X-Git-Url: https://fleuret.org/cgi-bin/gitweb/gitweb.cgi?a=blobdiff_plain;f=selector.cc;h=a6eec4717aebe07437ce6ffbeab5477ebeb99074;hb=46c2d7bcdb9e4ca9ca803f9255606c11f4441ea1;hp=1ac71b2fe2a771461128cb0571ca06b179c032f2;hpb=50766773ece1be211a42d2342203b14c051aaf0b;p=selector.git

diff --git a/selector.cc b/selector.cc
index 1ac71b2..a6eec47 100644
--- a/selector.cc
+++ b/selector.cc
@@ -28,14 +28,23 @@
 
 using namespace std;
 
+ostream *log;
+
 const int buffer_size = 1024;
 const int nb_lines_max = 100000;
 
-void refresh_screen(int *screen_line, int *line, int nb_lines, char **lines, char *regexp, int noblink) {
+int match(char *string, char *regexp) {
+  return strstr(string, regexp) != 0;
+}
+
+void update_screen(int *current_line, int motion,
+                   int nb_lines, char **lines,
+                   char *regexp, int noblink) {
+
   char buffer[buffer_size];
 
-  int maxx = getmaxx(stdscr);
-  int maxy = min(buffer_size-2, getmaxy(stdscr));
+  int console_width = getmaxx(stdscr);
+  int console_height = getmaxy(stdscr);
 
   if(!noblink) {
     clear();
@@ -46,48 +55,107 @@ void refresh_screen(int *screen_line, int *line, int nb_lines, char **lines, cha
   printw("\n");
 
   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;
+  int new_line;
+  if(motion >= 0) {
+    new_line = *current_line + motion;
+    while(new_line < nb_lines && !match(lines[new_line], regexp)) {
+      new_line++;
+    }
+    if(new_line == nb_lines) {
+      new_line = *current_line;
+      while(new_line >= 0 && ! match(lines[new_line], regexp)) {
+        new_line--;
+      }
+    }
+  } else {
+
+    new_line = *current_line - 1;
+    while(new_line >= 0 && ! match(lines[new_line], regexp)) {
+      new_line--;
+    }
 
-      while(lines[y][k] && k < buffer_size - 2 && k < maxx - 1) {
-        buffer[k] = lines[y][k];
-        k++;
+    if(new_line < 0) {
+      new_line = *current_line;
+      while(new_line < nb_lines && !match(lines[new_line], regexp)) {
+        new_line++;
+      }
+      if(new_line == nb_lines) {
+        new_line = -1;
       }
+    }
+  }
+
+  // Here new_line is either a line number matching the regexp, or -1
 
-      if(noblink) {
-        while(k < maxx - 1) {
-          buffer[k++] = ' ';
+  if(new_line >= 0) {
+    int first_line = new_line, last_line = new_line, nb_match = 1;
+
+    while(nb_match < console_height && (first_line > 0 || last_line < nb_lines - 1)) {
+
+      if(first_line > 0) {
+        first_line--;
+        while(first_line > 0 && !match(lines[first_line], regexp)) {
+          first_line--;
+        }
+        if(match(lines[first_line], regexp)) {
+          nb_match++;
         }
       }
-      buffer[k++] = '\n';
-      buffer[k++] = '\0';
-
-      if(nb_printed_lines == *line + 1) {
-        attron(COLOR_PAIR(2));
-        printw(buffer);
-        attroff(COLOR_PAIR(2));
-      } else {
-        printw(buffer);
+
+      if(last_line < nb_lines - 1) {
+        last_line++;
+        while(last_line < nb_lines - 1 && !match(lines[last_line], regexp)) {
+          last_line++;
+        }
+
+        if(match(lines[last_line], regexp)) {
+          nb_match++;
+        }
       }
+    }
+
+    for(int l = first_line; l <= last_line; l++) {
+      if(match(lines[l], regexp)) {
+        int k = 0;
 
-      last_printer_line = y;
-      nb_printed_lines++;
+        while(lines[l][k] && k < buffer_size - 2 && k < console_width - 1) {
+          buffer[k] = lines[l][k];
+          k++;
+        }
+
+        if(noblink) {
+          while(k < console_width - 1) {
+            buffer[k++] = ' ';
+          }
+        }
+        buffer[k++] = '\n';
+        buffer[k++] = '\0';
+
+        if(l == new_line) {
+          attron(COLOR_PAIR(2));
+          printw(buffer);
+          attroff(COLOR_PAIR(2));
+        } else {
+          printw(buffer);
+        }
+
+        last_printer_line = l;
+        nb_printed_lines++;
+      }
     }
-    y++;
+
+    *current_line = new_line;
   }
 
   if(noblink) { // Erase the rest of the window. That's slightly ugly.
     int k = 0;
-    while(k < maxx - 1) {
+    while(k < console_width - 1) {
       buffer[k++] = ' ';
     }
     buffer[k++] = '\n';
     buffer[k++] = '\0';
-    for(int l = nb_printed_lines; l < maxy; l++) {
+    for(int l = nb_printed_lines; l < console_height; l++) {
       printw(buffer);
     }
   }
@@ -97,8 +165,8 @@ void refresh_screen(int *screen_line, int *line, int nb_lines, char **lines, cha
   move(0, 0);
   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';
+  for(int k = strlen(buffer); k < console_width - 1; k++) buffer[k] = ' ';
+  buffer[console_width-1] = '\0';
   printw(buffer);
   attroff(COLOR_PAIR(1));
 
@@ -108,7 +176,9 @@ void refresh_screen(int *screen_line, int *line, int nb_lines, char **lines, cha
 int main(int argc, char **argv) {
   char buffer[buffer_size];
   char *lines[nb_lines_max];
-  int noblink = 1;
+  int noblink = 0;
+
+  log = new fstream("/tmp/selector.log");
 
   char *file_name;
   char stdin_name[] = "/dev/stdin";
@@ -155,14 +225,18 @@ int main(int argc, char **argv) {
 
   int key;
 
-  int line = 0, screen_line = 0;
+  int line = 0;
 
-  refresh_screen(&screen_line, &line, nb_lines, lines, regexp, noblink);
+  update_screen(&line, 0,
+                nb_lines, lines,
+                regexp, noblink);
 
   do {
 
     key = getch();
 
+    int motion = 0;
+
     if(key >= ' ' && key <= 'z') {
       regexp[regexp_point++] = key;
       regexp[regexp_point] = '\0';
@@ -176,25 +250,34 @@ int main(int argc, char **argv) {
     }
 
     else if(key == KEY_UP || key == '') {
-      if(line > 0) {
-        line--;
-      }
+      motion = -1;
     }
 
     else if(key == KEY_DOWN || key == '') {
-      line++;
+      motion = 1;
     }
 
-    refresh_screen(&screen_line, &line, nb_lines, lines, regexp, noblink);
+    update_screen(&line, motion, nb_lines, lines, regexp, noblink);
   } while(key != '\n' && key != KEY_ENTER && key != '');
 
   echo();
   curs_set(1);
   endwin();
 
+  // ofstream out("/tmp/selector.out");
+  // if(key == KEY_ENTER || key == '\n') {
+    // out << lines[highlighted_line] << endl;
+  // } else {
+    // out << endl;
+  // }
+  // out.flush();
+
   for(int l = 0; l < nb_lines; l++) {
     delete[] lines[l];
   }
 
+  log->flush();
+  delete log;
+
   return 0;
 }