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 Tooltip g_tooltip;
  38
  39
  40 void default_tooltip()
  41 {
  42         // give the tooltip some reasonable default values
  43         memset(&g_tooltip, 0, sizeof(Tooltip));
  44
  45         g_tooltip.font_color.color[0] = 1;
  46         g_tooltip.font_color.color[1] = 1;
  47         g_tooltip.font_color.color[2] = 1;
  48         g_tooltip.font_color.alpha = 1;
  49 }
  50
  51 void cleanup_tooltip()
  52 {
  53         stop_tooltip_timeout();
  54         tooltip_hide(0);
  55         tooltip_copy_text(0);
  56         if (g_tooltip.window) XDestroyWindow(server.dsp, g_tooltip.window);
  57         if (g_tooltip.font_desc) pango_font_description_free(g_tooltip.font_desc);
  58 }
  59
  60
  61 void init_tooltip()
  62 {
  63         if (!g_tooltip.font_desc)
  64                 g_tooltip.font_desc = pango_font_description_from_string("sans 10");
  65         if (g_tooltip.bg == 0)
  66                 g_tooltip.bg = &g_array_index(backgrounds, Background, 0);
  67
  68         XSetWindowAttributes attr;
  69         attr.override_redirect = True;
  70         attr.event_mask = StructureNotifyMask;
  71         attr.colormap = server.colormap;
  72         attr.background_pixel = 0;
  73         attr.border_pixel = 0;
  74         unsigned long mask = CWEventMask|CWColormap|CWBorderPixel|CWBackPixel|CWOverrideRedirect;
  75         if (g_tooltip.window) XDestroyWindow(server.dsp, g_tooltip.window);
  76         g_tooltip.window = XCreateWindow(server.dsp, server.root_win, 0, 0, 100, 20, 0, server.depth, InputOutput, server.visual, mask, &attr);
  77 }
  78
  79
  80 void tooltip_trigger_show(Area* area, Panel* p, XEvent *e)
  81 {
  82         // Position the tooltip in the center of the area
  83         x = area->posx + area->width / 2 + e->xmotion.x_root - e->xmotion.x;
  84         y = area->posy + area->height / 2 + e->xmotion.y_root - e->xmotion.y;
  85         if (!panel_horizontal)
  86                 y -= height/2;
  87         g_tooltip.panel = p;
  88         if (g_tooltip.mapped && g_tooltip.area != area) {
  89                 tooltip_copy_text(area);
  90                 tooltip_update();
  91                 stop_tooltip_timeout();
  92         }
  93         else if (!g_tooltip.mapped) {
  94                 start_show_timeout();
  95         }
  96 }
  97
  98
  99 void tooltip_show(void* arg)
 100 {
 101         int mx, my;
 102         Window w;
 103         XTranslateCoordinates( server.dsp, server.root_win, g_tooltip.panel->main_win, x, y, &mx, &my, &w);
 104         Area* area;
 105         if (!panel_horizontal)
 106                 my += height/2; /* we adjusted y in tooltip_trigger_show, revert or we won't find the correct area anymore */
 107         area = click_area(g_tooltip.panel, mx, my);
 108         stop_tooltip_timeout();
 109         if (!g_tooltip.mapped && area->_get_tooltip_text) {
 110                 tooltip_copy_text(area);
 111                 g_tooltip.mapped = True;
 112                 XMapWindow(server.dsp, g_tooltip.window);
 113                 tooltip_update();
 114                 XFlush(server.dsp);
 115         }
 116 }
 117
 118
 119 void tooltip_update_geometry()
 120 {
 121         cairo_surface_t *cs;
 122         cairo_t *c;
 123         PangoLayout* layout;
 124         cs = cairo_xlib_surface_create(server.dsp, g_tooltip.window, server.visual, width, height);
 125         c = cairo_create(cs);
 126         layout = pango_cairo_create_layout(c);
 127         pango_layout_set_font_description(layout, g_tooltip.font_desc);
 128         pango_layout_set_text(layout, g_tooltip.tooltip_text, -1);
 129         PangoRectangle r1, r2;
 130         pango_layout_get_pixel_extents(layout, &r1, &r2);
 131         width = 2*g_tooltip.bg->border.width + 2*g_tooltip.paddingx + r2.width;
 132         height = 2*g_tooltip.bg->border.width + 2*g_tooltip.paddingy + r2.height;
 133
 134         Panel* panel = g_tooltip.panel;
 135         if (panel_horizontal && panel_position & BOTTOM)
 136                 y = panel->posy-height;
 137         else if (panel_horizontal && panel_position & TOP)
 138                 y = panel->posy + panel->area.height;
 139         else if (panel_position & LEFT)
 140                 x = panel->posx + panel->area.width;
 141         else
 142                 x = panel->posx - width;
 143
 144         g_object_unref(layout);
 145         cairo_destroy(c);
 146         cairo_surface_destroy(cs);
 147 }
 148
 149
 150 void tooltip_adjust_geometry()
 151 {
 152         // adjust coordinates and size to not go offscreen
 153         // it seems quite impossible that the height needs to be adjusted, but we do it anyway.
 154
 155         int min_x, min_y, max_width, max_height;
 156         Panel* panel = g_tooltip.panel;
 157         int screen_width = server.monitor[panel->monitor].x + server.monitor[panel->monitor].width;
 158         int screen_height = server.monitor[panel->monitor].y + server.monitor[panel->monitor].height;
 159         if ( x+width <= screen_width && y+height <= screen_height && x>=server.monitor[panel->monitor].x && y>=server.monitor[panel->monitor].y )
 160                 return;    // no adjustment needed
 161
 162         if (panel_horizontal) {
 163                 min_x=0;
 164                 max_width=server.monitor[panel->monitor].width;
 165                 max_height=server.monitor[panel->monitor].height-panel->area.height;
 166                 if (panel_position & BOTTOM)
 167                         min_y=0;
 168                 else
 169                         min_y=panel->area.height;
 170         }
 171         else {
 172                 max_width=server.monitor[panel->monitor].width-panel->area.width;
 173                 min_y=0;
 174                 max_height=server.monitor[panel->monitor].height;
 175                 if (panel_position & LEFT)
 176                         min_x=panel->area.width;
 177                 else
 178                         min_x=0;
 179         }
 180
 181         if (x+width > server.monitor[panel->monitor].x + server.monitor[panel->monitor].width)
 182                 x = server.monitor[panel->monitor].x + server.monitor[panel->monitor].width - width;
 183         if ( y+height > server.monitor[panel->monitor].y + server.monitor[panel->monitor].height)
 184                 y = server.monitor[panel->monitor].y + server.monitor[panel->monitor].height - height;
 185
 186         if (x<min_x)
 187                 x=min_x;
 188         if (width>max_width)
 189                 width = max_width;
 190         if (y<min_y)
 191                 y=min_y;
 192         if (height>max_height)
 193                 height=max_height;
 194 }
 195
 196 void tooltip_update()
 197 {
 198         if (!g_tooltip.tooltip_text) {
 199                 tooltip_hide(0);
 200                 return;
 201         }
 202
 203         tooltip_update_geometry();
 204         tooltip_adjust_geometry();
 205         XMoveResizeWindow(server.dsp, g_tooltip.window, x, y, width, height);
 206
 207         // Stuff for drawing the tooltip
 208         cairo_surface_t *cs;
 209         cairo_t *c;
 210         PangoLayout* layout;
 211         cs = cairo_xlib_surface_create(server.dsp, g_tooltip.window, server.visual, width, height);
 212         c = cairo_create(cs);
 213         Color bc = g_tooltip.bg->back;
 214         Border b = g_tooltip.bg->border;
 215         if (server.real_transparency) {
 216                 clear_pixmap(g_tooltip.window, 0, 0, width, height);
 217                 draw_rect(c, b.width, b.width, width-2*b.width, height-2*b.width, b.rounded-b.width/1.571);
 218                 cairo_set_source_rgba(c, bc.color[0], bc.color[1], bc.color[2], bc.alpha);
 219         }
 220         else {
 221                 cairo_rectangle(c, 0., 0, width, height);
 222                 cairo_set_source_rgb(c, bc.color[0], bc.color[1], bc.color[2]);
 223         }
 224         cairo_fill(c);
 225         cairo_set_line_width(c, b.width);
 226         if (server.real_transparency)
 227                 draw_rect(c, b.width/2.0, b.width/2.0, width - b.width, height - b.width, b.rounded);
 228         else
 229                 cairo_rectangle(c, b.width/2.0, b.width/2.0, width-b.width, height-b.width);
 230         cairo_set_source_rgba(c, b.color[0], b.color[1], b.color[2], b.alpha);
 231         cairo_stroke(c);
 232
 233         Color fc = g_tooltip.font_color;
 234         cairo_set_source_rgba(c, fc.color[0], fc.color[1], fc.color[2], fc.alpha);
 235         layout = pango_cairo_create_layout(c);
 236         pango_layout_set_font_description(layout, g_tooltip.font_desc);
 237         pango_layout_set_text(layout, g_tooltip.tooltip_text, -1);
 238         PangoRectangle r1, r2;
 239         pango_layout_get_pixel_extents(layout, &r1, &r2);
 240         pango_layout_set_width(layout, width*PANGO_SCALE);
 241         pango_layout_set_height(layout, height*PANGO_SCALE);
 242         pango_layout_set_ellipsize(layout, PANGO_ELLIPSIZE_END);
 243         // 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.)
 244         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);
 245         pango_cairo_show_layout (c, layout);
 246
 247         g_object_unref (layout);
 248         cairo_destroy (c);
 249         cairo_surface_destroy (cs);
 250 }
 251
 252
 253 void tooltip_trigger_hide(Tooltip* tooltip)
 254 {
 255         if (g_tooltip.mapped) {
 256                 tooltip_copy_text(0);
 257                 start_hide_timeout();
 258         }
 259         else {
 260                 // tooltip not visible yet, but maybe a timeout is still pending
 261                 stop_tooltip_timeout();
 262         }
 263 }
 264
 265
 266 void tooltip_hide(void* arg)
 267 {
 268         stop_tooltip_timeout();
 269         if (g_tooltip.mapped) {
 270                 g_tooltip.mapped = False;
 271                 XUnmapWindow(server.dsp, g_tooltip.window);
 272                 XFlush(server.dsp);
 273         }
 274 }
 275
 276
 277 void start_show_timeout()
 278 {
 279         if (g_tooltip.timeout)
 280                 change_timeout(g_tooltip.timeout, g_tooltip.show_timeout_msec, 0, tooltip_show, 0);
 281         else
 282                 g_tooltip.timeout = add_timeout(g_tooltip.show_timeout_msec, 0, tooltip_show, 0);
 283 }
 284
 285
 286 void start_hide_timeout()
 287 {
 288         if (g_tooltip.timeout)
 289                 change_timeout(g_tooltip.timeout, g_tooltip.hide_timeout_msec, 0, tooltip_hide, 0);
 290         else
 291                 g_tooltip.timeout = add_timeout(g_tooltip.hide_timeout_msec, 0, tooltip_hide, 0);
 292 }
 293
 294
 295 void stop_tooltip_timeout()
 296 {
 297         if (g_tooltip.timeout) {
 298                 stop_timeout(g_tooltip.timeout);
 299                 g_tooltip.timeout = 0;
 300         }
 301 }
 302
 303
 304 void tooltip_copy_text(Area* area)
 305 {
 306         free(g_tooltip.tooltip_text);
 307         if (area && area->_get_tooltip_text)
 308                 g_tooltip.tooltip_text = strdup(area->_get_tooltip_text(area));
 309         else
 310                 g_tooltip.tooltip_text = 0;
 311         g_tooltip.area = area;
 312 }