X-Git-Url: https://fleuret.org/cgi-bin/gitweb/gitweb.cgi?a=blobdiff_plain;f=selector.cc;h=7d59b2fe1708d4f3c801e4719d85bab13f5a9e0c;hb=46c00136c5a8684c50f0a518f53fa8af85d18d92;hp=34ed86bbecc9ea42b511a22908758926ffbef8f9;hpb=35f5674e21b17ae2eaf8f0f8036d27477ef75dc1;p=selector.git

diff --git a/selector.cc b/selector.cc
index 34ed86b..7d59b2f 100644
--- a/selector.cc
+++ b/selector.cc
@@ -31,56 +31,98 @@ using namespace std;
 const int buffer_size = 1024;
 const int nb_lines_max = 100000;
 
-void build_display(int key, int nb_lines, char **lines, char *regexp) {
+void refresh_screen(int *screen_line, int *line, int nb_lines, char **lines, char *regexp, int noblink) {
   char buffer[buffer_size];
-  clear();         // Cleaning the window
-  refresh();       // After doing something on the display, we refresh it
+
   int maxx = getmaxx(stdscr);
-  int maxy = getmaxy(stdscr);
+  int maxy = min(buffer_size-2, getmaxy(stdscr));
+
+  if(!noblink) {
+    clear();
+  }
+
   use_default_colors();
-  // printw("maxx %d maxy %d key %d\n", maxx, maxy, key);
-  printw("\n");
+
   printw("\n");
-  int nb_printed_lines = 2;
-  for(int y = 0; nb_printed_lines < maxy && y < nb_lines; y++) {
-    if(strstr(lines[y], regexp)) {
+
+  int nb_printed_lines = 1, last_printer_line = -1;
+  int y = 0;
+
+  while(nb_printed_lines < maxy && y < nb_lines) {
+    if(strstr(lines[y], regexp) &&
+       (last_printer_line < 0 || strcmp(lines[y], lines[last_printer_line]))) {
       int k = 0;
-      while(lines[y][k] && k < buffer_size - 2 && k < maxx) {
+
+      while(lines[y][k] && k < buffer_size - 2 && k < maxx - 1) {
         buffer[k] = lines[y][k];
         k++;
       }
+
+      if(noblink) {
+        while(k < maxx - 1) {
+          buffer[k++] = ' ';
+        }
+      }
       buffer[k++] = '\n';
       buffer[k++] = '\0';
-      printw(buffer);
+
+      if(nb_printed_lines == *line + 1) {
+        attron(COLOR_PAIR(2));
+        printw(buffer);
+        attroff(COLOR_PAIR(2));
+      } else {
+        printw(buffer);
+      }
+
+      last_printer_line = y;
       nb_printed_lines++;
     }
+    y++;
   }
+
+  if(noblink) { // Erase the rest of the window. That's slightly ugly.
+    int k = 0;
+    while(k < maxx - 1) {
+      buffer[k++] = ' ';
+    }
+    buffer[k++] = '\n';
+    buffer[k++] = '\0';
+    for(int l = nb_printed_lines; l < maxy; l++) {
+      printw(buffer);
+    }
+  }
+
+  // Draw the modeline
+
   move(0, 0);
-  attron(COLOR_PAIR(1));        // Let's print something in red on black
-  printw("%d/%d pattern: %s\n", nb_printed_lines, nb_lines - 2, regexp);
-  attroff(COLOR_PAIR(1));       // Let's get back to default colors!
-}
+  attron(COLOR_PAIR(1));
+  sprintf(buffer, "%d/%d pattern: %s", nb_printed_lines - 1, nb_lines, regexp);
+  for(int k = strlen(buffer); k < maxx - 1; k++) buffer[k] = ' ';
+  buffer[maxx-1] = '\0';
+  printw(buffer);
+  attroff(COLOR_PAIR(1));
 
-// I should find were this is defined ...
+  refresh();       // After doing something on the display, we refresh it
+}
 
 int main(int argc, char **argv) {
-  int dummy, xpos, ypos;
-
   char buffer[buffer_size];
   char *lines[nb_lines_max];
+  int noblink = 1;
 
-  ifstream file(argv[1]);
+  char *file_name;
+  char stdin_name[] = "/dev/stdin";
 
-  if(argc != 2) {
-    cerr << argv[0] << " <file>" << endl;
-    return 1;
+  if(argc == 2 && strcmp(argv[1], "-")) {
+    file_name = argv[1];
+  } else {
+    file_name = stdin_name;
   }
 
+  ifstream file(file_name);
+
   if(file.fail()) {
-    cerr << "Can not open \""
-         << argv[1]
-         << "\""
-         << endl;
+    cerr << "Can not open \"" << file_name << "\"" << endl;
     return 1;
   }
 
@@ -96,44 +138,59 @@ int main(int argc, char **argv) {
   int regexp_point;
   regexp_point = 0;
 
-  initscr();        // Necessary to start a curses session
+  initscr();
 
-  if (has_colors()) {
-    cout << "You can use color on this terminal" << endl;
-  } else {
-    cout << "No colors." << endl;
+  if(!has_colors()) {
+    cerr << "No colors." << endl;
     return 1;
   }
 
-  noecho();        // I don't want echo when I press a key
-  curs_set(0);     // I don't want to see the cursor
+  noecho();
+  curs_set(0);
   keypad(stdscr, TRUE);
 
-  start_color();   // We will use colors
-  init_pair(1, COLOR_WHITE, COLOR_BLACK); // red on black for error messages
+  start_color();
+  init_pair(1, COLOR_WHITE, COLOR_BLACK);
+  init_pair(2, COLOR_BLACK, COLOR_YELLOW);
 
-  printw("Press a key to contine\n");
   int key;
 
-  build_display(-1, nb_lines, lines, regexp);
+  int line = 0, screen_line = 0;
+
+  refresh_screen(&screen_line, &line, nb_lines, lines, regexp, noblink);
 
   do {
+
     key = getch();
+
     if(key >= ' ' && key <= 'z') {
       regexp[regexp_point++] = key;
       regexp[regexp_point] = '\0';
-    } else if(key == KEY_BACKSPACE || key == KEY_DC) {
+    }
+
+    else if(key == KEY_BACKSPACE || key == KEY_DC) {
       if(regexp_point > 0) {
         regexp_point--;
         regexp[regexp_point] = '\0';
       }
     }
-    build_display(key, nb_lines, lines, regexp);
-  } while(key != '\n' && key != KEY_ENTER);
 
-  echo();         // We want to have echo
-  curs_set(1);    // We want to see the cursor again
-  endwin();       // Back to normal
+    else if(key == KEY_UP || key == '') {
+      if(line > 0) {
+        line--;
+      }
+    }
+
+    else if(key == KEY_DOWN || key == '') {
+      line++;
+    }
+
+    refresh_screen(&screen_line, &line, nb_lines, lines, regexp, noblink);
+  } while(key != '\n' && key != KEY_ENTER && key != '');
+
+  echo();
+  curs_set(1);
+  endwin();
 
   for(int l = 0; l < nb_lines; l++) {
     delete[] lines[l];
@@ -141,3 +198,4 @@ int main(int argc, char **argv) {
 
   return 0;
 }
+