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src/click.c

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00001 /*
00002  * vim:ts=8:expandtab
00003  *
00004  * i3 - an improved dynamic tiling window manager
00005  *
00006  * © 2009-2010 Michael Stapelberg and contributors
00007  *
00008  * See file LICENSE for license information.
00009  *
00010  * src/click.c: Contains the handlers for button press (mouse click) events
00011  *              because they are quite large.
00012  *
00013  */
00014 #include <stdio.h>
00015 #include <assert.h>
00016 #include <string.h>
00017 #include <stdlib.h>
00018 #include <time.h>
00019 #include <stdbool.h>
00020 #include <math.h>
00021 
00022 #include <xcb/xcb.h>
00023 #include <xcb/xcb_atom.h>
00024 #include <xcb/xcb_icccm.h>
00025 
00026 #include <X11/XKBlib.h>
00027 
00028 #include "i3.h"
00029 #include "queue.h"
00030 #include "table.h"
00031 #include "config.h"
00032 #include "util.h"
00033 #include "xcb.h"
00034 #include "client.h"
00035 #include "workspace.h"
00036 #include "commands.h"
00037 #include "floating.h"
00038 #include "resize.h"
00039 #include "log.h"
00040 #include "randr.h"
00041 
00042 static struct Stack_Window *get_stack_window(xcb_window_t window_id) {
00043         struct Stack_Window *current;
00044 
00045         SLIST_FOREACH(current, &stack_wins, stack_windows) {
00046                 if (current->window != window_id)
00047                         continue;
00048 
00049                 return current;
00050         }
00051 
00052         return NULL;
00053 }
00054 
00055 /*
00056  * Checks if the button press was on a stack window, handles focus setting and returns true
00057  * if so, or false otherwise.
00058  *
00059  */
00060 static bool button_press_stackwin(xcb_connection_t *conn, xcb_button_press_event_t *event) {
00061         struct Stack_Window *stack_win;
00062 
00063         /* If we find a corresponding stack window, we can handle the event */
00064         if ((stack_win = get_stack_window(event->event)) == NULL)
00065                 return false;
00066 
00067         /* A stack window was clicked, we check if it was button4 or button5
00068            which are scroll up / scroll down. */
00069         if (event->detail == XCB_BUTTON_INDEX_4 || event->detail == XCB_BUTTON_INDEX_5) {
00070                 direction_t direction = (event->detail == XCB_BUTTON_INDEX_4 ? D_UP : D_DOWN);
00071                 focus_window_in_container(conn, CUR_CELL, direction);
00072                 return true;
00073         }
00074 
00075         /* It was no scrolling, so we calculate the destination client by
00076            dividing the Y position of the event through the height of a window
00077            decoration and then set the focus to this client. */
00078         i3Font *font = load_font(conn, config.font);
00079         int decoration_height = (font->height + 2 + 2);
00080         int destination = (event->event_y / decoration_height),
00081             c = 0,
00082             num_clients = 0;
00083         Client *client;
00084         Container *container = stack_win->container;
00085 
00086         CIRCLEQ_FOREACH(client, &(container->clients), clients)
00087                 num_clients++;
00088 
00089         /* If we don’t have any clients in this container, we cannot do
00090          * anything useful anyways. */
00091         if (num_clients == 0)
00092                 return true;
00093 
00094         if (container->mode == MODE_TABBED)
00095                 destination = (event->event_x / (container->width / num_clients));
00096         else if (container->mode == MODE_STACK &&
00097                  container->stack_limit != STACK_LIMIT_NONE) {
00098                 if (container->stack_limit == STACK_LIMIT_COLS) {
00099                         int wrap = ceil((float)num_clients / container->stack_limit_value);
00100                         int clicked_column = (event->event_x / (stack_win->rect.width / container->stack_limit_value));
00101                         int clicked_row = (event->event_y / decoration_height);
00102                         DLOG("clicked on column %d, row %d\n", clicked_column, clicked_row);
00103                         destination = (wrap * clicked_column) + clicked_row;
00104                 } else {
00105                         int width = (stack_win->rect.width / ceil((float)num_clients / container->stack_limit_value));
00106                         int clicked_column = (event->event_x / width);
00107                         int clicked_row = (event->event_y / decoration_height);
00108                         DLOG("clicked on column %d, row %d\n", clicked_column, clicked_row);
00109                         destination = (container->stack_limit_value * clicked_column) + clicked_row;
00110                 }
00111         }
00112 
00113         DLOG("Click on stack_win for client %d\n", destination);
00114         CIRCLEQ_FOREACH(client, &(stack_win->container->clients), clients)
00115                 if (c++ == destination) {
00116                         set_focus(conn, client, true);
00117                         return true;
00118                 }
00119 
00120         return true;
00121 }
00122 
00123 /*
00124  * Checks if the button press was on a bar, switches to the workspace and returns true
00125  * if so, or false otherwise.
00126  *
00127  */
00128 static bool button_press_bar(xcb_connection_t *conn, xcb_button_press_event_t *event) {
00129         Output *output;
00130         TAILQ_FOREACH(output, &outputs, outputs) {
00131                 if (output->bar != event->event)
00132                         continue;
00133 
00134                 DLOG("Click on a bar\n");
00135 
00136                 /* Check if the button was one of button4 or button5 (scroll up / scroll down) */
00137                 if (event->detail == XCB_BUTTON_INDEX_4 || event->detail == XCB_BUTTON_INDEX_5) {
00138                         Workspace *ws = c_ws;
00139                         if (event->detail == XCB_BUTTON_INDEX_5) {
00140                                 while ((ws = TAILQ_NEXT(ws, workspaces)) != TAILQ_END(workspaces_head)) {
00141                                         if (ws->output == output) {
00142                                                 workspace_show(conn, ws->num + 1);
00143                                                 return true;
00144                                         }
00145                                 }
00146                         } else {
00147                                 while ((ws = TAILQ_PREV(ws, workspaces_head, workspaces)) != TAILQ_END(workspaces)) {
00148                                         if (ws->output == output) {
00149                                                 workspace_show(conn, ws->num + 1);
00150                                                 return true;
00151                                         }
00152                                 }
00153                         }
00154                         return true;
00155                 }
00156                 int drawn = 0;
00157                 /* Because workspaces can be on different outputs, we need to loop
00158                    through all of them and decide to count it based on its ->output */
00159                 Workspace *ws;
00160                 TAILQ_FOREACH(ws, workspaces, workspaces) {
00161                         if (ws->output != output)
00162                                 continue;
00163                         DLOG("Checking if click was on workspace %d with drawn = %d, tw = %d\n",
00164                                         ws->num, drawn, ws->text_width);
00165                         if (event->event_x > (drawn + 1) &&
00166                             event->event_x <= (drawn + 1 + ws->text_width + 5 + 5)) {
00167                                 workspace_show(conn, ws->num + 1);
00168                                 return true;
00169                         }
00170 
00171                         drawn += ws->text_width + 5 + 5 + 2;
00172                 }
00173                 return true;
00174         }
00175 
00176         return false;
00177 }
00178 
00179 /*
00180  * Called when the user clicks using the floating_modifier, but the client is in
00181  * tiling layout.
00182  *
00183  * Returns false if it does not do anything (that is, the click should be sent
00184  * to the client).
00185  *
00186  */
00187 static bool floating_mod_on_tiled_client(xcb_connection_t *conn, Client *client,
00188                                          xcb_button_press_event_t *event) {
00189         /* Only the right mouse button is interesting for us at the moment */
00190         if (event->detail != 3)
00191                 return false;
00192 
00193         /* The client is in tiling layout. We can still
00194          * initiate a resize with the right mouse button,
00195          * by chosing the border which is the most near one
00196          * to the position of the mouse pointer */
00197         int to_right = client->rect.width - event->event_x,
00198             to_left = event->event_x,
00199             to_top = event->event_y,
00200             to_bottom = client->rect.height - event->event_y;
00201         resize_orientation_t orientation = O_VERTICAL;
00202         Container *con = client->container;
00203         Workspace *ws = con->workspace;
00204         int first = 0, second = 0;
00205 
00206         DLOG("click was %d px to the right, %d px to the left, %d px to top, %d px to bottom\n",
00207                         to_right, to_left, to_top, to_bottom);
00208 
00209         if (to_right < to_left &&
00210             to_right < to_top &&
00211             to_right < to_bottom) {
00212                 /* …right border */
00213                 first = con->col + (con->colspan - 1);
00214                 DLOG("column %d\n", first);
00215 
00216                 if (!cell_exists(ws, first, con->row) ||
00217                     (first == (ws->cols-1)))
00218                         return false;
00219 
00220                 second = first + 1;
00221         } else if (to_left < to_right &&
00222                    to_left < to_top &&
00223                    to_left < to_bottom) {
00224                 /* …left border */
00225                 if (con->col == 0)
00226                         return false;
00227 
00228                 first = con->col - 1;
00229                 second = con->col;
00230         } else if (to_top < to_right &&
00231                    to_top < to_left &&
00232                    to_top < to_bottom) {
00233                 /* This was a press on the top border */
00234                 if (con->row == 0)
00235                         return false;
00236                 first = con->row - 1;
00237                 second = con->row;
00238                 orientation = O_HORIZONTAL;
00239         } else if (to_bottom < to_right &&
00240                    to_bottom < to_left &&
00241                    to_bottom < to_top) {
00242                 /* …bottom border */
00243                 first = con->row + (con->rowspan - 1);
00244                 if (!cell_exists(ws, con->col, first) ||
00245                     (first == (ws->rows-1)))
00246                         return false;
00247 
00248                 second = first + 1;
00249                 orientation = O_HORIZONTAL;
00250         }
00251 
00252        return resize_graphical_handler(conn, ws, first, second, orientation, event);
00253 }
00254 
00255 int handle_button_press(void *ignored, xcb_connection_t *conn, xcb_button_press_event_t *event) {
00256         DLOG("Button %d pressed\n", event->state);
00257         /* This was either a focus for a client’s parent (= titlebar)… */
00258         Client *client = table_get(&by_child, event->event);
00259         bool border_click = false;
00260         if (client == NULL) {
00261                 client = table_get(&by_parent, event->event);
00262                 border_click = true;
00263         }
00264         /* See if this was a click with the configured modifier. If so, we need
00265          * to move around the client if it was floating. if not, we just process
00266          * as usual. */
00267         if (config.floating_modifier != 0 &&
00268             (event->state & config.floating_modifier) == config.floating_modifier) {
00269                 if (client == NULL) {
00270                         DLOG("Not handling, floating_modifier was pressed and no client found\n");
00271                         xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
00272                         xcb_flush(conn);
00273                         return 1;
00274                 }
00275                 if (client->fullscreen) {
00276                         DLOG("Not handling, client is in fullscreen mode\n");
00277                         xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
00278                         xcb_flush(conn);
00279                         return 1;
00280                 }
00281                 if (client_is_floating(client)) {
00282                         DLOG("button %d pressed\n", event->detail);
00283                         if (event->detail == 1) {
00284                                 DLOG("left mouse button, dragging\n");
00285                                 floating_drag_window(conn, client, event);
00286                         } else if (event->detail == 3) {
00287                                 bool proportional = (event->state & BIND_SHIFT);
00288                                 DLOG("right mouse button\n");
00289                                 floating_resize_window(conn, client, proportional, event);
00290                         }
00291                         return 1;
00292                 }
00293 
00294                 if (!floating_mod_on_tiled_client(conn, client, event)) {
00295                         xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
00296                         xcb_flush(conn);
00297                 }
00298 
00299                 return 1;
00300         }
00301 
00302         if (client == NULL) {
00303                 /* The client was neither on a client’s titlebar nor on a client itself, maybe on a stack_window? */
00304                 if (button_press_stackwin(conn, event))
00305                         return 1;
00306 
00307                 /* Or on a bar? */
00308                 if (button_press_bar(conn, event))
00309                         return 1;
00310 
00311                 DLOG("Could not handle this button press\n");
00312                 return 1;
00313         }
00314 
00315         /* Set focus in any case */
00316         set_focus(conn, client, true);
00317 
00318         /* Let’s see if this was on the borders (= resize). If not, we’re done */
00319         DLOG("press button on x=%d, y=%d\n", event->event_x, event->event_y);
00320         resize_orientation_t orientation = O_VERTICAL;
00321         Container *con = client->container;
00322         int first, second;
00323 
00324         if (client->dock) {
00325                 DLOG("dock. done.\n");
00326                 xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
00327                 xcb_flush(conn);
00328                 return 1;
00329         }
00330 
00331         DLOG("event->event_x = %d, client->rect.width = %d\n", event->event_x, client->rect.width);
00332 
00333         /* Some clients (xfontsel for example) seem to pass clicks on their
00334          * window to the parent window, thus we receive an event here which in
00335          * reality is a border_click. Check for the position and fix state. */
00336         if (border_click &&
00337             event->event_x >= client->child_rect.x &&
00338             event->event_x <= (client->child_rect.x + client->child_rect.width) &&
00339             event->event_y >= client->child_rect.y &&
00340             event->event_y <= (client->child_rect.y + client->child_rect.height)) {
00341                 DLOG("Fixing border_click = false because of click in child\n");
00342                 border_click = false;
00343         }
00344 
00345         if (!border_click) {
00346                 DLOG("client. done.\n");
00347                 xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
00348                 /* Floating clients should be raised on click */
00349                 if (client_is_floating(client))
00350                         xcb_raise_window(conn, client->frame);
00351                 xcb_flush(conn);
00352                 return 1;
00353         }
00354 
00355         /* Don’t handle events inside the titlebar, only borders are interesting */
00356         i3Font *font = load_font(conn, config.font);
00357         if (event->event_y >= 2 && event->event_y <= (font->height + 2 + 2)) {
00358                 DLOG("click on titlebar\n");
00359 
00360                 /* Floating clients can be dragged by grabbing their titlebar */
00361                 if (client_is_floating(client)) {
00362                         /* Firstly, we raise it. Maybe the user just wanted to raise it without grabbing */
00363                         xcb_raise_window(conn, client->frame);
00364                         xcb_flush(conn);
00365 
00366                         floating_drag_window(conn, client, event);
00367                 }
00368                 return 1;
00369         }
00370 
00371         if (client_is_floating(client))
00372                 return floating_border_click(conn, client, event);
00373 
00374         Workspace *ws = con->workspace;
00375 
00376         if (event->event_y < 2) {
00377                 /* This was a press on the top border */
00378                 if (con->row == 0)
00379                         return 1;
00380                 first = con->row - 1;
00381                 second = con->row;
00382                 orientation = O_HORIZONTAL;
00383         } else if (event->event_y >= (client->rect.height - 2)) {
00384                 /* …bottom border */
00385                 first = con->row + (con->rowspan - 1);
00386                 if (!cell_exists(ws, con->col, first) ||
00387                     (first == (ws->rows-1)))
00388                         return 1;
00389 
00390                 second = first + 1;
00391                 orientation = O_HORIZONTAL;
00392         } else if (event->event_x <= 2) {
00393                 /* …left border */
00394                 if (con->col == 0)
00395                         return 1;
00396 
00397                 first = con->col - 1;
00398                 second = con->col;
00399         } else if (event->event_x > 2) {
00400                 /* …right border */
00401                 first = con->col + (con->colspan - 1);
00402                 DLOG("column %d\n", first);
00403 
00404                 if (!cell_exists(ws, first, con->row) ||
00405                     (first == (ws->cols-1)))
00406                         return 1;
00407 
00408                 second = first + 1;
00409         }
00410 
00411         return resize_graphical_handler(conn, ws, first, second, orientation, event);
00412 }

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