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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 * This file contains the functions for resizing table columns/rows because 00011 * it’s actually lots of work, compared to the other handlers. 00012 * 00013 */ 00014 #include <stdlib.h> 00015 #include <assert.h> 00016 00017 #include <xcb/xcb.h> 00018 #include <xcb/xcb_event.h> 00019 00020 #include "i3.h" 00021 #include "data.h" 00022 #include "resize.h" 00023 #include "util.h" 00024 #include "xcb.h" 00025 #include "debug.h" 00026 #include "layout.h" 00027 #include "randr.h" 00028 #include "config.h" 00029 #include "floating.h" 00030 #include "workspace.h" 00031 #include "log.h" 00032 00033 /* 00034 * This is an ugly data structure which we need because there is no standard 00035 * way of having nested functions (only available as a gcc extension at the 00036 * moment, clang doesn’t support it) or blocks (only available as a clang 00037 * extension and only on Mac OS X systems at the moment). 00038 * 00039 */ 00040 struct callback_params { 00041 resize_orientation_t orientation; 00042 Output *screen; 00043 xcb_window_t helpwin; 00044 uint32_t *new_position; 00045 }; 00046 00047 DRAGGING_CB(resize_callback) { 00048 struct callback_params *params = extra; 00049 Output *screen = params->screen; 00050 DLOG("new x = %d, y = %d\n", new_x, new_y); 00051 if (params->orientation == O_VERTICAL) { 00052 /* Check if the new coordinates are within screen boundaries */ 00053 if (new_x > (screen->rect.x + screen->rect.width - 25) || 00054 new_x < (screen->rect.x + 25)) 00055 return; 00056 00057 *(params->new_position) = new_x; 00058 xcb_configure_window(conn, params->helpwin, XCB_CONFIG_WINDOW_X, params->new_position); 00059 } else { 00060 if (new_y > (screen->rect.y + screen->rect.height - 25) || 00061 new_y < (screen->rect.y + 25)) 00062 return; 00063 00064 *(params->new_position) = new_y; 00065 xcb_configure_window(conn, params->helpwin, XCB_CONFIG_WINDOW_Y, params->new_position); 00066 } 00067 00068 xcb_flush(conn); 00069 } 00070 00071 /* 00072 * Renders the resize window between the first/second container and resizes 00073 * the table column/row. 00074 * 00075 */ 00076 int resize_graphical_handler(xcb_connection_t *conn, Workspace *ws, int first, int second, 00077 resize_orientation_t orientation, xcb_button_press_event_t *event) { 00078 uint32_t new_position; 00079 Output *screen = get_output_containing(event->root_x, event->root_y); 00080 if (screen == NULL) { 00081 ELOG("BUG: No screen found at this position (%d, %d)\n", event->root_x, event->root_y); 00082 return 1; 00083 } 00084 00085 /* We cannot use the X root window's width_in_pixels or height_in_pixels 00086 * attributes here since they are not updated when you configure new 00087 * screens during runtime. Instead, we just use the most right and most 00088 * bottom Xinerama screen and use their position + width/height to get 00089 * the area of pixels currently in use */ 00090 Output *most_right = get_output_most(D_RIGHT, screen), 00091 *most_bottom = get_output_most(D_DOWN, screen); 00092 00093 DLOG("event->event_x = %d, event->root_x = %d\n", event->event_x, event->root_x); 00094 00095 DLOG("Screen dimensions: (%d, %d) %d x %d\n", screen->rect.x, screen->rect.y, screen->rect.width, screen->rect.height); 00096 00097 uint32_t mask = 0; 00098 uint32_t values[2]; 00099 00100 mask = XCB_CW_OVERRIDE_REDIRECT; 00101 values[0] = 1; 00102 00103 /* Open a new window, the resizebar. Grab the pointer and move the window around 00104 as the user moves the pointer. */ 00105 Rect grabrect = {0, 00106 0, 00107 most_right->rect.x + most_right->rect.width, 00108 most_bottom->rect.x + most_bottom->rect.height}; 00109 xcb_window_t grabwin = create_window(conn, grabrect, XCB_WINDOW_CLASS_INPUT_ONLY, -1, true, mask, values); 00110 00111 Rect helprect; 00112 if (orientation == O_VERTICAL) { 00113 helprect.x = event->root_x; 00114 helprect.y = screen->rect.y; 00115 helprect.width = 2; 00116 helprect.height = screen->rect.height; 00117 new_position = event->root_x; 00118 } else { 00119 helprect.x = screen->rect.x; 00120 helprect.y = event->root_y; 00121 helprect.width = screen->rect.width; 00122 helprect.height = 2; 00123 new_position = event->root_y; 00124 } 00125 00126 mask = XCB_CW_BACK_PIXEL; 00127 values[0] = config.client.focused.border; 00128 00129 mask |= XCB_CW_OVERRIDE_REDIRECT; 00130 values[1] = 1; 00131 00132 xcb_window_t helpwin = create_window(conn, helprect, XCB_WINDOW_CLASS_INPUT_OUTPUT, 00133 (orientation == O_VERTICAL ? 00134 XCB_CURSOR_SB_H_DOUBLE_ARROW : 00135 XCB_CURSOR_SB_V_DOUBLE_ARROW), true, mask, values); 00136 00137 xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin); 00138 00139 xcb_flush(conn); 00140 00141 struct callback_params params = { orientation, screen, helpwin, &new_position }; 00142 00143 drag_pointer(conn, NULL, event, grabwin, BORDER_TOP, resize_callback, ¶ms); 00144 00145 xcb_destroy_window(conn, helpwin); 00146 xcb_destroy_window(conn, grabwin); 00147 xcb_flush(conn); 00148 00149 int pixels; 00150 if (orientation == O_VERTICAL) 00151 pixels = (new_position - event->root_x); 00152 else pixels = (new_position - event->root_y); 00153 resize_container(conn, ws, first, second, orientation, pixels); 00154 00155 return 1; 00156 } 00157 00158 /* 00159 * Adjusts the container size factors according to the resizing parameters. 00160 * This is an abstraction used by resize_container. 00161 */ 00162 static void adjust_container_factors(float *factors, int ws_size, int unoccupied_size, 00163 int num_items, int first, int second, int pixels) { 00164 /* Find the current sizes */ 00165 int sizes[num_items]; 00166 for (int i = 0; i < num_items; ++i) 00167 sizes[i] = factors[i] == 0 ? ws_size / num_items : unoccupied_size * factors[i]; 00168 00169 /* Adjust them */ 00170 sizes[first] += pixels; 00171 sizes[second] -= pixels; 00172 00173 /* Calculate the new unoccupied size */ 00174 if (factors[first] == 0) unoccupied_size += ws_size / num_items; 00175 if (factors[second] == 0) unoccupied_size += ws_size / num_items; 00176 00177 /* Calculate the new factors */ 00178 for (int i = 0; i < num_items; ++i) { 00179 if (factors[i] != 0 || i == first || i == second) 00180 factors[i] = (float)sizes[i] / unoccupied_size; 00181 } 00182 } 00183 00184 /* 00185 * Resizes a column/row by the given amount of pixels. Called by 00186 * resize_graphical_handler (the user clicked) or parse_resize_command (the 00187 * user issued the command) 00188 * 00189 */ 00190 void resize_container(xcb_connection_t *conn, Workspace *ws, int first, int second, 00191 resize_orientation_t orientation, int pixels) { 00192 if (orientation == O_VERTICAL) { 00193 adjust_container_factors(ws->width_factor, ws->rect.width, 00194 get_unoccupied_x(ws), ws->cols, first, second, pixels); 00195 } 00196 else { 00197 adjust_container_factors(ws->height_factor, workspace_height(ws), 00198 get_unoccupied_y(ws), ws->rows, first, second, pixels); 00199 } 00200 00201 render_layout(conn); 00202 }