/**************************************************************************
*
* Tint2 : task
*
* Copyright (C) 2007 Pål Staurland (staura@gmail.com)
* Modified (C) 2008 thierry lorthiois (lorthiois@bbsoft.fr)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
**************************************************************************/

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <glib.h>
#include <Imlib2.h>

#include "window.h"
#include "task.h"
#include "server.h"
#include "panel.h"



Task *add_task (Window win)
{
	if (!win) return 0;
	if (window_is_hidden(win)) return 0;

	int monitor;

	Task new_tsk;
	new_tsk.win = win;
	new_tsk.area.panel = &panel1[0];
	new_tsk.desktop = window_get_desktop (win);
	if (nb_panel > 1) monitor = window_get_monitor (win);
	else monitor = 0;

	// allocate only one title and one icon
	// even with task_on_all_desktop and with task_on_all_panel
	new_tsk.title = 0;
	new_tsk.icon_data = 0;
	get_title(&new_tsk);
	get_icon(&new_tsk);

	//printf("task %s : desktop %d, monitor %d\n", new_tsk->title, desktop, monitor);
	XSelectInput (server.dsp, new_tsk.win, PropertyChangeMask|StructureNotifyMask);

	Taskbar *tskbar;
	Task *new_tsk2=0;
	int i, j;
	for (i=0 ; i < nb_panel ; i++) {
		for (j=0 ; j < panel1[i].nb_desktop ; j++) {
			if (new_tsk.desktop != ALLDESKTOP && new_tsk.desktop != j) continue;
			if (nb_panel > 1 && panel1[i].monitor != monitor) continue;

			tskbar = &panel1[i].taskbar[j];
			new_tsk2 = malloc(sizeof(Task));
			memcpy(&new_tsk2->area, &panel1[i].g_task.area, sizeof(Area));
			new_tsk2->area.parent = tskbar;
			new_tsk2->win = new_tsk.win;
			new_tsk2->desktop = new_tsk.desktop;
			new_tsk2->title = new_tsk.title;
			new_tsk2->icon_data = new_tsk.icon_data;
			new_tsk2->icon_width = new_tsk.icon_width;
			new_tsk2->icon_height = new_tsk.icon_height;
			tskbar->area.list = g_slist_append(tskbar->area.list, new_tsk2);
			tskbar->area.resize = 1;
			//printf("add_task panel %d, desktop %d, task %s\n", i, j, new_tsk2->title);
		}
	}
	return new_tsk2;
}


void remove_task (Task *tsk)
{
	if (!tsk) return;

	Window win = tsk->win;
	int desktop = tsk->desktop;

	// free title and icon just for the first task
	// even with task_on_all_desktop and with task_on_all_panel
	//printf("remove_task %s %d\n", tsk->title, tsk->desktop);
	if (tsk->title)
		free (tsk->title);
	if (tsk->icon_data)
		free (tsk->icon_data);

	int i, j;
	Task *tsk2;
	Taskbar *tskbar;
	for (i=0 ; i < nb_panel ; i++) {
		for (j=0 ; j < panel1[i].nb_desktop ; j++) {
			if (desktop != ALLDESKTOP && desktop != j) continue;

			GSList *l0;
			tskbar = &panel1[i].taskbar[j];
			for (l0 = tskbar->area.list; l0 ; ) {
				tsk2 = l0->data;
				l0 = l0->next;
				if (win == tsk2->win) {
					tskbar->area.list = g_slist_remove(tskbar->area.list, tsk2);
					tskbar->area.resize = 1;

					if (tsk2 == task_active)
						task_active = 0;
					if (tsk2 == task_drag)
						task_drag = 0;

					XFreePixmap (server.dsp, tsk2->area.pix.pmap);
					XFreePixmap (server.dsp, tsk2->area.pix_active.pmap);
					free(tsk2);
				}
			}
		}
	}
}


void get_title(Task *tsk)
{
	Panel *panel = tsk->area.panel;
	char *title, *name;

	if (!panel->g_task.text) return;

	name = server_get_property (tsk->win, server.atom._NET_WM_VISIBLE_NAME, server.atom.UTF8_STRING, 0);
	if (!name || !strlen(name)) {
		name = server_get_property (tsk->win, server.atom._NET_WM_NAME, server.atom.UTF8_STRING, 0);
		if (!name || !strlen(name)) {
			name = server_get_property (tsk->win, server.atom.WM_NAME, XA_STRING, 0);
			if (!name || !strlen(name)) {
				name = malloc(10);
				strcpy(name, "Untitled");
			}
		}
	}

	// add space before title
	title = malloc(strlen(name)+2);
	if (panel->g_task.icon) strcpy(title, " ");
	else title[0] = 0;
	strcat(title, name);
	if (name) XFree (name);

	tsk->area.redraw = 1;
	if (tsk->title)
		free(tsk->title);
	tsk->title = title;
}


void get_icon (Task *tsk)
{
	Panel *panel = tsk->area.panel;
	if (!panel->g_task.icon) return;

	if (tsk->icon_data) {
		free (tsk->icon_data);
		tsk->icon_data = 0;
	}
	tsk->area.redraw = 1;

	long *data;
	int num;
	data = server_get_property (tsk->win, server.atom._NET_WM_ICON, XA_CARDINAL, &num);
	if (data) {
		// get ARGB icon
		int w, h;
		long *tmp_data;
		tmp_data = get_best_icon (data, get_icon_count (data, num), num, &w, &h, panel->g_task.icon_size1);

		tsk->icon_width = w;
		tsk->icon_height = h;
		// DATA32 is provided by imlib2
		tsk->icon_data = malloc (w * h * sizeof (DATA32));

#ifdef __x86_64__
		int length = tsk->icon_width * tsk->icon_height;
		int i;
		for (i = 0; i < length; ++i)
			tsk->icon_data[i] =  tmp_data[i];
#else
		memcpy (tsk->icon_data, tmp_data, w * h * sizeof (DATA32));
#endif

		XFree (data);
   }
   else {
      // get Pixmap icon
      XWMHints *hints = XGetWMHints(server.dsp, tsk->win);
      if (hints) {
         if (hints->flags & IconPixmapHint && hints->icon_pixmap != 0) {
         	// get width, height and depth for the pixmap
				Window root;
				int  icon_x, icon_y;
				uint border_width, bpp;
				uint icon_width, icon_height;

				XGetGeometry(server.dsp, hints->icon_pixmap, &root, &icon_x, &icon_y, &icon_width, &icon_height, &border_width, &bpp);

		      //printf("  get_pixmap\n");
		      Imlib_Image  img;
				imlib_context_set_drawable(hints->icon_pixmap);
				img = imlib_create_image_from_drawable(hints->icon_mask, 0, 0, icon_width, icon_height, 0);
				imlib_context_set_image(img);
				unsigned int *data = imlib_image_get_data();
				if (!data) {
					return;
				}
				tsk->icon_width = imlib_image_get_width();
				tsk->icon_height = imlib_image_get_height();
				tsk->icon_data = malloc (tsk->icon_width * tsk->icon_height * sizeof (DATA32));
				memcpy (tsk->icon_data, data, tsk->icon_width * tsk->icon_height * sizeof (DATA32));
				imlib_free_image();
			}
         XFree(hints);
		}
   }
}


void draw_task_icon (Task *tsk, int text_width, int active)
{
	if (tsk->icon_data == 0) return;

	Pixmap *pmap = (active == 0) ? (&tsk->area.pix.pmap) : (&tsk->area.pix_active.pmap);

	/* Find pos */
	int pos_x;
	Panel *panel = (Panel*)tsk->area.panel;
	if (panel->g_task.centered) {
		if (panel->g_task.text)
			pos_x = (tsk->area.width - text_width - panel->g_task.icon_size1) / 2;
		else
			pos_x = (tsk->area.width - panel->g_task.icon_size1) / 2;
	}
	else pos_x = panel->g_task.area.paddingxlr + panel->g_task.area.pix.border.width;

	/* Render */
	Imlib_Image icon;
	Imlib_Color_Modifier cmod;
	DATA8 red[256], green[256], blue[256], alpha[256];

	icon = imlib_create_image_using_data (tsk->icon_width, tsk->icon_height, tsk->icon_data);
	imlib_context_set_image (icon);
	imlib_context_set_drawable (*pmap);

	cmod = imlib_create_color_modifier ();
	imlib_context_set_color_modifier (cmod);
	imlib_image_set_has_alpha (1);
	imlib_get_color_modifier_tables (red, green, blue, alpha);

	int i, opacity;
	opacity = (active == 0) ? (255*panel->g_task.font.alpha) : (255*panel->g_task.font_active.alpha);
	for (i = 127; i < 256; i++) alpha[i] = opacity;

	imlib_set_color_modifier_tables (red, green, blue, alpha);

	//imlib_render_image_on_drawable (pos_x, pos_y);
	imlib_render_image_on_drawable_at_size (pos_x, panel->g_task.icon_posy, panel->g_task.icon_size1, panel->g_task.icon_size1);

	imlib_free_color_modifier ();
	imlib_free_image ();
}


void draw_task (void *obj, cairo_t *c, int active)
{
	Task *tsk = obj;
	PangoLayout *layout;
	config_color *config_text;
	int width=0, height;
	Panel *panel = (Panel*)tsk->area.panel;

	if (panel->g_task.text) {
		/* Layout */
		layout = pango_cairo_create_layout (c);
		pango_layout_set_font_description (layout, panel->g_task.font_desc);
		pango_layout_set_text (layout, tsk->title, -1);

		/* Drawing width and Cut text */
		// pango use U+22EF or U+2026
		pango_layout_set_width (layout, ((Taskbar*)tsk->area.parent)->text_width * PANGO_SCALE);
		pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_END);

		/* Center text */
		if (panel->g_task.centered) pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER);
		else pango_layout_set_alignment (layout, PANGO_ALIGN_LEFT);

		pango_layout_get_pixel_size (layout, &width, &height);

		if (active) config_text = &panel->g_task.font_active;
		else config_text = &panel->g_task.font;

		cairo_set_source_rgba (c, config_text->color[0], config_text->color[1], config_text->color[2], config_text->alpha);

		pango_cairo_update_layout (c, layout);
		cairo_move_to (c, panel->g_task.text_posx, panel->g_task.text_posy);
		pango_cairo_show_layout (c, layout);

		if (panel->g_task.font_shadow) {
			cairo_set_source_rgba (c, 0.0, 0.0, 0.0, 0.5);
			pango_cairo_update_layout (c, layout);
			cairo_move_to (c, panel->g_task.text_posx + 1, panel->g_task.text_posy + 1);
			pango_cairo_show_layout (c, layout);
		}
		g_object_unref (layout);
	}

	if (panel->g_task.icon) {
		// icon use same opacity as text
		draw_task_icon (tsk, width, active);
	}
}