Fix for incorrect task cycling when windows visible on all desktops are present

[chaz/tint2] / src / taskbar / task.c

/**************************************************************************
*
* Tint2 : task
*
* Copyright (C) 2007 Pål Staurland (staura@gmail.com)
* Modified (C) 2008 thierry lorthiois (lorthiois@bbsoft.fr) from Omega distribution
*
* 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 <unistd.h>

#include "window.h"
#include "task.h"
#include "taskbar.h"
#include "server.h"
#include "panel.h"
#include "tooltip.h"
#include "timer.h"

timeout* urgent_timeout;
GSList* urgent_list;

const char* task_get_tooltip(void* obj)
{
        Task* t = obj;
        return t->title;
}


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

        int monitor;
        if (nb_panel > 1) {
                monitor = window_get_monitor (win);
                if (monitor >= nb_panel) monitor = 0;
        }
        else monitor = 0;

        Task new_tsk;
        new_tsk.win = win;
        new_tsk.desktop = window_get_desktop (win);
        new_tsk.area.panel = &panel1[monitor];
        new_tsk.current_state = window_is_iconified(win) ? TASK_ICONIFIED : TASK_NORMAL;

        // allocate only one title and one icon
        // even with task_on_all_desktop and with task_on_all_panel
        new_tsk.title = 0;
        int k;
        for (k=0; k<TASK_STATE_COUNT; ++k) {
                new_tsk.icon[k] = 0;
                new_tsk.state_pix[k] = 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);

        GPtrArray* task_group = g_ptr_array_new();
        Taskbar *tskbar;
        Task *new_tsk2=0;
        int j;
        for (j=0 ; j < panel1[monitor].nb_desktop ; j++) {
                if (new_tsk.desktop != ALLDESKTOP && new_tsk.desktop != j) continue;

                tskbar = &panel1[monitor].taskbar[j];
                new_tsk2 = malloc(sizeof(Task));
                memcpy(&new_tsk2->area, &panel1[monitor].g_task.area, sizeof(Area));
                new_tsk2->area.parent = tskbar;
                new_tsk2->win = new_tsk.win;
                new_tsk2->desktop = new_tsk.desktop;
                new_tsk2->current_state = -1;  // to update the current state later in set_task_state...
                if (new_tsk2->desktop == ALLDESKTOP && server.desktop != j) {
                        // hide ALLDESKTOP task on non-current desktop
                        new_tsk2->area.on_screen = 0;
                }
                new_tsk2->title = new_tsk.title;
                if (panel1[monitor].g_task.tooltip_enabled)
                        new_tsk2->area._get_tooltip_text = task_get_tooltip;
                for (k=0; k<TASK_STATE_COUNT; ++k) {
                        new_tsk2->icon[k] = new_tsk.icon[k];
                        new_tsk2->state_pix[k] = 0;
                }
                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;
                g_ptr_array_add(task_group, new_tsk2);
                //printf("add_task panel %d, desktop %d, task %s\n", i, j, new_tsk2->title);
        }
        Window* key = malloc(sizeof(Window));
        *key = new_tsk.win;
        g_hash_table_insert(win_to_task_table, key, task_group);
        set_task_state(new_tsk2, new_tsk.current_state);

        if (window_is_urgent(win))
                add_urgent(new_tsk2);

        return new_tsk2;
}


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

        Window win = tsk->win;

        // 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);
        int k;
        for (k=0; k<TASK_STATE_COUNT; ++k) {
                if (tsk->icon[k]) {
                        imlib_context_set_image(tsk->icon[k]);
                        imlib_free_image();
                        tsk->icon[k] = 0;
                        if (tsk->state_pix[k]) XFreePixmap(server.dsp, tsk->state_pix[k]);
                }
        }

        int i;
        Task *tsk2;
        Taskbar *tskbar;
        GPtrArray* task_group = g_hash_table_lookup(win_to_task_table, &win);
        for (i=0; i<task_group->len; ++i) {
                tsk2 = g_ptr_array_index(task_group, i);
                tskbar = tsk2->area.parent;
                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;
                if (g_slist_find(urgent_list, tsk2)) del_urgent(tsk2);
                free(tsk2);
        }
        g_hash_table_remove(win_to_task_table, &win);
}


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

        if (!panel->g_task.text && !panel->g_task.tooltip_enabled) return 0;

        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);
        
        if (tsk->title) {
                // check unecessary title change
                if (strcmp(tsk->title, title) == 0) {
                        free(title);
                        return 0;
                }
                else
                        free(tsk->title);
        } 

        tsk->title = title;
        GPtrArray* task_group = task_get_tasks(tsk->win);
        if (task_group) {
                int i;
                for (i=0; i<task_group->len; ++i) {
                        Task* tsk2 = g_ptr_array_index(task_group, i);
                        tsk2->title = tsk->title;
                        set_task_redraw(tsk2);
                }
        }
        return 1;
}


void get_icon (Task *tsk)
{
        Panel *panel = tsk->area.panel;
        if (!panel->g_task.icon) return;
        int i;
        Imlib_Image img = NULL;
        XWMHints *hints = 0;
        gulong *data = 0;

        int k;
        for (k=0; k<TASK_STATE_COUNT; ++k) {
                if (tsk->icon[k]) {
                        imlib_context_set_image(tsk->icon[k]);
                        imlib_free_image();
                        tsk->icon[k] = 0;
                }
        }

        data = server_get_property (tsk->win, server.atom._NET_WM_ICON, XA_CARDINAL, &i);
        if (data) {
                // get ARGB icon
                int w, h;
                gulong *tmp_data;

                tmp_data = get_best_icon (data, get_icon_count (data, i), i, &w, &h, panel->g_task.icon_size1);
#ifdef __x86_64__
                DATA32 icon_data[w * h];
                int length = w * h;
                for (i = 0; i < length; ++i)
                        icon_data[i] =  tmp_data[i];
                img = imlib_create_image_using_copied_data (w, h, icon_data);
#else
                img = imlib_create_image_using_data (w, h, (DATA32*)tmp_data);
#endif
        }
        else {
                // get Pixmap icon
                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 w, h;

                                //printf("  get pixmap\n");
                                XGetGeometry(server.dsp, hints->icon_pixmap, &root, &icon_x, &icon_y, &w, &h, &border_width, &bpp);
                                imlib_context_set_drawable(hints->icon_pixmap);
                                img = imlib_create_image_from_drawable(hints->icon_mask, 0, 0, w, h, 0);
                        }
                }
        }
        if (img == NULL) {
                imlib_context_set_image(default_icon);
                img = imlib_clone_image();
        }

        // transform icons
        imlib_context_set_image(img);
        imlib_image_set_has_alpha(1);
        int w, h;
        w = imlib_image_get_width();
        h = imlib_image_get_height();
        Imlib_Image orig_image = imlib_create_cropped_scaled_image(0, 0, w, h, panel->g_task.icon_size1, panel->g_task.icon_size1);
        imlib_free_image();

        imlib_context_set_image(orig_image);
        tsk->icon_width = imlib_image_get_width();
        tsk->icon_height = imlib_image_get_height();
        for (k=0; k<TASK_STATE_COUNT; ++k) {
                imlib_context_set_image(orig_image);
                tsk->icon[k] = imlib_clone_image();
                imlib_context_set_image(tsk->icon[k]);
                DATA32 *data32;
                if (panel->g_task.alpha[k] != 100 || panel->g_task.saturation[k] != 0 || panel->g_task.brightness[k] != 0) {
                        data32 = imlib_image_get_data();
                        adjust_asb(data32, tsk->icon_width, tsk->icon_height, panel->g_task.alpha[k], (float)panel->g_task.saturation[k]/100, (float)panel->g_task.brightness[k]/100);
                        imlib_image_put_back_data(data32);
                }
        }
        imlib_context_set_image(orig_image);
        imlib_free_image();

        if (hints)
                XFree(hints);
        if (data)
                XFree (data);

        GPtrArray* task_group = task_get_tasks(tsk->win);
        if (task_group) {
                for (i=0; i<task_group->len; ++i) {
                        Task* tsk2 = g_ptr_array_index(task_group, i);
                        tsk2->icon_width = tsk->icon_width;
                        tsk2->icon_height = tsk->icon_height;
                        int k;
                        for (k=0; k<TASK_STATE_COUNT; ++k)
                                tsk2->icon[k] = tsk->icon[k];
                        set_task_redraw(tsk2);
                }
        }
}


void draw_task_icon (Task *tsk, int text_width)
{
        if (tsk->icon[tsk->current_state] == 0) return;

        // 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 + tsk->area.bg->border.width;

        // Render
        imlib_context_set_image (tsk->icon[tsk->current_state]);
        if (server.real_transparency) {
                render_image(tsk->area.pix, pos_x, panel->g_task.icon_posy, imlib_image_get_width(), imlib_image_get_height() );
        }
        else {
                imlib_context_set_drawable(tsk->area.pix);
                imlib_render_image_on_drawable (pos_x, panel->g_task.icon_posy);
        }
}


void draw_task (void *obj, cairo_t *c)
{
        Task *tsk = obj;
        tsk->state_pix[tsk->current_state] = tsk->area.pix;
        PangoLayout *layout;
        Color *config_text;
        int width=0, height;
        Panel *panel = (Panel*)tsk->area.panel;
        //printf("draw_task %d %d\n", tsk->area.posx, tsk->area.posy);

        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_height(layout, panel->g_task.text_height * PANGO_SCALE);
                pango_layout_set_wrap(layout, PANGO_WRAP_CHAR);
                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);

                config_text = &panel->g_task.font[tsk->current_state];
                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);
                double text_posy = (panel->g_task.area.height - height) / 2.0;
                cairo_move_to (c, panel->g_task.text_posx, 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, text_posy + 1);
                        pango_cairo_show_layout (c, layout);
                }
                g_object_unref (layout);
        }

        if (panel->g_task.icon) {
                draw_task_icon (tsk, width);
        }
}


void on_change_task (void *obj)
{
        Task *tsk = obj;
        Panel *panel = (Panel*)tsk->area.panel;

        long value[] = { panel->posx+tsk->area.posx, panel->posy+tsk->area.posy, tsk->area.width, tsk->area.height };
        XChangeProperty (server.dsp, tsk->win, server.atom._NET_WM_ICON_GEOMETRY, XA_CARDINAL, 32, PropModeReplace, (unsigned char*)value, 4);
        
        // reset Pixmap when position/size changed
        set_task_redraw(tsk);
}

// Given a pointer to the active task (active_task) and a pointer
// to the task that is currently under the mouse (current_task),
// return a pointer to the active task that is on the same desktop
// as current_task. Normally this is simply active_task, except when
// it is set to appear on all desktops. In that case we search for
// another Task on current_task's taskbar, with the same window as
// active_task.
Task *find_active_task(Task *current_task, Task *active_task)
{
        if (active_task == 0)
                return current_task;
        if (active_task->desktop != ALLDESKTOP)
                return active_task;
        if (current_task == 0)
                return active_task;

        GSList *l0;
        Task *tsk;
        Taskbar* tskbar = current_task->area.parent;

        l0 = tskbar->area.list;
        if (taskbarname_enabled) l0 = l0->next;
        for (; l0 ; l0 = l0->next) {
                tsk = l0->data;
                if (tsk->win == active_task->win)
                        return tsk;
        }
        return active_task;
}

Task *next_task(Task *tsk)
{
        if (tsk == 0)
                return 0;

        GSList *l0, *lfirst_tsk;
        Task *tsk1;
        Taskbar* tskbar = tsk->area.parent;

        l0 = tskbar->area.list;
        if (taskbarname_enabled) l0 = l0->next;
        lfirst_tsk = l0;
        for (; l0 ; l0 = l0->next) {
                tsk1 = l0->data;
                if (tsk1 == tsk) {
                        if (l0->next == 0) l0 = lfirst_tsk;
                        else l0 = l0->next;
                        return l0->data;
                }
        }

        return 0;
}

Task *prev_task(Task *tsk)
{
        if (tsk == 0)
                return 0;

        GSList *l0, *lfirst_tsk;
        Task *tsk1, *tsk2;
        Taskbar* tskbar = tsk->area.parent;

        tsk2 = 0;
        l0 = tskbar->area.list;
        if (taskbarname_enabled) l0 = l0->next;
        lfirst_tsk = l0;
        for (; l0 ; l0 = l0->next) {
                tsk1 = l0->data;
                if (tsk1 == tsk) {
                        if (l0 == lfirst_tsk) {
                                l0 = g_slist_last ( l0 );
                                tsk2 = l0->data;
                        }
                        return tsk2;
                }
                tsk2 = tsk1;
        }

        return 0;
}


void active_task()
{
        if (task_active) {
                set_task_state(task_active, window_is_iconified(task_active->win) ? TASK_ICONIFIED : TASK_NORMAL);
                task_active = 0;
        }

        Window w1 = window_get_active();
        //printf("Change active task %ld\n", w1);

        if (w1) {
                if (!task_get_tasks(w1)) {
                        Window w2;
                        while (XGetTransientForHint(server.dsp, w1, &w2))
                                w1 = w2;
                }
                set_task_state((task_active = task_get_task(w1)), TASK_ACTIVE);
        }
}


void set_task_state(Task *tsk, int state)
{
        if (tsk == 0 || state < 0 || state >= TASK_STATE_COUNT)
                return;

        if (tsk->current_state != state) {
                GPtrArray* task_group = task_get_tasks(tsk->win);
                if (task_group) {
                        int i;
                        for (i=0; i<task_group->len; ++i) {
                                Task* tsk1 = g_ptr_array_index(task_group, i);
                                tsk1->current_state = state;
                                tsk1->area.bg = panel1[0].g_task.background[state];
                                tsk1->area.pix = tsk1->state_pix[state];
                                if (tsk1->state_pix[state] == 0)
                                        tsk1->area.redraw = 1;
                                if (state == TASK_ACTIVE && g_slist_find(urgent_list, tsk1))
                                        del_urgent(tsk1);
                        }
                        panel_refresh = 1;
                }
        }
}


void set_task_redraw(Task* tsk)
{
        int k;
        for (k=0; k<TASK_STATE_COUNT; ++k) {
                if (tsk->state_pix[k]) XFreePixmap(server.dsp, tsk->state_pix[k]);
                tsk->state_pix[k] = 0;
        }
        tsk->area.pix = 0;
        tsk->area.redraw = 1;
}


void blink_urgent(void* arg)
{
        GSList* urgent_task = urgent_list;
        while (urgent_task) {
                Task* t = urgent_task->data;
                if ( t->urgent_tick < max_tick_urgent) {
                        if (t->urgent_tick++ % 2)
                                set_task_state(t, TASK_URGENT);
                        else
                                set_task_state(t, window_is_iconified(t->win) ? TASK_ICONIFIED : TASK_NORMAL);
                }
                urgent_task = urgent_task->next;
        }
        panel_refresh = 1;
}


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

        // some programs set urgency hint although they are active
        if ( task_active && task_active->win == tsk->win )
                return;

        tsk = task_get_task(tsk->win);  // always add the first tsk for a task group (omnipresent windows)
        tsk->urgent_tick = 0;
        if (g_slist_find(urgent_list, tsk))
                return;

        // not yet in the list, so we have to add it
        urgent_list = g_slist_prepend(urgent_list, tsk);

        if (urgent_timeout == 0)
                urgent_timeout = add_timeout(10, 1000, blink_urgent, 0);
}


void del_urgent(Task *tsk)
{
        urgent_list = g_slist_remove(urgent_list, tsk);
        if (urgent_list == 0) {
                stop_timeout(urgent_timeout);
                urgent_timeout = 0;
        }
}