Dogcows Code - chaz/tint2/blob - src/tooltip/tooltip.c

   1 /**************************************************************************
   2 *
   3 * Copyright (C) 2009 Andreas.Fink (Andreas.Fink85@gmail.com)
   4 *
   5 * This program is free software; you can redistribute it and/or
   6 * modify it under the terms of the GNU General Public License version 2
   7 * as published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 * You should have received a copy of the GNU General Public License
  14 * along with this program; if not, write to the Free Software
  15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  16 **************************************************************************/
  17
  18 #include <stdio.h>
  19 #include <unistd.h>
  20 #include <string.h>
  21 #include <stdlib.h>
  22 #include <cairo.h>
  23 #include <cairo-xlib.h>
  24
  25 #include "server.h"
  26 #include "tooltip.h"
  27 #include "panel.h"
  28 #include "timer.h"
  29
  30 static int x, y, width, height;
  31
  32 // the next functions are helper functions for tooltip handling
  33 void start_show_timeout();
  34 void start_hide_timeout();
  35 void stop_tooltip_timeout();
  36
  37 // give the tooltip some reasonable default values
  38 Tooltip g_tooltip = {
  39         .tooltip_text = 0,
  40         .area = 0,
  41         .panel = 0,
  42         .window = 0,
  43         .show_timeout_msec = 0,
  44         .hide_timeout_msec = 0,
  45         .enabled = False,
  46         .mapped = False,
  47         .paddingx = 0,
  48         .paddingy = 0,
  49         .font_color = { .color={1, 1, 1}, .alpha=1 },
  50         .bg = 0,
  51         .font_desc = 0,
  52         .timeout = 0
  53 };
  54
  55 void init_tooltip()
  56 {
  57         if (!g_tooltip.font_desc)
  58                 g_tooltip.font_desc = pango_font_description_from_string("sans 10");
  59
  60         XSetWindowAttributes attr;
  61         attr.override_redirect = True;
  62         attr.event_mask = StructureNotifyMask;
  63         attr.colormap = server.colormap;
  64         attr.background_pixel = 0;
  65         attr.border_pixel = 0;
  66         unsigned long mask = CWEventMask|CWColormap|CWBorderPixel|CWBackPixel|CWOverrideRedirect;
  67         if (g_tooltip.window) XDestroyWindow(server.dsp, g_tooltip.window);
  68         g_tooltip.window = XCreateWindow(server.dsp, server.root_win, 0, 0, 100, 20, 0, server.depth, InputOutput, server.visual, mask, &attr);
  69 }
  70
  71
  72 void cleanup_tooltip()
  73 {
  74         stop_tooltip_timeout();
  75         tooltip_hide(0);
  76         g_tooltip.enabled = False;
  77         tooltip_copy_text(0);
  78         if (g_tooltip.window) {
  79                 XDestroyWindow(server.dsp, g_tooltip.window);
  80                 g_tooltip.window = 0;
  81         }
  82         if (g_tooltip.font_desc) {
  83                 pango_font_description_free(g_tooltip.font_desc);
  84                 g_tooltip.font_desc = 0;
  85         }
  86 }
  87
  88
  89 void tooltip_trigger_show(Area* area, Panel* p, int x_root, int y_root)
  90 {
  91         x = x_root;
  92         y = y_root;
  93         g_tooltip.panel = p;
  94         if (g_tooltip.mapped && g_tooltip.area != area) {
  95                 tooltip_copy_text(area);
  96                 tooltip_update();
  97                 stop_tooltip_timeout();
  98         }
  99         else if (!g_tooltip.mapped) {
 100                 start_show_timeout();
 101         }
 102 }
 103
 104
 105 void tooltip_show(void* arg)
 106 {
 107   int mx, my;
 108   Window w;
 109   XTranslateCoordinates( server.dsp, server.root_win, g_tooltip.panel->main_win, x, y, &mx, &my, &w);
 110   Area* area = click_area(g_tooltip.panel, mx, my);
 111         stop_tooltip_timeout();
 112         if (!g_tooltip.mapped && area->_get_tooltip_text) {
 113                 tooltip_copy_text(area);
 114                 g_tooltip.mapped = True;
 115                 XMapWindow(server.dsp, g_tooltip.window);
 116                 tooltip_update();
 117                 XFlush(server.dsp);
 118         }
 119 }
 120
 121
 122 void tooltip_update_geometry()
 123 {
 124         cairo_surface_t *cs;
 125         cairo_t *c;
 126         PangoLayout* layout;
 127         cs = cairo_xlib_surface_create(server.dsp, g_tooltip.window, server.visual, width, height);
 128         c = cairo_create(cs);
 129         layout = pango_cairo_create_layout(c);
 130         pango_layout_set_font_description(layout, g_tooltip.font_desc);
 131         pango_layout_set_text(layout, g_tooltip.tooltip_text, -1);
 132         PangoRectangle r1, r2;
 133         pango_layout_get_pixel_extents(layout, &r1, &r2);
 134         width = 2*g_tooltip.bg->border.width + 2*g_tooltip.paddingx + r2.width;
 135         height = 2*g_tooltip.bg->border.width + 2*g_tooltip.paddingy + r2.height;
 136
 137         Panel* panel = g_tooltip.panel;
 138         if (panel_horizontal && panel_position & BOTTOM)
 139                 y = panel->posy-height;
 140         else if (panel_horizontal && panel_position & TOP)
 141                 y = panel->posy + panel->area.height;
 142         else if (panel_position & LEFT)
 143                 x = panel->posx + panel->area.width;
 144         else
 145                 x = panel->posx - width;
 146
 147         g_object_unref(layout);
 148         cairo_destroy(c);
 149         cairo_surface_destroy(cs);
 150 }
 151
 152
 153 void tooltip_adjust_geometry()
 154 {
 155         // adjust coordinates and size to not go offscreen
 156         // it seems quite impossible that the height needs to be adjusted, but we do it anyway.
 157
 158         int min_x, min_y, max_width, max_height;
 159         Panel* panel = g_tooltip.panel;
 160         int screen_width = server.monitor[panel->monitor].x + server.monitor[panel->monitor].width;
 161         int screen_height = server.monitor[panel->monitor].y + server.monitor[panel->monitor].height;
 162         if ( x+width <= screen_width && y+height <= screen_height && x>=0 && y>=0)
 163                 return;    // no adjustment needed
 164
 165         if (panel_horizontal) {
 166                 min_x=0;
 167                 max_width=screen_width;
 168                 max_height=screen_height-panel->area.height;
 169                 if (panel_position & BOTTOM)
 170                         min_y=0;
 171                 else
 172                         min_y=panel->area.height;
 173         }
 174         else {
 175                 max_width=screen_width-panel->area.width;
 176                 min_y=0;
 177                 max_height=screen_height;
 178                 if (panel_position & LEFT)
 179                         min_x=panel->area.width;
 180                 else
 181                         min_x=0;
 182         }
 183
 184         if (x+width > server.monitor[panel->monitor].x + server.monitor[panel->monitor].width)
 185                 x = server.monitor[panel->monitor].x + server.monitor[panel->monitor].width - width;
 186         if ( y+height > server.monitor[panel->monitor].y + server.monitor[panel->monitor].height)
 187                 y = server.monitor[panel->monitor].y + server.monitor[panel->monitor].height - height;
 188
 189         if (x<min_x)
 190                 x=min_x;
 191         if (width>max_width)
 192                 width = max_width;
 193         if (y<min_y)
 194                 y=min_y;
 195         if (height>max_height)
 196                 height=max_height;
 197 }
 198
 199 void tooltip_update()
 200 {
 201         if (!g_tooltip.tooltip_text) {
 202                 tooltip_hide(0);
 203                 return;
 204         }
 205
 206         tooltip_update_geometry();
 207         tooltip_adjust_geometry();
 208         XMoveResizeWindow(server.dsp, g_tooltip.window, x, y, width, height);
 209
 210         // Stuff for drawing the tooltip
 211         cairo_surface_t *cs;
 212         cairo_t *c;
 213         PangoLayout* layout;
 214         cs = cairo_xlib_surface_create(server.dsp, g_tooltip.window, server.visual, width, height);
 215         c = cairo_create(cs);
 216         Color bc = g_tooltip.bg->back;
 217         Border b = g_tooltip.bg->border;
 218         if (real_transparency) {
 219                 clear_pixmap(g_tooltip.window, 0, 0, width, height);
 220                 draw_rect(c, b.width, b.width, width-2*b.width, height-2*b.width, b.rounded-b.width/1.571);
 221                 cairo_set_source_rgba(c, bc.color[0], bc.color[1], bc.color[2], bc.alpha);
 222         }
 223         else {
 224                 cairo_rectangle(c, 0., 0, width, height);
 225                 cairo_set_source_rgb(c, bc.color[0], bc.color[1], bc.color[2]);
 226         }
 227         cairo_fill(c);
 228         cairo_set_line_width(c, b.width);
 229         if (real_transparency) draw_rect(c, b.width/2.0, b.width/2.0, width - b.width, height - b.width, b.rounded);
 230         else cairo_rectangle(c, b.width/2.0, b.width/2.0, width-b.width, height-b.width);
 231         cairo_set_source_rgba(c, b.color[0], b.color[1], b.color[2], b.alpha);
 232         cairo_stroke(c);
 233
 234         Color fc = g_tooltip.font_color;
 235         cairo_set_source_rgba(c, fc.color[0], fc.color[1], fc.color[2], fc.alpha);
 236         layout = pango_cairo_create_layout(c);
 237         pango_layout_set_font_description(layout, g_tooltip.font_desc);
 238         pango_layout_set_text(layout, g_tooltip.tooltip_text, -1);
 239         PangoRectangle r1, r2;
 240         pango_layout_get_pixel_extents(layout, &r1, &r2);
 241         pango_layout_set_width(layout, width*PANGO_SCALE);
 242         pango_layout_set_height(layout, height*PANGO_SCALE);
 243         pango_layout_set_ellipsize(layout, PANGO_ELLIPSIZE_END);
 244         // I do not know why this is the right way, but with the below cairo_move_to it seems to be centered (horiz. and vert.)
 245         cairo_move_to(c, -r1.x/2+g_tooltip.bg->border.width+g_tooltip.paddingx, -r1.y/2+g_tooltip.bg->border.width+g_tooltip.paddingy);
 246         pango_cairo_show_layout (c, layout);
 247
 248         g_object_unref (layout);
 249         cairo_destroy (c);
 250         cairo_surface_destroy (cs);
 251 }
 252
 253
 254 void tooltip_trigger_hide(Tooltip* tooltip)
 255 {
 256         if (g_tooltip.mapped) {
 257                 tooltip_copy_text(0);
 258                 start_hide_timeout();
 259         }
 260         else {
 261                 // tooltip not visible yet, but maybe a timeout is still pending
 262                 stop_tooltip_timeout();
 263         }
 264 }
 265
 266
 267 void tooltip_hide(void* arg)
 268 {
 269         stop_tooltip_timeout();
 270         if (g_tooltip.mapped) {
 271                 g_tooltip.mapped = False;
 272                 XUnmapWindow(server.dsp, g_tooltip.window);
 273                 XFlush(server.dsp);
 274         }
 275 }
 276
 277
 278 void start_show_timeout()
 279 {
 280         if (g_tooltip.timeout)
 281                 change_timeout(g_tooltip.timeout, g_tooltip.show_timeout_msec, 0, tooltip_show, 0);
 282         else
 283                 g_tooltip.timeout = add_timeout(g_tooltip.show_timeout_msec, 0, tooltip_show, 0);
 284 }
 285
 286
 287 void start_hide_timeout()
 288 {
 289         if (g_tooltip.timeout)
 290                 change_timeout(g_tooltip.timeout, g_tooltip.hide_timeout_msec, 0, tooltip_hide, 0);
 291         else
 292                 g_tooltip.timeout = add_timeout(g_tooltip.hide_timeout_msec, 0, tooltip_hide, 0);
 293 }
 294
 295
 296 void stop_tooltip_timeout()
 297 {
 298         if (g_tooltip.timeout) {
 299                 stop_timeout(g_tooltip.timeout);
 300                 g_tooltip.timeout = 0;
 301         }
 302 }
 303
 304
 305 void tooltip_copy_text(Area* area)
 306 {
 307         free(g_tooltip.tooltip_text);
 308         if (area && area->_get_tooltip_text)
 309                 g_tooltip.tooltip_text = strdup(area->_get_tooltip_text(area));
 310         else
 311                 g_tooltip.tooltip_text = 0;
 312         g_tooltip.area = area;
 313 }