On Thu, Jul 23, 2015 at 02:55:13PM -0500, Derek Foreman wrote:
> No longer call weston_output_update_zoom() when trying to zoom out
> on an unzoomed output.
>
> Add an assert() to make sure update_zoom is never called without an
> active zoom.
>
> Signed-off-by: Derek Foreman <der...@osg.samsung.com>
A few probably dumb questions...
> ---
> desktop-shell/shell.c | 5 ++++-
> src/zoom.c | 3 +++
> 2 files changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/desktop-shell/shell.c b/desktop-shell/shell.c
> index 0137ca3..8f90710 100644
> --- a/desktop-shell/shell.c
> +++ b/desktop-shell/shell.c
> @@ -4804,7 +4804,10 @@ do_zoom(struct weston_seat *seat, uint32_t time,
> uint32_t key, uint32_t axis,
> output->zoom.level = 0.0;
> else if (output->zoom.level > output->zoom.max_level)
> output->zoom.level = output->zoom.max_level;
> - else if (!output->zoom.active) {
> +
> + if (!output->zoom.active) {
What exactly is zoom.active tracking? That there is a zoom operation
undergoing, or the individual zoom animation steps?
> + if (output->zoom.level <= 0.0)
> + continue;
The first part of the earlier if statement already checks for zoom.level
less than 0; perhaps it could be altered to check for <= 0.0 and
continue at that point? Might make for clearer logic.
(Does negative zoom have any particular meaning? If not, why not make
the value unsigned?)
> weston_output_activate_zoom(output);
> }
> diff --git a/src/zoom.c b/src/zoom.c
> index 878ecc2..39515d4 100644
> --- a/src/zoom.c
> +++ b/src/zoom.c
> @@ -25,6 +25,7 @@
>
> #include "config.h"
>
> +#include <assert.h>
> #include <stdlib.h>
> #include <stdbool.h>
>
> @@ -135,6 +136,8 @@ weston_output_update_zoom(struct weston_output *output)
> {
> struct weston_seat *seat = weston_zoom_pick_seat(output->compositor);
>
> + assert(output->zoom.active);
> +
> output->zoom.current.x = seat->pointer->x;
> output->zoom.current.y = seat->pointer->y;
>
> --
> 2.1.4
>
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Bryce
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