move_resize.c

// jbwm - Minimalist Window Manager for X
// Copyright 2008-2017, Jeffrey E. Bedard <jefbed@gmail.com>
// Copyright 1999-2015, Ciaran Anscomb <jbwm@6809.org.uk>
// See README for license and other details.
#include "move_resize.h"
#include "JBWMClient.h"
#include "font.h"
#include "log.h"
#include "mwm.h"
#include "shape.h"
#include "title_bar.h"
static void jbwm_configure_client(struct JBWMClient * restrict c)
{
	if (!c) // prevent segmentation fault
		return;
	const Window w = c->window;
	struct JBWMRectangle * restrict g = &c->size;
	XSendEvent(c->display, w, true, StructureNotifyMask, (XEvent
		*) &(XConfigureEvent){.x = g->x, .y = g->y, .width = g->width,
		.height = g->height, .type = ConfigureNotify, .event = w,
		.window = w, .above = c->parent, .override_redirect = true,
		.border_width = c->opt.border});
}
static void do_move(Display * d, const Window parent,
	const Window window, struct JBWMRectangle * restrict sz,
	const uint8_t offset)
{
	XMoveResizeWindow(d, parent, sz->x, sz->y - offset,
		sz->width, sz->height + offset);
	XMoveResizeWindow(d, window, 0, offset,
		sz->width, sz->height);
}
void jbwm_move_resize(struct JBWMClient * restrict c)
{
	struct JBWMClientOptions * restrict o = &c->opt;
	const uint8_t offset = o->no_title_bar || o->fullscreen
		? 0 : jbwm_get_font_height();
	if(offset) { // Leave braces in case title bar support was disabled.
		jbwm_handle_mwm_hints(c);
		jbwm_update_title_bar(c);
	} // Skip shaped and fullscreen clients.
	struct JBWMRectangle * restrict s = &c->size;
	do_move(c->display, c->parent, c->window, s, offset);
	/* Use the XOR of the dimension to track changes, thus avoiding
	 * excessive updates. */
	uint16_t szsum = s->width ^ s->height;
	if (szsum != c->szsum) {
		c->szsum = szsum;
		jbwm_set_shape(c);
	}
	jbwm_configure_client(c);
}