core: add bare display mode (for easy text selection and click on URLs)

New key: alt+"!", to swith to bare display (same key to come back to
standard display).

New options:
- weechat.look.bare_display_exit_on_input (default: on): by default
  any changes in input will return to standard display
- weechat.look.bare_display_time_format (default: "%H:%M"): the format
  of time used in bare display.

src/gui/curses/gui-curses-bar-window.c

@@ -411,6 +411,9 @@ gui_bar_window_draw (struct t_gui_bar_window *bar_window,
     if (!gui_init_ok)
         return;
 
+    if (gui_window_bare_display)
+        return;
+
     if ((bar_window->x < 0) || (bar_window->y < 0))
         return;
 

src/gui/curses/gui-curses-chat.c

@@ -24,6 +24,7 @@
 #endif
 
 #include <stdlib.h>
+#include <stdio.h>
 #include <string.h>
 #include <time.h>
 
@@ -1843,6 +1844,144 @@ gui_chat_draw_free_buffer (struct t_gui_window *window, int clear_chat)
     }
 }
 
+/*
+ * Gets line content in bare display.
+ */
+
+char *
+gui_chat_get_bare_line (struct t_gui_line *line)
+{
+    char *prefix, *message, str_time[256], *str_line;
+    const char *tag_prefix_nick;
+    struct tm *local_time;
+    int length;
+
+    prefix = NULL;
+    message = NULL;
+    str_line = NULL;
+
+    prefix = (line->data->prefix) ?
+        gui_color_decode (line->data->prefix, NULL) : strdup ("");
+    if (!prefix)
+        goto end;
+    message = (line->data->message) ?
+        gui_color_decode (line->data->message, NULL) : strdup ("");
+    if (!message)
+        goto end;
+
+    str_time[0] = '\0';
+    if ((line->data->date > 0)
+        && CONFIG_STRING(config_look_bare_display_time_format)
+        && CONFIG_STRING(config_look_bare_display_time_format)[0])
+    {
+        local_time = localtime (&line->data->date);
+        strftime (str_time, sizeof (str_time),
+                  CONFIG_STRING(config_look_bare_display_time_format),
+                  local_time);
+    }
+    tag_prefix_nick = gui_line_search_tag_starting_with (line, "prefix_nick_");
+
+    length = strlen (str_time) + 1 + 1 + strlen (prefix) + 1 + 1
+        + strlen (message) + 1;
+    str_line = malloc (length);
+    if (str_line)
+    {
+        snprintf (str_line, length,
+                  "%s%s%s%s%s%s%s",
+                  str_time,
+                  (str_time[0]) ? " " : "",
+                  (prefix[0] && tag_prefix_nick) ? "<" : "",
+                  prefix,
+                  (prefix[0] && tag_prefix_nick) ? ">" : "",
+                  (prefix[0]) ? " " : "",
+                  message);
+    }
+
+end:
+    if (prefix)
+        free (prefix);
+    if (message)
+        free (message);
+
+    return str_line;
+}
+
+/*
+ * Draws a buffer in bare display (not ncurses).
+ */
+
+void
+gui_chat_draw_bare (struct t_gui_window *window)
+{
+    struct t_gui_line *ptr_line;
+    char *line;
+    int y, length, num_lines;
+
+    /* in bare display, we display ONLY the current window/buffer */
+    if (window != gui_current_window)
+        return;
+
+    /* clear screen */
+    printf ("\033[2J");
+
+    /* display lines */
+    if ((window->buffer->type == GUI_BUFFER_TYPE_FREE)
+        || window->scroll->start_line)
+    {
+        /* display from top to bottom (starting with "start_line") */
+        y = 0;
+        ptr_line = (window->scroll->start_line) ?
+            window->scroll->start_line : gui_line_get_first_displayed (window->buffer);
+        while (ptr_line && (y < gui_term_lines))
+        {
+            line = gui_chat_get_bare_line (ptr_line);
+            if (!line)
+                break;
+            length = utf8_strlen_screen (line);
+            num_lines = length / gui_term_cols;
+            if (length % gui_term_cols != 0)
+                num_lines++;
+            if (y + num_lines <= gui_term_lines)
+                printf ("\033[%d;1H%s", y + 1, line);
+            free (line);
+            y += num_lines;
+            ptr_line = gui_line_get_next_displayed (ptr_line);
+        }
+    }
+    else
+    {
+        /* display from bottom to top (starting with last line of buffer) */
+        y = gui_term_lines;
+        ptr_line = gui_line_get_last_displayed (window->buffer);
+        while (ptr_line && (y >= 0))
+        {
+            line = gui_chat_get_bare_line (ptr_line);
+            if (!line)
+                break;
+            length = utf8_strlen_screen (line);
+            num_lines = length / gui_term_cols;
+            if (length % gui_term_cols != 0)
+                num_lines++;
+            y -= num_lines;
+            if (y >= 0)
+                printf ("\033[%d;1H%s", y + 1, line);
+            free (line);
+            ptr_line = gui_line_get_prev_displayed (ptr_line);
+        }
+    }
+
+    /*
+     * move cursor to top/left or bottom/right, according to type of buffer and
+     * whether we are scrolling or not
+     */
+    printf ("\033[%d;1H",
+            (window->buffer->type == GUI_BUFFER_TYPE_FREE) ?
+            ((window->scroll->start_line) ? gui_term_lines : 1) :
+            ((window->scroll->start_line) ? 1 : gui_term_lines));
+
+    fflush (stdout);
+}
+
 /*
  * Draws chat window for a buffer.
  */
@@ -1858,6 +1997,13 @@ gui_chat_draw (struct t_gui_buffer *buffer, int clear_chat)
     if (!gui_init_ok)
         return;
 
+    if (gui_window_bare_display)
+    {
+        if (gui_current_window && (gui_current_window->buffer == buffer))
+            gui_chat_draw_bare (gui_current_window);
+        goto end;
+    }
+
     for (ptr_win = gui_windows; ptr_win; ptr_win = ptr_win->next_window)
     {
         if ((ptr_win->buffer->number == buffer->number)
@@ -1914,5 +2060,6 @@ gui_chat_draw (struct t_gui_buffer *buffer, int clear_chat)
         }
     }
 
+end:
     buffer->chat_refresh_needed = 0;
 }

src/gui/curses/gui-curses-key.c

@@ -214,6 +214,7 @@ gui_key_default_bindings (int context)
         BIND(/* m-m         */ "meta-m",             "/mute mouse toggle");
         BIND(/* start paste */ "meta2-200~",         "/input paste_start");
         BIND(/* end paste   */ "meta2-201~",         "/input paste_stop");
+        BIND(/* bare display*/ "meta-!",             "/window bare");
 
         /* bind meta-j + {01..99} to switch to buffers # > 10 */
         for (i = 1; i < 100; i++)

src/gui/curses/gui-curses-main.c

@@ -59,10 +59,10 @@
 #include "gui-curses.h"
 
 
-int gui_reload_config = 0;
-int gui_signal_sigwinch_received = 0;
-int gui_term_cols = 0;
-int gui_term_lines = 0;
+int gui_reload_config = 0;             /* 1 if config must be reloaded      */
+int gui_signal_sigwinch_received = 0;  /* sigwinch signal (term resized)    */
+int gui_term_cols = 0;                 /* number of columns in terminal     */
+int gui_term_lines = 0;                /* number of lines in terminal       */
 
 
 /*
@@ -375,9 +375,7 @@ gui_main_refreshs ()
     for (ptr_bar = gui_bars; ptr_bar; ptr_bar = ptr_bar->next_bar)
     {
         if (ptr_bar->bar_refresh_needed)
-        {
             gui_bar_draw (ptr_bar);
-        }
     }
 
     /* refresh window if needed (if asked during refresh of bars) */
@@ -393,7 +391,7 @@ gui_main_refreshs ()
         if (ptr_win->refresh_needed)
         {
             gui_window_switch_to_buffer (ptr_win, ptr_win->buffer, 0);
-            gui_window_redraw_buffer (ptr_win->buffer);
+            gui_chat_draw (ptr_win->buffer, 1);
             ptr_win->refresh_needed = 0;
         }
     }
@@ -409,18 +407,21 @@ gui_main_refreshs ()
         }
     }
 
-    /* refresh bars if needed */
-    for (ptr_bar = gui_bars; ptr_bar; ptr_bar = ptr_bar->next_bar)
+    if (!gui_window_bare_display)
     {
-        if (ptr_bar->bar_refresh_needed)
+        /* refresh bars if needed */
+        for (ptr_bar = gui_bars; ptr_bar; ptr_bar = ptr_bar->next_bar)
         {
-            gui_bar_draw (ptr_bar);
+            if (ptr_bar->bar_refresh_needed)
+            {
+                gui_bar_draw (ptr_bar);
+            }
         }
-    }
 
-    /* move cursor (for cursor mode) */
-    if (gui_cursor_mode)
-        gui_window_move_cursor ();
+        /* move cursor (for cursor mode) */
+        if (gui_cursor_mode)
+            gui_window_move_cursor ();
+    }
 }
 
 /*
@@ -476,7 +477,7 @@ gui_main_loop ()
         }
 
         gui_main_refreshs ();
-        if (gui_window_refresh_needed)
+        if (gui_window_refresh_needed && !gui_window_bare_display)
             gui_main_refreshs ();
 
         if (gui_signal_sigwinch_received)

src/gui/curses/gui-curses-window.c

@@ -53,6 +53,7 @@
 #include "../gui-layout.h"
 #include "../gui-line.h"
 #include "../gui-main.h"
+#include "../gui-mouse.h"
 #include "../gui-nicklist.h"
 #include "gui-curses.h"
 
@@ -1161,38 +1162,6 @@ gui_window_draw_separators (struct t_gui_window *window)
     }
 }
 
-/*
- * Redraws a buffer.
- */
-
-void
-gui_window_redraw_buffer (struct t_gui_buffer *buffer)
-{
-    if (!gui_init_ok)
-        return;
-
-    gui_chat_draw (buffer, 1);
-}
-
-/*
- * Redraws all buffers.
- */
-
-void
-gui_window_redraw_all_buffers ()
-{
-    struct t_gui_buffer *ptr_buffer;
-
-    if (!gui_init_ok)
-        return;
-
-    for (ptr_buffer = gui_buffers; ptr_buffer;
-         ptr_buffer = ptr_buffer->next_buffer)
-    {
-        gui_window_redraw_buffer (ptr_buffer);
-    }
-}
-
 /*
  * Switches to another buffer in a window.
  */
@@ -2379,6 +2348,77 @@ gui_window_refresh_screen (int full_refresh)
     gui_window_refresh_windows ();
 }
 
+/*
+ * Callback for bare display timer.
+ */
+
+int
+gui_window_bare_display_timer_cb (void *data, int remaining_calls)
+{
+    /* make C compiler happy */
+    (void) data;
+
+    if (gui_window_bare_display)
+        gui_window_bare_display_toggle (NULL);
+
+    if (remaining_calls == 0)
+        gui_window_bare_display_timer = NULL;
+
+    return WEECHAT_RC_OK;
+}
+
+/*
+ * Toggles bare display.
+ */
+
+void
+gui_window_bare_display_toggle (const char *delay)
+{
+    long milliseconds;
+    char *error;
+
+    gui_window_bare_display ^= 1;
+
+    if (gui_window_bare_display)
+    {
+        /* temporarily disable ncurses */
+        endwin ();
+        if (gui_mouse_enabled)
+            gui_mouse_disable ();
+        if (delay)
+        {
+            error = NULL;
+            milliseconds = strtol (delay, &error, 10);
+            if (error && !error[0] && (milliseconds >= 0))
+            {
+                if (gui_window_bare_display_timer)
+                {
+                    unhook (gui_window_bare_display_timer);
+                    gui_window_bare_display_timer = NULL;
+                }
+                gui_window_bare_display_timer = hook_timer (
+                    NULL,
+                    milliseconds, 0, 1,
+                    &gui_window_bare_display_timer_cb, NULL);
+            }
+        }
+    }
+    else
+    {
+        /* come back to standard display (with ncurses) */
+        refresh ();
+        if (gui_window_bare_display_timer)
+        {
+            unhook (gui_window_bare_display_timer);
+            gui_window_bare_display_timer = NULL;
+        }
+        if (CONFIG_BOOLEAN(config_look_mouse))
+            gui_mouse_enable ();
+    }
+
+    gui_window_ask_refresh (2);
+}
+
 /*
  * Sets terminal title.
  *

src/gui/curses/gui-curses.h

@@ -99,7 +99,6 @@ extern int gui_key_read_cb (void *data, int fd);
 
 /* window functions */
 extern void gui_window_read_terminal_size ();
-extern void gui_window_redraw_buffer (struct t_gui_buffer *buffer);
 extern void gui_window_clear (WINDOW *window, int fg, int bg);
 extern void gui_window_clrtoeol (WINDOW *window);
 extern void gui_window_save_style (WINDOW *window);