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cursor: Fix "jumping opposite edges" issue when resizing

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Commit 08c537e ("xwayland: Honor size increments from
WM_SIZE_HINTS") adjusted only the window width/height according
to the size hints.  If resizing from the top or left edge of the
window, we also need to adjust the window position to keep the
bottom or right edge from jumping around.
This commit is contained in:
John Lindgren 2022-04-02 21:34:51 -04:00 • committed by Johan Malm
parent 47912aebb6
commit 8e1f115486
5 changed files with 59 additions and 78 deletions
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52
src/view.c
View file

@ -4,6 +4,8 @@
#include "labwc.h"
#include "ssd.h"
#define MAX(a, b) (((a) > (b)) ? (a) : (b))
void
view_set_activated(struct view *view, bool activated)
{
@ -52,32 +54,44 @@ view_move_resize(struct view *view, struct wlr_box geo)
#define MIN_VIEW_WIDTH (100)
#define MIN_VIEW_HEIGHT (60)
#if HAVE_XWAYLAND
static int
round_to_increment(int val, int base, int inc)
{
if (base < 0 || inc <= 0)
return val;
return base + (val - base + inc / 2) / inc * inc;
}
#endif
void
view_min_size(struct view *view, int *w, int *h)
view_adjust_size(struct view *view, int *w, int *h)
{
int min_width = MIN_VIEW_WIDTH;
int min_height = MIN_VIEW_HEIGHT;
#if HAVE_XWAYLAND
if (view->type != LAB_XWAYLAND_VIEW) {
goto out;
}
if (!view->xwayland_surface->size_hints) {
goto out;
}
if (view->xwayland_surface->size_hints->min_width > 0
|| view->xwayland_surface->size_hints->min_height > 0) {
min_width = view->xwayland_surface->size_hints->min_width;
min_height = view->xwayland_surface->size_hints->min_height;
}
out:
#endif
if (view->type == LAB_XWAYLAND_VIEW) {
struct wlr_xwayland_surface_size_hints *hints =
view->xwayland_surface->size_hints;
/*
* Honor size increments from WM_SIZE_HINTS. Typically, X11
* terminal emulators will use WM_SIZE_HINTS to make sure that
* the terminal is resized to a width/height evenly divisible by
* the cell (character) size.
*/
if (hints) {
*w = round_to_increment(*w, hints->base_width,
hints->width_inc);
*h = round_to_increment(*h, hints->base_height,
hints->height_inc);
if (w) {
*w = min_width;
}
if (h) {
*h = min_height;
min_width = MAX(1, hints->min_width);
min_height = MAX(1, hints->min_height);
}
}
#endif
*w = MAX(*w, min_width);
*h = MAX(*h, min_height);
}
void