574 lines
26 KiB
C
574 lines
26 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 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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* layout.c: Functions handling layout/drawing of window decorations
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <xcb/xcb.h>
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#include <assert.h>
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#include <math.h>
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#include "config.h"
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#include "i3.h"
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#include "xcb.h"
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#include "table.h"
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#include "util.h"
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#include "xinerama.h"
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#include "layout.h"
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/*
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* Updates *destination with new_value and returns true if it was changed or false
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* if it was the same
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*
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*/
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static bool update_if_necessary(uint32_t *destination, const uint32_t new_value) {
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int old_value = *destination;
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return ((*destination = new_value) != old_value);
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}
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/*
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* Gets the unoccupied space (= space which is available for windows which were resized by the user)
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* for the given row. This is necessary to render both, customly resized windows and never touched
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* windows correctly, meaning that the aspect ratio will be maintained when opening new windows.
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*
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*/
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int get_unoccupied_x(Workspace *workspace, int row) {
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int unoccupied = workspace->rect.width;
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float default_factor = ((float)workspace->rect.width / workspace->cols) / workspace->rect.width;
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LOG("get_unoccupied_x(), starting with %d, default_factor = %f\n", unoccupied, default_factor);
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for (int cols = 0; cols < workspace->cols;) {
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Container *con = workspace->table[cols][row];
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LOG("width_factor[%d][%d] = %f, colspan = %d\n", cols, row, con->width_factor, con->colspan);
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if (con->width_factor == 0)
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unoccupied -= workspace->rect.width * default_factor * con->colspan;
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cols += con->colspan;
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}
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assert(unoccupied != 0);
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LOG("unoccupied space: %d\n", unoccupied);
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return unoccupied;
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}
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/* See get_unoccupied_x() */
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int get_unoccupied_y(Workspace *workspace, int col) {
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int unoccupied = workspace->rect.height;
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float default_factor = ((float)workspace->rect.height / workspace->rows) / workspace->rect.height;
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LOG("get_unoccupied_y(), starting with %d, default_factor = %f\n", unoccupied, default_factor);
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for (int rows = 0; rows < workspace->rows;) {
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Container *con = workspace->table[col][rows];
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LOG("height_factor[%d][%d] = %f, rowspan %d\n", col, rows, con->height_factor, con->rowspan);
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if (con->height_factor == 0)
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unoccupied -= workspace->rect.height * default_factor * con->rowspan;
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rows += con->rowspan;
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}
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assert(unoccupied != 0);
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LOG("unoccupied space: %d\n", unoccupied);
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return unoccupied;
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}
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/*
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* Redecorates the given client correctly by checking if it’s in a stacking container and
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* re-rendering the stack window or just calling decorate_window if it’s not in a stacking
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* container.
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*
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*/
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void redecorate_window(xcb_connection_t *conn, Client *client) {
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if (client->container->mode == MODE_STACK) {
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render_container(conn, client->container);
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/* We clear the frame to generate exposure events, because the color used
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in drawing may be different */
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xcb_clear_area(conn, true, client->frame, 0, 0, client->rect.width, client->rect.height);
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} else decorate_window(conn, client, client->frame, client->titlegc, 0);
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xcb_flush(conn);
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}
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/*
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* (Re-)draws window decorations for a given Client onto the given drawable/graphic context.
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* When in stacking mode, the window decorations are drawn onto an own window.
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*
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*/
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void decorate_window(xcb_connection_t *conn, Client *client, xcb_drawable_t drawable, xcb_gcontext_t gc, int offset) {
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i3Font *font = load_font(conn, config.font);
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int decoration_height = font->height + 2 + 2;
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uint32_t background_color,
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text_color,
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border_color;
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/* Clients without a container (docks) won’t get decorated */
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if (client->container == NULL)
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return;
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if (client->container->currently_focused == client) {
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/* Distinguish if the window is currently focused… */
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if (CUR_CELL->currently_focused == client)
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background_color = get_colorpixel(conn, "#285577");
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/* …or if it is the focused window in a not focused container */
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else background_color = get_colorpixel(conn, "#555555");
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text_color = get_colorpixel(conn, "#ffffff");
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border_color = get_colorpixel(conn, "#4c7899");
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} else {
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background_color = get_colorpixel(conn, "#222222");
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text_color = get_colorpixel(conn, "#888888");
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border_color = get_colorpixel(conn, "#333333");
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}
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/* Our plan is the following:
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- Draw a rect around the whole client in background_color
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- Draw two lines in a lighter color
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- Draw the window’s title
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*/
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/* Draw a rectangle in background color around the window */
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xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, background_color);
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/* In stacking mode, we only render the rect for this specific decoration */
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if (client->container->mode == MODE_STACK) {
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xcb_rectangle_t rect = {0, offset, client->container->width, offset + decoration_height };
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xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
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} else {
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/* We need to use the container’s width because it is the more recent value - when
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in stacking mode, clients get reconfigured only on demand (the not active client
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is not reconfigured), so the client’s rect.width would be wrong */
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xcb_rectangle_t rect = {0, 0, client->container->width, client->rect.height};
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xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
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/* Draw the inner background to have a black frame around clients (such as mplayer)
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which cannot be resized exactly in our frames and therefore are centered */
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xcb_change_gc_single(conn, client->titlegc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
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xcb_rectangle_t crect = {2, decoration_height,
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client->rect.width - (2 + 2), client->rect.height - 2 - decoration_height};
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xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
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}
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/* Draw the lines */
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xcb_draw_line(conn, drawable, gc, border_color, 2, offset, client->rect.width, offset);
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xcb_draw_line(conn, drawable, gc, border_color, 2, offset + font->height + 3,
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2 + client->rect.width, offset + font->height + 3);
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/* If the client has a title, we draw it */
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if (client->name != NULL) {
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/* Draw the font */
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uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
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uint32_t values[] = { text_color, background_color, font->id };
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xcb_change_gc(conn, gc, mask, values);
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/* name_len == -1 means this is a legacy application which does not specify _NET_WM_NAME,
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and we don’t handle the old window name (COMPOUND_TEXT) but only _NET_WM_NAME, which
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is UTF-8 */
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if (client->name_len == -1)
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xcb_image_text_8(conn, strlen(client->name), drawable, gc, 3 /* X */,
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offset + font->height /* Y = baseline of font */, client->name);
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else
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xcb_image_text_16(conn, client->name_len, drawable, gc, 3 /* X */,
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offset + font->height /* Y = baseline of font */, (xcb_char2b_t*)client->name);
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}
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}
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/*
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* Pushes the client’s x and y coordinates to X11
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*
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*/
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static void reposition_client(xcb_connection_t *conn, Client *client) {
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LOG("frame 0x%08x needs to be pushed to %dx%d\n", client->frame, client->rect.x, client->rect.y);
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/* Note: We can use a pointer to client->x like an array of uint32_ts
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because it is followed by client->y by definition */
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xcb_configure_window(conn, client->frame, XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, &(client->rect.x));
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}
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/*
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* Pushes the client’s width/height to X11 and resizes the child window
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*
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*/
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static void resize_client(xcb_connection_t *conn, Client *client) {
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i3Font *font = load_font(conn, config.font);
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LOG("resizing client 0x%08x to %d x %d\n", client->frame, client->rect.width, client->rect.height);
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xcb_configure_window(conn, client->frame,
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XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT,
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&(client->rect.width));
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/* Adjust the position of the child inside its frame.
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* The coordinates of the child are relative to its frame, we
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* add a border of 2 pixel to each value */
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uint32_t mask = XCB_CONFIG_WINDOW_X |
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XCB_CONFIG_WINDOW_Y |
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XCB_CONFIG_WINDOW_WIDTH |
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XCB_CONFIG_WINDOW_HEIGHT;
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Rect *rect = &(client->child_rect);
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switch ((client->container != NULL ? client->container->mode : MODE_DEFAULT)) {
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case MODE_STACK:
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rect->x = 2;
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rect->y = 0;
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rect->width = client->rect.width - (2 + 2);
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rect->height = client->rect.height - 2;
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break;
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default:
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if (client->titlebar_position == TITLEBAR_OFF) {
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rect->x = 0;
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rect->y = 0;
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rect->width = client->rect.width;
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rect->height = client->rect.height;
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} else {
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rect->x = 2;
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rect->y = font->height + 2 + 2;
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rect->width = client->rect.width - (2 + 2);
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rect->height = client->rect.height - ((font->height + 2 + 2) + 2);
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}
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break;
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}
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/* Obey the ratio, if any */
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if (client->proportional_height != 0 &&
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client->proportional_width != 0) {
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LOG("proportional height = %d, width = %d\n", client->proportional_height, client->proportional_width);
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double new_height = rect->height + 1;
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int new_width = rect->width;
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while (new_height > rect->height) {
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new_height = ((double)client->proportional_height / client->proportional_width) * new_width;
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if (new_height > rect->height)
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new_width--;
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}
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/* Center the window */
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rect->y += ceil(rect->height / 2) - floor(new_height / 2);
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rect->x += ceil(rect->width / 2) - floor(new_width / 2);
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rect->height = new_height;
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rect->width = new_width;
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LOG("new_height = %f, new_width = %d\n", new_height, new_width);
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}
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LOG("child will be at %dx%d with size %dx%d\n", rect->x, rect->y, rect->width, rect->height);
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xcb_configure_window(conn, client->child, mask, &(rect->x));
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/* After configuring a child window we need to fake a configure_notify_event according
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to ICCCM 4.2.3. This seems rather broken, especially since X sends exactly the same
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configure_notify_event automatically according to xtrace. Anyone knows details? */
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fake_configure_notify(conn, *rect, client->child);
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}
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/*
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* Renders the given container. Is called by render_layout() or individually (for example
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* when focus changes in a stacking container)
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*
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*/
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void render_container(xcb_connection_t *conn, Container *container) {
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Client *client;
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int num_clients = 0, current_client = 0;
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if (container->currently_focused == NULL)
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return;
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CIRCLEQ_FOREACH(client, &(container->clients), clients)
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num_clients++;
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if (container->mode == MODE_DEFAULT) {
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LOG("got %d clients in this default container.\n", num_clients);
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CIRCLEQ_FOREACH(client, &(container->clients), clients) {
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/* If the client is in fullscreen mode, it does not get reconfigured */
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if (container->workspace->fullscreen_client == client) {
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current_client++;
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continue;
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}
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/* Check if we changed client->x or client->y by updating it.
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* Note the bitwise OR instead of logical OR to force evaluation of both statements */
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if (client->force_reconfigure |
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update_if_necessary(&(client->rect.x), container->x) |
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update_if_necessary(&(client->rect.y), container->y +
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(container->height / num_clients) * current_client))
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reposition_client(conn, client);
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/* TODO: vertical default layout */
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if (client->force_reconfigure |
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update_if_necessary(&(client->rect.width), container->width) |
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update_if_necessary(&(client->rect.height), container->height / num_clients))
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resize_client(conn, client);
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client->force_reconfigure = false;
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current_client++;
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}
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} else {
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i3Font *font = load_font(conn, config.font);
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int decoration_height = (font->height + 2 + 2);
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struct Stack_Window *stack_win = &(container->stack_win);
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/* Check if we need to remap our stack title window, it gets unmapped when the container
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is empty in src/handlers.c:unmap_notify() */
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if (stack_win->rect.height == 0)
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xcb_map_window(conn, stack_win->window);
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/* Check if we need to reconfigure our stack title window */
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if (update_if_necessary(&(stack_win->rect.x), container->x) |
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update_if_necessary(&(stack_win->rect.y), container->y) |
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update_if_necessary(&(stack_win->rect.width), container->width) |
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update_if_necessary(&(stack_win->rect.height), decoration_height * num_clients)) {
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/* Configuration can happen in two slightly different ways:
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If there is no client in fullscreen mode, 5 parameters are passed
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(x, y, width, height, stack mode is set to above which means top-most position).
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If there is a fullscreen client, the fourth parameter is set to to the
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fullscreen window as sibling and the stack mode is set to below, which means
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that the stack_window will be placed just below the sibling, that is, under
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the fullscreen window.
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*/
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uint32_t values[] = { stack_win->rect.x, stack_win->rect.y,
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stack_win->rect.width, stack_win->rect.height,
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XCB_STACK_MODE_ABOVE, XCB_STACK_MODE_BELOW };
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uint32_t mask = XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y |
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XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT |
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XCB_CONFIG_WINDOW_STACK_MODE;
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/* If there is no fullscreen client, we raise the stack window */
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if (container->workspace->fullscreen_client != NULL) {
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mask |= XCB_CONFIG_WINDOW_SIBLING;
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values[4] = container->workspace->fullscreen_client->frame;
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}
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xcb_configure_window(conn, stack_win->window, mask, values);
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}
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/* Reconfigure the currently focused client, if necessary. It is the only visible one */
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client = container->currently_focused;
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if (container->workspace->fullscreen_client == NULL) {
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uint32_t values[] = { XCB_STACK_MODE_ABOVE };
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xcb_configure_window(conn, client->frame, XCB_CONFIG_WINDOW_STACK_MODE, values);
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}
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/* Render the decorations of all clients */
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CIRCLEQ_FOREACH(client, &(container->clients), clients) {
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/* If the client is in fullscreen mode, it does not get reconfigured */
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if (container->workspace->fullscreen_client == client) {
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current_client++;
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continue;
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}
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/* Check if we changed client->x or client->y by updating it.
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* Note the bitwise OR instead of logical OR to force evaluation of both statements */
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if (client->force_reconfigure |
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update_if_necessary(&(client->rect.x), container->x) |
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update_if_necessary(&(client->rect.y), container->y + (decoration_height * num_clients)))
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reposition_client(conn, client);
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if (client->force_reconfigure |
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update_if_necessary(&(client->rect.width), container->width) |
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update_if_necessary(&(client->rect.height), container->height - (decoration_height * num_clients)))
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resize_client(conn, client);
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client->force_reconfigure = false;
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decorate_window(conn, client, stack_win->window, stack_win->gc,
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current_client++ * decoration_height);
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}
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}
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}
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static void render_bars(xcb_connection_t *conn, Workspace *r_ws, int width, int *height) {
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Client *client;
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SLIST_FOREACH(client, &(r_ws->dock_clients), dock_clients) {
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LOG("client is at %d, should be at %d\n", client->rect.y, *height);
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if (client->force_reconfigure |
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update_if_necessary(&(client->rect.x), 0) |
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update_if_necessary(&(client->rect.y), *height))
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reposition_client(conn, client);
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if (client->force_reconfigure |
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update_if_necessary(&(client->rect.width), width) |
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update_if_necessary(&(client->rect.height), client->desired_height))
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resize_client(conn, client);
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client->force_reconfigure = false;
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*height += client->desired_height;
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}
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}
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static void render_internal_bar(xcb_connection_t *conn, Workspace *r_ws, int width, int height) {
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LOG("Rendering internal bar\n");
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i3Font *font = load_font(conn, config.font);
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i3Screen *screen = r_ws->screen;
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enum { SET_NORMAL = 0, SET_FOCUSED = 1 };
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uint32_t background_color[2],
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text_color[2],
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border_color[2],
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black;
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char label[3];
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black = get_colorpixel(conn, "#000000");
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background_color[SET_NORMAL] = get_colorpixel(conn, "#222222");
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text_color[SET_NORMAL] = get_colorpixel(conn, "#888888");
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border_color[SET_NORMAL] = get_colorpixel(conn, "#333333");
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background_color[SET_FOCUSED] = get_colorpixel(conn, "#285577");
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text_color[SET_FOCUSED] = get_colorpixel(conn, "#ffffff");
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border_color[SET_FOCUSED] = get_colorpixel(conn, "#4c7899");
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/* Fill the whole bar in black */
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xcb_change_gc_single(conn, screen->bargc, XCB_GC_FOREGROUND, black);
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xcb_rectangle_t rect = {0, 0, width, height};
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xcb_poly_fill_rectangle(conn, screen->bar, screen->bargc, 1, &rect);
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/* Set font */
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xcb_change_gc_single(conn, screen->bargc, XCB_GC_FONT, font->id);
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int drawn = 0;
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for (int c = 0; c < 10; c++) {
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if (workspaces[c].screen == screen) {
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int set = (screen->current_workspace == c ? SET_FOCUSED : SET_NORMAL);
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xcb_draw_rect(conn, screen->bar, screen->bargc, border_color[set],
|
||
drawn * height, 1, height - 2, height - 2);
|
||
xcb_draw_rect(conn, screen->bar, screen->bargc, background_color[set],
|
||
drawn * height + 1, 2, height - 4, height - 4);
|
||
|
||
snprintf(label, sizeof(label), "%d", c+1);
|
||
xcb_change_gc_single(conn, screen->bargc, XCB_GC_FOREGROUND, text_color[set]);
|
||
xcb_change_gc_single(conn, screen->bargc, XCB_GC_BACKGROUND, background_color[set]);
|
||
xcb_image_text_8(conn, strlen(label), screen->bar, screen->bargc, drawn * height + 5 /* X */,
|
||
font->height + 1 /* Y = baseline of font */, label);
|
||
drawn++;
|
||
}
|
||
}
|
||
|
||
LOG("done rendering internal\n");
|
||
}
|
||
|
||
/*
|
||
* Modifies the event mask of all clients on the given workspace to either ignore or to handle
|
||
* enter notifies. It is handy to ignore notifies because they will be sent when a window is mapped
|
||
* under the cursor, thus when the user didn’t enter the window actively at all.
|
||
*
|
||
*/
|
||
void ignore_enter_notify_forall(xcb_connection_t *conn, Workspace *workspace, bool ignore_enter_notify) {
|
||
Client *client;
|
||
uint32_t values[1];
|
||
|
||
LOG("Ignore enter_notify = %d\n", ignore_enter_notify);
|
||
|
||
FOR_TABLE(workspace)
|
||
CIRCLEQ_FOREACH(client, &(workspace->table[cols][rows]->clients), clients) {
|
||
/* Change event mask for the decorations */
|
||
values[0] = FRAME_EVENT_MASK;
|
||
if (ignore_enter_notify)
|
||
values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
|
||
xcb_change_window_attributes(conn, client->frame, XCB_CW_EVENT_MASK, values);
|
||
|
||
/* Change event mask for the child itself */
|
||
values[0] = CHILD_EVENT_MASK;
|
||
if (ignore_enter_notify)
|
||
values[0] &= ~(XCB_EVENT_MASK_ENTER_WINDOW);
|
||
xcb_change_window_attributes(conn, client->child, XCB_CW_EVENT_MASK, values);
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Renders the whole layout, that is: Go through each screen, each workspace, each container
|
||
* and render each client. This also renders the bars.
|
||
*
|
||
* If you don’t need to render *everything*, you should call render_container on the container
|
||
* you want to refresh.
|
||
*
|
||
*/
|
||
void render_layout(xcb_connection_t *conn) {
|
||
i3Screen *screen;
|
||
i3Font *font = load_font(conn, config.font);
|
||
|
||
TAILQ_FOREACH(screen, virtual_screens, screens) {
|
||
/* r_ws (rendering workspace) is just a shortcut to the Workspace being currently rendered */
|
||
Workspace *r_ws = &(workspaces[screen->current_workspace]);
|
||
|
||
LOG("Rendering screen %d\n", screen->num);
|
||
|
||
int width = r_ws->rect.width;
|
||
int height = r_ws->rect.height;
|
||
|
||
/* Reserve space for dock clients */
|
||
Client *client;
|
||
SLIST_FOREACH(client, &(r_ws->dock_clients), dock_clients)
|
||
height -= client->desired_height;
|
||
|
||
/* Space for the internal bar */
|
||
height -= (font->height + 6);
|
||
|
||
LOG("got %d rows and %d cols\n", r_ws->rows, r_ws->cols);
|
||
|
||
int xoffset[r_ws->rows];
|
||
int yoffset[r_ws->cols];
|
||
/* Initialize offsets */
|
||
for (int cols = 0; cols < r_ws->cols; cols++)
|
||
yoffset[cols] = r_ws->rect.y;
|
||
for (int rows = 0; rows < r_ws->rows; rows++)
|
||
xoffset[rows] = r_ws->rect.x;
|
||
|
||
dump_table(conn, r_ws);
|
||
|
||
ignore_enter_notify_forall(conn, r_ws, true);
|
||
|
||
/* Go through the whole table and render what’s necessary */
|
||
FOR_TABLE(r_ws) {
|
||
Container *container = r_ws->table[cols][rows];
|
||
int single_width, single_height;
|
||
LOG("\n");
|
||
LOG("========\n");
|
||
LOG("container has %d colspan, %d rowspan\n",
|
||
container->colspan, container->rowspan);
|
||
LOG("container at %d, %d\n", xoffset[rows], yoffset[cols]);
|
||
/* Update position of the container */
|
||
container->row = rows;
|
||
container->col = cols;
|
||
container->x = xoffset[rows];
|
||
container->y = yoffset[cols];
|
||
|
||
if (container->width_factor == 0)
|
||
container->width = (width / r_ws->cols);
|
||
else container->width = get_unoccupied_x(r_ws, rows) * container->width_factor;
|
||
single_width = container->width;
|
||
container->width *= container->colspan;
|
||
|
||
if (container->height_factor == 0)
|
||
container->height = (height / r_ws->rows);
|
||
else container->height = get_unoccupied_y(r_ws, cols) * container->height_factor;
|
||
single_height = container->height;
|
||
container->height *= container->rowspan;
|
||
|
||
/* Render the container if it is not empty */
|
||
render_container(conn, container);
|
||
|
||
xoffset[rows] += single_width;
|
||
yoffset[cols] += single_height;
|
||
LOG("==========\n");
|
||
}
|
||
|
||
ignore_enter_notify_forall(conn, r_ws, false);
|
||
|
||
render_bars(conn, r_ws, width, &height);
|
||
render_internal_bar(conn, r_ws, width, font->height + 6);
|
||
}
|
||
|
||
xcb_flush(conn);
|
||
}
|