!fbrun.loadCompletion(expanded_filename.c_str()))
+                cerr<<"FbRun Warning: Failed to load completion file: "<<expanded_filename<<endl;
+        }
+
         fbrun.setTitle(title);
         fbrun.setText(text);
         if (preselect)