350 lines
12 KiB
C
350 lines
12 KiB
C
/**************************************************************************
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*
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* Copyright (C) 2009 Andreas.Fink (Andreas.Fink85@gmail.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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**************************************************************************/
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <cairo.h>
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#include <cairo-xlib.h>
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#include "server.h"
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#include "tooltip.h"
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#include "panel.h"
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#include "timer.h"
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static int x, y, width, height;
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static gboolean just_shown;
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// the next functions are helper functions for tooltip handling
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void start_show_timeout();
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void start_hide_timeout();
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void stop_tooltip_timeout();
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void tooltip_init_fonts();
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Tooltip g_tooltip;
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void default_tooltip()
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{
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// give the tooltip some reasonable default values
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memset(&g_tooltip, 0, sizeof(Tooltip));
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g_tooltip.font_color.rgb[0] = 1;
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g_tooltip.font_color.rgb[1] = 1;
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g_tooltip.font_color.rgb[2] = 1;
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g_tooltip.font_color.alpha = 1;
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just_shown = FALSE;
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}
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void cleanup_tooltip()
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{
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stop_tooltip_timeout();
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tooltip_hide(NULL);
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tooltip_update_contents_for(NULL);
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if (g_tooltip.window)
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XDestroyWindow(server.display, g_tooltip.window);
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g_tooltip.window = 0;
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pango_font_description_free(g_tooltip.font_desc);
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g_tooltip.font_desc = NULL;
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}
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void init_tooltip()
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{
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if (!g_tooltip.bg)
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g_tooltip.bg = &g_array_index(backgrounds, Background, 0);
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tooltip_init_fonts();
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XSetWindowAttributes attr;
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attr.override_redirect = True;
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attr.event_mask = StructureNotifyMask;
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attr.colormap = server.colormap;
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attr.background_pixel = 0;
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attr.border_pixel = 0;
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unsigned long mask = CWEventMask | CWColormap | CWBorderPixel | CWBackPixel | CWOverrideRedirect;
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if (g_tooltip.window)
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XDestroyWindow(server.display, g_tooltip.window);
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g_tooltip.window = XCreateWindow(server.display,
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server.root_win,
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0,
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0,
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100,
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20,
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0,
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server.depth,
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InputOutput,
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server.visual,
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mask,
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&attr);
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}
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void tooltip_init_fonts()
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{
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if (!g_tooltip.font_desc)
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g_tooltip.font_desc = pango_font_description_from_string(get_default_font());
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}
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void tooltip_default_font_changed()
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{
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if (g_tooltip.has_font)
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return;
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if (!g_tooltip.has_font) {
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pango_font_description_free(g_tooltip.font_desc);
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g_tooltip.font_desc = NULL;
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}
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tooltip_init_fonts();
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tooltip_update();
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}
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void tooltip_trigger_show(Area *area, Panel *p, XEvent *e)
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{
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// Position the tooltip in the center of the area
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x = area->posx + MIN(area->width / 3, 22) + e->xmotion.x_root - e->xmotion.x;
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y = area->posy + area->height / 2 + e->xmotion.y_root - e->xmotion.y;
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just_shown = TRUE;
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g_tooltip.panel = p;
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if (g_tooltip.mapped && g_tooltip.area != area) {
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tooltip_update_contents_for(area);
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tooltip_update();
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stop_tooltip_timeout();
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} else if (!g_tooltip.mapped) {
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start_show_timeout();
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}
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}
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void tooltip_show(void *arg)
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{
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int mx, my;
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Window w;
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XTranslateCoordinates(server.display, server.root_win, g_tooltip.panel->main_win, x, y, &mx, &my, &w);
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Area *area = find_area_under_mouse(g_tooltip.panel, mx, my);
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if (!g_tooltip.mapped && area->_get_tooltip_text) {
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tooltip_update_contents_for(area);
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g_tooltip.mapped = True;
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XMapWindow(server.display, g_tooltip.window);
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tooltip_update();
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XFlush(server.display);
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}
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}
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void tooltip_update_geometry()
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{
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Panel *panel = g_tooltip.panel;
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int screen_width = server.monitors[panel->monitor].x + server.monitors[panel->monitor].width;
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cairo_surface_t *cs = cairo_xlib_surface_create(server.display, g_tooltip.window, server.visual, width, height);
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cairo_t *c = cairo_create(cs);
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PangoLayout *layout = pango_cairo_create_layout(c);
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pango_layout_set_font_description(layout, g_tooltip.font_desc);
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PangoRectangle r1, r2;
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pango_layout_set_text(layout, "1234567890", -1);
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pango_layout_get_pixel_extents(layout, &r1, &r2);
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int max_width = MIN(r2.width * 7, screen_width * 2 / 3);
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pango_layout_set_width(layout, max_width * PANGO_SCALE);
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pango_layout_set_text(layout, g_tooltip.tooltip_text, -1);
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pango_layout_set_wrap(layout, PANGO_WRAP_WORD);
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pango_layout_get_pixel_extents(layout, &r1, &r2);
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width = left_right_bg_border_width(g_tooltip.bg) + 2 * g_tooltip.paddingx + r2.width;
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height = top_bottom_bg_border_width(g_tooltip.bg) + 2 * g_tooltip.paddingy + r2.height;
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if (g_tooltip.image) {
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width = MAX(width,
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left_right_bg_border_width(g_tooltip.bg) + 2 * g_tooltip.paddingx +
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cairo_image_surface_get_width(g_tooltip.image));
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height += g_tooltip.paddingy + cairo_image_surface_get_height(g_tooltip.image);
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}
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if (panel_horizontal && panel_position & BOTTOM)
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y = panel->posy - height;
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else if (panel_horizontal && panel_position & TOP)
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y = panel->posy + panel->area.height;
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else if (panel_position & LEFT)
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x = panel->posx + panel->area.width;
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else
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x = panel->posx - width;
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g_object_unref(layout);
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cairo_destroy(c);
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cairo_surface_destroy(cs);
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}
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void tooltip_adjust_geometry()
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{
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// adjust coordinates and size to not go offscreen
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// it seems quite impossible that the height needs to be adjusted, but we do it anyway.
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Panel *panel = g_tooltip.panel;
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int screen_width = server.monitors[panel->monitor].x + server.monitors[panel->monitor].width;
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int screen_height = server.monitors[panel->monitor].y + server.monitors[panel->monitor].height;
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if (x + width <= screen_width && y + height <= screen_height && x >= server.monitors[panel->monitor].x &&
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y >= server.monitors[panel->monitor].y)
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return; // no adjustment needed
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int min_x, min_y, max_width, max_height;
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if (panel_horizontal) {
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min_x = 0;
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max_width = server.monitors[panel->monitor].width;
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max_height = server.monitors[panel->monitor].height - panel->area.height;
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if (panel_position & BOTTOM)
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min_y = 0;
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else
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min_y = panel->area.height;
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} else {
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max_width = server.monitors[panel->monitor].width - panel->area.width;
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min_y = 0;
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max_height = server.monitors[panel->monitor].height;
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if (panel_position & LEFT)
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min_x = panel->area.width;
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else
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min_x = 0;
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}
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if (x + width > server.monitors[panel->monitor].x + server.monitors[panel->monitor].width)
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x = server.monitors[panel->monitor].x + server.monitors[panel->monitor].width - width;
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if (y + height > server.monitors[panel->monitor].y + server.monitors[panel->monitor].height)
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y = server.monitors[panel->monitor].y + server.monitors[panel->monitor].height - height;
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if (x < min_x)
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x = min_x;
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if (width > max_width)
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width = max_width;
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if (y < min_y)
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y = min_y;
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if (height > max_height)
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height = max_height;
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}
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void tooltip_update()
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{
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if (!g_tooltip.tooltip_text) {
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tooltip_hide(0);
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return;
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}
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tooltip_update_geometry();
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if (just_shown) {
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if (!panel_horizontal)
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y -= height / 2; // center vertically
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just_shown = FALSE;
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}
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tooltip_adjust_geometry();
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XMoveResizeWindow(server.display, g_tooltip.window, x, y, width, height);
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// Stuff for drawing the tooltip
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cairo_surface_t *cs = cairo_xlib_surface_create(server.display, g_tooltip.window, server.visual, width, height);
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cairo_t *c = cairo_create(cs);
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Color bc = g_tooltip.bg->fill_color;
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Border b = g_tooltip.bg->border;
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if (server.real_transparency) {
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clear_pixmap(g_tooltip.window, 0, 0, width, height);
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draw_rect(c, b.width, b.width, width - 2 * b.width, height - 2 * b.width, b.radius - b.width / 1.571);
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cairo_set_source_rgba(c, bc.rgb[0], bc.rgb[1], bc.rgb[2], bc.alpha);
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} else {
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cairo_rectangle(c, 0., 0, width, height);
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cairo_set_source_rgb(c, bc.rgb[0], bc.rgb[1], bc.rgb[2]);
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}
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cairo_fill(c);
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cairo_set_line_width(c, b.width);
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if (server.real_transparency)
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draw_rect(c, b.width / 2.0, b.width / 2.0, width - b.width, height - b.width, b.radius);
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else
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cairo_rectangle(c, b.width / 2.0, b.width / 2.0, width - b.width, height - b.width);
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cairo_set_source_rgba(c, b.color.rgb[0], b.color.rgb[1], b.color.rgb[2], b.color.alpha);
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cairo_stroke(c);
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Color fc = g_tooltip.font_color;
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cairo_set_source_rgba(c, fc.rgb[0], fc.rgb[1], fc.rgb[2], fc.alpha);
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PangoLayout *layout = pango_cairo_create_layout(c);
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pango_layout_set_font_description(layout, g_tooltip.font_desc);
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pango_layout_set_wrap(layout, PANGO_WRAP_WORD);
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pango_layout_set_text(layout, g_tooltip.tooltip_text, -1);
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PangoRectangle r1, r2;
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pango_layout_get_pixel_extents(layout, &r1, &r2);
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pango_layout_set_width(layout, width * PANGO_SCALE);
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pango_layout_set_height(layout, height * PANGO_SCALE);
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pango_layout_set_ellipsize(layout, PANGO_ELLIPSIZE_END);
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// I do not know why this is the right way, but with the below cairo_move_to it seems to be centered (horiz. and
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// vert.)
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cairo_move_to(c,
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-r1.x / 2 + left_bg_border_width(g_tooltip.bg) + g_tooltip.paddingx,
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-r1.y / 2 + 1 + top_bg_border_width(g_tooltip.bg) + g_tooltip.paddingy);
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pango_cairo_show_layout(c, layout);
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g_object_unref(layout);
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if (g_tooltip.image) {
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cairo_translate(c,
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g_tooltip.paddingx,
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height - g_tooltip.paddingy - cairo_image_surface_get_height(g_tooltip.image));
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cairo_set_source_surface(c, g_tooltip.image, 0, 0);
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cairo_paint(c);
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}
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cairo_destroy(c);
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cairo_surface_destroy(cs);
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}
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void tooltip_trigger_hide()
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{
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if (g_tooltip.mapped) {
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tooltip_update_contents_for(NULL);
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start_hide_timeout();
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} else {
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// tooltip not visible yet, but maybe a timeout is still pending
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stop_tooltip_timeout();
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}
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}
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void tooltip_hide(void *arg)
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{
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if (g_tooltip.mapped) {
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g_tooltip.mapped = False;
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XUnmapWindow(server.display, g_tooltip.window);
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XFlush(server.display);
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}
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}
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void start_show_timeout()
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{
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change_timeout(&g_tooltip.timeout, g_tooltip.show_timeout_msec, 0, tooltip_show, 0);
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}
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void start_hide_timeout()
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{
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change_timeout(&g_tooltip.timeout, g_tooltip.hide_timeout_msec, 0, tooltip_hide, 0);
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}
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void stop_tooltip_timeout()
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{
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stop_timeout(g_tooltip.timeout);
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}
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void tooltip_update_contents_for(Area *area)
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{
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free_and_null(g_tooltip.tooltip_text);
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if (g_tooltip.image)
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cairo_surface_destroy(g_tooltip.image);
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g_tooltip.image = NULL;
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if (area && area->_get_tooltip_text)
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g_tooltip.tooltip_text = area->_get_tooltip_text(area);
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if (area && area->_get_tooltip_image) {
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g_tooltip.image = area->_get_tooltip_image(area);
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if (g_tooltip.image)
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cairo_surface_reference(g_tooltip.image);
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}
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g_tooltip.area = area;
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}
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