Do not use deprecated function gtk_button_new_from_stock
[darcs-mirror-screen-message.debian.git] / sm.c
diff --git a/sm.c b/sm.c
index b1c07c8..c494796 100644 (file)
--- a/sm.c
+++ b/sm.c
@@ -1,6 +1,6 @@
 /*
-#     vlshow.c
-#     Copyright (C) 2006 Joachim Breitner
+#     sm.c
+#     Copyright (C) 2006 - 2014 Joachim Breitner
 #
 #     This program is free software; you can redistribute it and/or modify
 #     it under the terms of the GNU General Public License as published by
 #include <pango/pango.h>
 #include <string.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
 
-static int min(int x, int y) {
-       return x < y ? x : y;
-}
+#include "config.h"
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE                             /* for getopt_long */
+#endif
+#include <getopt.h>
+
+#define min(x,y) ((x) < (y) ? (x) : (y))
 
+#define AUTOHIDE_TIMEOUT 3
 
 static gboolean quality = TRUE;
-static gboolean need_resize = TRUE;
-static gboolean need_quick = TRUE;
+
+static int timeout_id=0;
 
 static GtkWidget* window;
 static GtkWidget* draw;
 static GdkCursor *cursor;
 static GtkWidget* quit;
 static GtkWidget* tv;
+static GtkWidget* entry_widget;
 static GtkSettings* settings;
 static GtkTextBuffer* tb;
 static PangoFontDescription *font;
-static PangoLayout* layout;
+static char *foreground = NULL;
+static char *background = NULL;
+static char *fontdesc = NULL;
+static int rotation = 0; // 0 = normal, 1 = left, 2 = inverted, 3 = right
+static int alignment = 0; // 0 = centered, 1 = left-aligned, 2 = right-aligned
+static GString *partial_input;
+static gulong quality_high_handler = 0;
+static gulong text_change_handler;
+
+gboolean hide_entry(gpointer *user_data) {
+       timeout_id = 0;
+       gtk_widget_hide(entry_widget);
+       gtk_widget_grab_focus(draw);
+       gtk_widget_queue_draw(draw);
+       gdk_window_set_cursor(gtk_widget_get_window(GTK_WIDGET(draw)), cursor);
+       return FALSE;
+}
+
+static void show_entry() {
+       if (timeout_id) {
+               g_source_remove(timeout_id);
+               timeout_id = 0;
+       }
+       gtk_widget_show(entry_widget);
+       gtk_widget_grab_focus(tv);
+       gdk_window_set_cursor(gtk_widget_get_window(GTK_WIDGET(draw)), NULL);
 
-static void realize(GtkWindow *window, GdkScreen *screen, gpointer data) {
-       gdk_window_set_cursor(draw->window, cursor);
+       timeout_id = g_timeout_add_seconds (AUTOHIDE_TIMEOUT, (GSourceFunc)hide_entry, NULL);
 }
 
 static void clear_text(GtkAccelGroup *accel, GObject *window, guint keyval,  GdkModifierType modifier) {
-       gtk_text_buffer_set_text(tb,"",-1);
+       if( gtk_text_buffer_get_char_count(tb) ) {
+               gtk_text_buffer_set_text(tb,"",-1);
+               show_entry();
+       } else {
+               gtk_main_quit();
+       }
 }
 
 static char *get_text() {
@@ -57,13 +95,13 @@ static char *get_text() {
        return gtk_text_buffer_get_text(tb, &start, &end, FALSE);
 }
 
-
 static void hq(gboolean q, gboolean force){
-       if (q != quality) 
+       if (q != quality) {
                if (q)
                        gtk_settings_set_long_property(settings,"gtk-xft-antialias",1,"Hier halt");
                else
                        gtk_settings_set_long_property(settings,"gtk-xft-antialias",0,"Hier halt");
+       }
        else
                if (force)
                        gtk_widget_queue_draw(draw);
@@ -71,22 +109,95 @@ static void hq(gboolean q, gboolean force){
        quality = q;
 }
 
-static void redraw() {
-       const char *text = pango_layout_get_text(layout);
+static gboolean quality_high (gpointer data) {
+       quality_high_handler = 0;
+       hq(TRUE, FALSE);
+       return FALSE;
+}
+
+static void redraw(GtkWidget *draw, cairo_t *cr, gpointer data) {
+       int q;
+       const char *text = get_text();
+
        if (strlen(text) > 0) {
-               GdkGC *gc = gtk_widget_get_style(draw)->fg_gc[GTK_STATE_NORMAL];
                int w1, h1;
+               static PangoLayout* layout;
+
+               layout = gtk_widget_create_pango_layout(draw, get_text());
+               pango_layout_set_font_description(layout, font);
+
+               switch(alignment){
+                       case 0: // center
+                               pango_layout_set_alignment(layout,PANGO_ALIGN_CENTER);
+                               break;
+                       case 1: // left
+                               pango_layout_set_alignment(layout,PANGO_ALIGN_LEFT);
+                               break;
+                       case 2: // left
+                               pango_layout_set_alignment(layout,PANGO_ALIGN_RIGHT);
+                               break;
+                       default:
+                               // we propably don't want to annoy the user, so default to
+                               // the old default-behaviour:
+                               pango_layout_set_alignment(layout,PANGO_ALIGN_CENTER);
+               }
+
                pango_layout_get_pixel_size(layout, &w1, &h1);
                if (w1>0 && h1>0) {
-                       int w2 = draw->allocation.width;
-                       int h2 = draw->allocation.height;
-                       gdk_draw_layout(draw->window, gc, (w2-w1)/2,(h2-h1)/2,layout);
-                       hq(TRUE, FALSE);
+                       int w2 = gtk_widget_get_allocated_width(draw);
+                       int h2 = gtk_widget_get_allocated_height(draw);
+
+                       int rw1, rh1;
+                       if (rotation == 0 || rotation == 2) {
+                               rw1 = w1;
+                               rh1 = h1;
+                       } else {
+                               rw1 = h1;
+                               rh1 = w1;
+                       }
+
+                       double s = min ((double)w2/rw1, (double)h2/rh1);
+
+                       cairo_save(cr);
+
+                       GdkRGBA color;
+                       gtk_style_context_get_color (gtk_widget_get_style_context(draw),
+                               GTK_STATE_NORMAL, &color);
+                       gdk_cairo_set_source_rgba(cr, &color);
+
+
+                       if (alignment == 1) { // left align
+                               cairo_translate(cr, (s * rw1)/2, h2/2);
+                       } else if (alignment == 2) { // right align
+                               cairo_translate(cr, w2 - (s * rw1)/2, h2/2);
+                       } else {
+                               cairo_translate(cr, w2/2, h2/2);
+                       }
+                       cairo_rotate(cr, rotation * M_PI_2);
+                       cairo_scale(cr, s, s);
+                       cairo_translate(cr, -w1/2, -h1/2);
+                       pango_cairo_show_layout (cr, layout);
+
+                       cairo_restore(cr);
+
+                       if (quality_high_handler) 
+                               g_source_remove(quality_high_handler);
+                       quality_high_handler = g_timeout_add(0, quality_high, NULL);
                }
+               g_object_unref(layout);
        }
 }
 
+static gboolean text_keypress(GtkWidget *widget, GdkEventButton *event, gpointer *user_data) {
+       // forward signal to the text view
+       gboolean ret;
+       g_signal_emit_by_name(tv, "key-press-event", event, &ret);
+       gtk_widget_grab_focus(tv);
+       return ret;
+}
+
 static gboolean text_clicked(GtkWidget *widget, GdkEventButton *event, gpointer *user_data) {
+       show_entry();
        if (event->type == GDK_BUTTON_PRESS && event->button == 2) {
                GtkClipboard *cb = gtk_clipboard_get(GDK_SELECTION_PRIMARY);
 
@@ -100,116 +211,239 @@ static gboolean text_clicked(GtkWidget *widget, GdkEventButton *event, gpointer
        return FALSE;
 }
 
-static void resize() {
-       int w1, h1, w2, h2;
-       pango_layout_get_pixel_size(layout, &w1, &h1);
-       if (w1>0 && h1>0) {
-               w2 = draw->allocation.width;
-               h2 = draw->allocation.height;
-               int s = pango_font_description_get_size(font);
-               s = min ((s*w2/w1), (s*h2/h1));
-               pango_font_description_set_size(font,s);
-               pango_layout_set_font_description(layout, font);
-               need_resize = FALSE;
+static gboolean read_chan(GIOChannel *chan, GIOCondition condition, gpointer data){
+       gchar buf[1024];
+       GString *input;
+       GIOStatus stat = G_IO_STATUS_NORMAL;
+       gsize read;
+       GError *err = NULL;
+
+       while ((stat = g_io_channel_read_chars(chan, buf, sizeof(buf), &read, &err)) == G_IO_STATUS_NORMAL && err == NULL) {
+               g_string_append_len(partial_input, buf, read);
+       }
+
+       if (err != NULL)
+       {
+           fprintf (stderr, "Unable to read stdin: %s\n", err->message);
+           g_error_free (err);
+           return TRUE;
        }
+
+
+       if (stat == G_IO_STATUS_EOF) {
+               // There is an end of file, so use the whole input
+               input = g_string_new_len(partial_input->str, partial_input->len);
+               g_string_truncate(partial_input, 0);
+       } else {
+               // There is no end of file. Check for form feed characters.
+               // Use from the second-to-last to the last.
+               char *last_ff = strrchr(partial_input->str, '\f');
+               if (last_ff) {
+                       *last_ff = '\0';
+                       char *snd_last_ff = strrchr(partial_input->str, '\f');
+                       if (snd_last_ff == NULL) snd_last_ff = partial_input->str;
+                       input = g_string_new_len(snd_last_ff, last_ff - snd_last_ff);
+                       g_string_erase(partial_input, 0, last_ff - partial_input->str + 1);
+               } else {
+                       return TRUE;
+               }
+       }
+
+       // remove beginning and trailing newlines, if any
+       gssize cnt = 0;
+       while ((input->len > cnt) && (input->str[cnt] == '\n')) {
+               cnt++;
+       }
+       g_string_erase(input, 0, cnt);
+
+       while ((input->len > 0) && (input->str[input->len - 1] == '\n')) {
+               g_string_truncate(input, input->len - 1);
+       }
+
+       g_signal_handler_block (tb, text_change_handler);
+       gtk_text_buffer_set_text (tb, input->str, input->len);
+       g_signal_handler_unblock (tb, text_change_handler);
+
+       g_string_free(input, TRUE);
+
+       if (stat == G_IO_STATUS_AGAIN)
+               return TRUE;
        else
-               need_resize = TRUE;
+               return FALSE;
 }
 
-
-static void newtext(char *text) {
-       pango_layout_set_text(layout, get_text(), -1);
-       resize();
+static void newtext() {
+       if (quality_high_handler) {
+               g_source_remove(quality_high_handler);
+               quality_high_handler = 0;
+       }
        hq(FALSE, TRUE);
 }
 
+static void newtext_show_input() {
+       show_entry();
+}
+
+static void move_cursor(GtkTextView* tv, GtkMovementStep step, gint count, gboolean extend_selection, gpointer user_data) {
+       show_entry();
+}
+
+static struct option const long_options[] =
+{
+       {"help",       no_argument,       NULL, 'h'},
+       {"version",    no_argument,       NULL, 'V'},
+       {"foreground", required_argument, NULL, 'f'},
+       {"background", required_argument, NULL, 'b'},
+       {"font",       required_argument, NULL, 'n'},
+       {"rotate",     required_argument, NULL, 'r'},
+       {"align",      required_argument, NULL, 'a'},
+       {0,0,0,0}
+};
+
+static void usage(char *cmd) {
+       printf("Usage: %s [-h|--help] [-V|--version] [-f|--foreground=colordesc] [-b|--background=colordesc] [-n|--font=fontdesc] [-r|--rotate=0,1,2,3] [-a|--align=0,1,2]\n", cmd);
+}
+
+static void version() {
+       printf("%s\n", PACKAGE_STRING);
+}
+
 int main(int argc, char **argv) {
        GString *input;
+       int c;
+       int input_provided = 0;
+
+       while ((c = getopt_long (argc, argv, "hVf:b:n:r:a:", long_options, (int *) 0)) != EOF) {
+               switch (c) {
+                       case 'h':
+                               usage(argv[0]);
+                               return 0;
+                               break;
+
+                       case 'V':
+                               version();
+                               return 0;
+                               break;
+
+                       case 'f':
+                               foreground = optarg;
+                               break;
+
+                       case 'b':
+                               background = optarg;
+                               break;
+
+                       case 'n':
+                               fontdesc = optarg;
+                               break;
+                       case 'r':
+                               rotation = atoi(optarg);
+                               break;
+                       case 'a':
+                               alignment = atoi(optarg);
+                               break;
+                       default:
+                               /* unknown switch received - at least
+                                * give usage but continue and use the
+                                * data */
+                               usage(argv[0]);
+                               break;
+               }
+       }
 
        gtk_init(&argc, &argv);
 
        window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
-       gtk_window_set_decorated(GTK_WINDOW(window), FALSE);
+       gtk_window_set_icon_name (GTK_WINDOW (window), "sm");
        gtk_window_fullscreen(GTK_WINDOW(window));
+
        g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
 
        settings = gtk_settings_get_default();
-       GdkColormap *colormap = gtk_widget_get_colormap(GTK_WIDGET(window));
-       GdkColor white, black;
-       gdk_colormap_alloc_color(colormap, &white, TRUE, TRUE);
-       gdk_color_parse("white", &white);
-       gdk_color_parse("black", &black);
-       gtk_widget_modify_bg(window, GTK_STATE_NORMAL, &white);
-       gtk_widget_modify_fg(window, GTK_STATE_NORMAL, &black);
+       GdkRGBA  white, black;
+       if (foreground != NULL) {
+               gdk_rgba_parse(&black, foreground);
+       } else {
+               gdk_rgba_parse(&black, "black");
+       }
+       if (background != NULL) {
+               gdk_rgba_parse(&white, background);
+       } else {
+               gdk_rgba_parse(&white, "white");
+       }
 
        draw = gtk_drawing_area_new();
-       gtk_widget_set_events(draw, GDK_BUTTON_PRESS_MASK);
+       gtk_widget_set_events(draw, GDK_BUTTON_PRESS_MASK|GDK_KEY_PRESS_MASK);
        gtk_widget_set_size_request(draw,400,400);
-       gtk_widget_modify_bg(draw, GTK_STATE_NORMAL, &white);
-       gtk_widget_modify_fg(draw, GTK_STATE_NORMAL, &black);
-       g_signal_connect(G_OBJECT(draw), "realize", G_CALLBACK(realize), NULL);
+       gtk_widget_override_background_color(draw, GTK_STATE_NORMAL, &white);
+       gtk_widget_override_color(draw, GTK_STATE_NORMAL, &black);
        g_signal_connect(G_OBJECT(draw), "button-press-event", G_CALLBACK(text_clicked), NULL);
+       g_signal_connect(G_OBJECT(draw), "key-press-event", G_CALLBACK(text_keypress), NULL);
+       gtk_widget_set_can_focus(draw, TRUE);
 
-       GdkPixmap *pixmap = gdk_pixmap_new(NULL, 1, 1, 1);
-       GdkColor color;
-       cursor = gdk_cursor_new_from_pixmap(pixmap, pixmap, &color, &color, 0, 0);
+       cursor = gdk_cursor_new_for_display(gtk_widget_get_display(GTK_WIDGET(draw)), GDK_BLANK_CURSOR);
 
        tv = gtk_text_view_new();
-       gtk_widget_modify_bg(tv, GTK_STATE_NORMAL, &white);
-       gtk_widget_modify_fg(tv, GTK_STATE_NORMAL, &black);
        tb = gtk_text_view_get_buffer(GTK_TEXT_VIEW(tv));
 
-       if (argc > 1)
-               if (!strcmp(argv[1], "-") ) {
+       partial_input = g_string_new("");
+
+       if (argc > optind)
+               if (!strcmp(argv[optind], "-") ) {
                        // read from stdin
-                       gchar buf[1024];
-                       int num;
+                       GIOChannel *chan = g_io_channel_unix_new(0);
+                       g_io_channel_set_flags(chan, G_IO_FLAG_NONBLOCK, NULL);
+                       g_io_add_watch (chan, G_IO_IN | G_IO_HUP, &read_chan, NULL);
 
                        input = g_string_new("");
-
-                       while ((num = fread (buf, 1, sizeof(buf), stdin)) > 0) {
-                               g_string_append_len(input, buf, num);
-                       }
+                       input_provided++;
                } else {
                        int i;
 
                        input = g_string_new("");
 
-                       for (i = 1; i < argc; i++) {
+                       for (i = optind; i < argc; i++) {
                                g_string_append(input, argv[i]);
 
                                if (i < argc - 1) {
                                        g_string_append(input, " ");
                                }
                        }
+                       input_provided++;
                }
        else
                input = g_string_new(":-)");
 
        gtk_text_buffer_set_text(tb, input->str, input->len);
+       g_string_free(input, TRUE);
+       GtkTextIter start, end;
+       gtk_text_buffer_get_bounds(tb, &start, &end);
+       gtk_text_buffer_select_range(tb, &start, &end);
 
-       quit = gtk_button_new_from_stock(GTK_STOCK_QUIT);
+       quit = gtk_button_new_from_icon_name("application-exit", GTK_ICON_SIZE_BUTTON);
        g_signal_connect(G_OBJECT(quit), "clicked", G_CALLBACK(gtk_main_quit), NULL);
-       gtk_widget_modify_bg(quit, GTK_STATE_NORMAL, &white);
-       gtk_widget_modify_fg(quit, GTK_STATE_NORMAL, &black);
 
-       GtkWidget *hbox = gtk_hbox_new(FALSE,0);
+       GtkWidget *vbox_button = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
+       gtk_box_pack_end(GTK_BOX(vbox_button), quit, FALSE, FALSE, 0);
+
+       GtkWidget *hbox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL,0);
+       entry_widget = hbox;
        gtk_box_pack_start(GTK_BOX(hbox), tv,   TRUE,  TRUE,  0);
-       gtk_box_pack_start(GTK_BOX(hbox), quit, FALSE, FALSE, 0);
+       gtk_box_pack_start(GTK_BOX(hbox), vbox_button, FALSE, FALSE, 0);
 
-       GtkWidget *vbox = gtk_vbox_new(FALSE,0);
-       gtk_box_pack_start(GTK_BOX(vbox), draw, TRUE,  TRUE,  0);
-       gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, FALSE, 0);
+       GtkWidget *vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL,0);
+       gtk_box_pack_start(GTK_BOX(vbox), draw, TRUE, TRUE, 0);
+       gtk_box_pack_end(GTK_BOX(vbox), hbox, FALSE, FALSE, 0);
 
        gtk_container_add(GTK_CONTAINER(window), vbox);
 
        font = pango_font_description_new();
-        pango_font_description_set_family(font, "sans-serif");
-       pango_font_description_set_size(font, 20*PANGO_SCALE);
-
-       layout=  gtk_widget_create_pango_layout(draw,get_text());
-       pango_layout_set_font_description(layout, font);
-       pango_layout_set_alignment(layout,PANGO_ALIGN_CENTER);
+       if (fontdesc != NULL) {
+               pango_font_description_set_family(font, fontdesc);
+       } else {
+               pango_font_description_set_family(font, "sans-serif");
+       }
+       pango_font_description_set_size(font, 200*PANGO_SCALE);
 
        GtkAccelGroup *accel = gtk_accel_group_new();
        guint key;
@@ -221,9 +455,17 @@ int main(int argc, char **argv) {
        gtk_window_add_accel_group(GTK_WINDOW(window), accel);
        gtk_widget_show_all(window);
 
-       g_signal_connect(G_OBJECT(draw), "configure-event", G_CALLBACK(resize), NULL);
-       g_signal_connect(G_OBJECT(draw), "expose-event", G_CALLBACK(redraw), NULL);
+       g_signal_connect_after(G_OBJECT(draw), "draw", G_CALLBACK(redraw), NULL);
+       text_change_handler = g_signal_connect(G_OBJECT(tb), "changed", G_CALLBACK(newtext_show_input), NULL);
        g_signal_connect(G_OBJECT(tb), "changed", G_CALLBACK(newtext), NULL);
+       g_signal_connect(G_OBJECT(tv), "move-cursor", G_CALLBACK(move_cursor), NULL);
+
+       if (input_provided)
+               hide_entry(NULL);
+       else
+               show_entry();
 
        gtk_main();
+
+       return 0;
 }