203 lines
7.3 KiB
C
203 lines
7.3 KiB
C
/*
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* vim:ts=8:expandtab
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*
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* i3 - an improved dynamic tiling window manager
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*
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* © 2009-2010 Michael Stapelberg and contributors
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*
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* See file LICENSE for license information.
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*
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* This file contains the functions for resizing table columns/rows because
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* it’s actually lots of work, compared to the other handlers.
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*
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*/
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#include <stdlib.h>
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#include <assert.h>
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#include <xcb/xcb.h>
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#include <xcb/xcb_event.h>
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#include "i3.h"
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#include "data.h"
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#include "resize.h"
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#include "util.h"
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#include "xcb.h"
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#include "debug.h"
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#include "layout.h"
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#include "randr.h"
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#include "config.h"
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#include "floating.h"
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#include "workspace.h"
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#include "log.h"
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/*
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* This is an ugly data structure which we need because there is no standard
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* way of having nested functions (only available as a gcc extension at the
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* moment, clang doesn’t support it) or blocks (only available as a clang
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* extension and only on Mac OS X systems at the moment).
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*
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*/
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struct callback_params {
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resize_orientation_t orientation;
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Output *screen;
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xcb_window_t helpwin;
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uint32_t *new_position;
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};
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DRAGGING_CB(resize_callback) {
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struct callback_params *params = extra;
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Output *screen = params->screen;
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DLOG("new x = %d, y = %d\n", new_x, new_y);
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if (params->orientation == O_VERTICAL) {
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/* Check if the new coordinates are within screen boundaries */
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if (new_x > (screen->rect.x + screen->rect.width - 25) ||
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new_x < (screen->rect.x + 25))
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return;
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*(params->new_position) = new_x;
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xcb_configure_window(conn, params->helpwin, XCB_CONFIG_WINDOW_X, params->new_position);
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} else {
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if (new_y > (screen->rect.y + screen->rect.height - 25) ||
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new_y < (screen->rect.y + 25))
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return;
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*(params->new_position) = new_y;
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xcb_configure_window(conn, params->helpwin, XCB_CONFIG_WINDOW_Y, params->new_position);
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}
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xcb_flush(conn);
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}
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/*
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* Renders the resize window between the first/second container and resizes
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* the table column/row.
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*
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*/
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int resize_graphical_handler(xcb_connection_t *conn, Workspace *ws, int first, int second,
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resize_orientation_t orientation, xcb_button_press_event_t *event) {
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uint32_t new_position;
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Output *screen = get_output_containing(event->root_x, event->root_y);
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if (screen == NULL) {
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ELOG("BUG: No screen found at this position (%d, %d)\n", event->root_x, event->root_y);
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return 1;
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}
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/* We cannot use the X root window's width_in_pixels or height_in_pixels
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* attributes here since they are not updated when you configure new
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* screens during runtime. Instead, we just use the most right and most
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* bottom Xinerama screen and use their position + width/height to get
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* the area of pixels currently in use */
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Output *most_right = get_output_most(D_RIGHT, screen),
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*most_bottom = get_output_most(D_DOWN, screen);
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DLOG("event->event_x = %d, event->root_x = %d\n", event->event_x, event->root_x);
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DLOG("Screen dimensions: (%d, %d) %d x %d\n", screen->rect.x, screen->rect.y, screen->rect.width, screen->rect.height);
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uint32_t mask = 0;
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uint32_t values[2];
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mask = XCB_CW_OVERRIDE_REDIRECT;
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values[0] = 1;
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/* Open a new window, the resizebar. Grab the pointer and move the window around
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as the user moves the pointer. */
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Rect grabrect = {0,
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0,
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most_right->rect.x + most_right->rect.width,
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most_bottom->rect.x + most_bottom->rect.height};
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xcb_window_t grabwin = create_window(conn, grabrect, XCB_WINDOW_CLASS_INPUT_ONLY, -1, true, mask, values);
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Rect helprect;
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if (orientation == O_VERTICAL) {
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helprect.x = event->root_x;
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helprect.y = screen->rect.y;
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helprect.width = 2;
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helprect.height = screen->rect.height;
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new_position = event->root_x;
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} else {
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helprect.x = screen->rect.x;
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helprect.y = event->root_y;
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helprect.width = screen->rect.width;
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helprect.height = 2;
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new_position = event->root_y;
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}
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mask = XCB_CW_BACK_PIXEL;
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values[0] = config.client.focused.border;
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mask |= XCB_CW_OVERRIDE_REDIRECT;
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values[1] = 1;
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xcb_window_t helpwin = create_window(conn, helprect, XCB_WINDOW_CLASS_INPUT_OUTPUT,
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(orientation == O_VERTICAL ?
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XCB_CURSOR_SB_H_DOUBLE_ARROW :
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XCB_CURSOR_SB_V_DOUBLE_ARROW), true, mask, values);
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xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin);
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xcb_flush(conn);
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struct callback_params params = { orientation, screen, helpwin, &new_position };
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drag_pointer(conn, NULL, event, grabwin, BORDER_TOP, resize_callback, ¶ms);
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xcb_destroy_window(conn, helpwin);
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xcb_destroy_window(conn, grabwin);
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xcb_flush(conn);
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int pixels;
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if (orientation == O_VERTICAL)
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pixels = (new_position - event->root_x);
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else pixels = (new_position - event->root_y);
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resize_container(conn, ws, first, second, orientation, pixels);
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return 1;
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}
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/*
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* Adjusts the container size factors according to the resizing parameters.
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* This is an abstraction used by resize_container.
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*/
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static void adjust_container_factors(float *factors, int ws_size, int unoccupied_size,
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int num_items, int first, int second, int pixels) {
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/* Find the current sizes */
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int sizes[num_items];
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for (int i = 0; i < num_items; ++i)
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sizes[i] = factors[i] == 0 ? ws_size / num_items : unoccupied_size * factors[i];
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/* Adjust them */
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sizes[first] += pixels;
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sizes[second] -= pixels;
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/* Calculate the new unoccupied size */
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if (factors[first] == 0) unoccupied_size += ws_size / num_items;
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if (factors[second] == 0) unoccupied_size += ws_size / num_items;
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/* Calculate the new factors */
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for (int i = 0; i < num_items; ++i) {
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if (factors[i] != 0 || i == first || i == second)
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factors[i] = (float)sizes[i] / unoccupied_size;
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}
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}
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/*
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* Resizes a column/row by the given amount of pixels. Called by
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* resize_graphical_handler (the user clicked) or parse_resize_command (the
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* user issued the command)
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*
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*/
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void resize_container(xcb_connection_t *conn, Workspace *ws, int first, int second,
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resize_orientation_t orientation, int pixels) {
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if (orientation == O_VERTICAL) {
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adjust_container_factors(ws->width_factor, ws->rect.width,
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get_unoccupied_x(ws), ws->cols, first, second, pixels);
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}
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else {
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adjust_container_factors(ws->height_factor, workspace_height(ws),
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get_unoccupied_y(ws), ws->rows, first, second, pixels);
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}
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render_layout(conn);
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}
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