284 lines
9.3 KiB
C
284 lines
9.3 KiB
C
#include "kernel/dispatch.h"
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#include "kernel/client.h"
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#include "kernel/frame.h"
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#include "kernel/parse.h"
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#include "kernel/stacking.h"
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#include "kernel/screen.h"
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#include <glib.h>
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static int resistance;
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static gboolean resist_windows;
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static void parse_assign(char *name, ParseToken *value)
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{
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if (!g_ascii_strcasecmp(name, "strength")) {
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if (value->type != TOKEN_INTEGER)
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yyerror("invalid value");
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else {
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if (value->data.integer >= 0)
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resistance = value->data.integer;
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}
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} else if (!g_ascii_strcasecmp(name, "windows")) {
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if (value->type != TOKEN_BOOL)
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yyerror("invalid value");
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else
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resist_windows = value->data.bool;
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} else
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yyerror("invalid option");
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parse_free_token(value);
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}
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void plugin_setup_config()
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{
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resistance = 10;
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resist_windows = TRUE;
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parse_reg_section("resistance", NULL, parse_assign);
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}
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static void resist_move(Client *c, int *x, int *y)
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{
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GList *it;
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Rect *area;
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int l, t, r, b; /* requested edges */
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int al, at, ar, ab; /* screen area edges */
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int cl, ct, cr, cb; /* current edges */
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int w, h; /* current size */
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Client *snapx = NULL, *snapy = NULL;
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w = c->frame->area.width;
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h = c->frame->area.height;
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l = *x;
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t = *y;
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r = l + w - 1;
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b = t + h - 1;
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cl = c->frame->area.x;
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ct = c->frame->area.y;
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cr = cl + c->frame->area.width - 1;
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cb = ct + c->frame->area.height - 1;
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/* snap to other clients */
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if (resist_windows)
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for (it = stacking_list; it != NULL; it = it->next) {
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Client *target;
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int tl, tt, tr, tb; /* 1 past the target's edges on each side */
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target = it->data;
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/* don't snap to self or non-visibles */
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if (!target->frame->visible || target == c) continue;
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tl = target->frame->area.x - 1;
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tt = target->frame->area.y - 1;
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tr = tl + target->frame->area.width + 1;
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tb = tt + target->frame->area.height + 1;
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/* snapx and snapy ensure that the window snaps to the top-most
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window edge available, without going all the way from
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bottom-to-top in the stacking list
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*/
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if (snapx == NULL) {
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if (ct < tb && cb > tt) {
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if (cl >= tr && l < tr && l >= tr - resistance)
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*x = tr, snapx = target;
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else if (cr <= tl && r > tl && r <= tl + resistance)
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*x = tl - w + 1, snapx = target;
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if (snapx != NULL) {
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/* try to corner snap to the window */
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if (ct > tt && t <= tt && t > tt - resistance)
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*y = tt + 1, snapy = target;
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else if (cb < tb && b >= tb && b < tb + resistance)
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*y = tb - h, snapy = target;
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}
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}
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}
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if (snapy == NULL) {
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if (cl < tr && cr > tl) {
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if (ct >= tb && t < tb && t >= tb - resistance)
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*y = tb, snapy = target;
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else if (cb <= tt && b > tt && b <= tt + resistance)
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*y = tt - h + 1, snapy = target;
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if (snapy != NULL) {
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/* try to corner snap to the window */
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if (cl > tl && l <= tl && l > tl - resistance)
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*x = tl + 1, snapx = target;
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else if (cr < tr && r >= tr && r < tr + resistance)
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*x = tr - w, snapx = target;
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}
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}
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}
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if (snapx && snapy) break;
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}
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/* get the screen boundaries */
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area = screen_area(c->desktop);
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al = area->x;
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at = area->y;
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ar = al + area->width - 1;
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ab = at + area->height - 1;
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/* snap to screen edges */
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if (cl >= al && l < al && l >= al - resistance)
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*x = al;
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else if (cr <= ar && r > ar && r <= ar + resistance)
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*x = ar - w + 1;
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if (ct >= at && t < at && t >= at - resistance)
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*y = at;
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else if (cb <= ab && b > ab && b < ab + resistance)
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*y = ab - h + 1;
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}
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static void resist_size(Client *c, int *w, int *h, Corner corn)
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{
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GList *it;
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Client *target; /* target */
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int l, t, r, b; /* my left, top, right and bottom sides */
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int dlt, drb; /* my destination left/top and right/bottom sides */
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int tl, tt, tr, tb; /* target's left, top, right and bottom bottom sides */
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Rect *area;
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int al, at, ar, ab; /* screen boundaries */
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Client *snapx = NULL, *snapy = NULL;
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l = c->frame->area.x;
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r = l + c->frame->area.width - 1;
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t = c->frame->area.y;
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b = t + c->frame->area.height - 1;
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/* get the screen boundaries */
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area = screen_area(c->desktop);
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al = area->x;
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at = area->y;
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ar = al + area->width - 1;
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ab = at + area->height - 1;
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/* snap to other windows */
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if (resist_windows) {
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for (it = stacking_list; it != NULL; it = it->next) {
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target = it->data;
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/* don't snap to invisibles or ourself */
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if (!target->frame->visible || target == c) continue;
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tl = target->frame->area.x;
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tr = target->frame->area.x + target->frame->area.width - 1;
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tt = target->frame->area.y;
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tb = target->frame->area.y + target->frame->area.height - 1;
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if (snapx == NULL) {
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/* horizontal snapping */
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if (t < tb && b > tt) {
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switch (corn) {
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case Corner_TopLeft:
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case Corner_BottomLeft:
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dlt = l;
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drb = r + *w - c->frame->area.width;
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if (r < tl && drb >= tl && drb < tl + resistance)
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*w = tl - l, snapx = target;
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break;
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case Corner_TopRight:
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case Corner_BottomRight:
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dlt = l - *w + c->frame->area.width;
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drb = r;
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if (l > tr && dlt <= tr && dlt > tr - resistance)
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*w = r - tr, snapx = target;
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break;
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}
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}
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}
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if (snapy == NULL) {
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/* vertical snapping */
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if (l < tr && r > tl) {
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switch (corn) {
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case Corner_TopLeft:
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case Corner_TopRight:
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dlt = t;
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drb = b + *h - c->frame->area.height;
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if (b < tt && drb >= tt && drb < tt + resistance)
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*h = tt - t, snapy = target;
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break;
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case Corner_BottomLeft:
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case Corner_BottomRight:
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dlt = t - *h + c->frame->area.height;
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drb = b;
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if (t > tb && dlt <= tb && dlt > tb - resistance)
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*h = b - tb, snapy = target;
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break;
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}
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}
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}
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/* snapped both ways */
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if (snapx && snapy) break;
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}
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}
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/* snap to screen edges */
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/* horizontal snapping */
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switch (corn) {
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case Corner_TopLeft:
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case Corner_BottomLeft:
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dlt = l;
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drb = r + *w - c->frame->area.width;
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if (r <= ar && drb > ar && drb <= ar + resistance)
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*w = ar - l + 1;
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break;
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case Corner_TopRight:
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case Corner_BottomRight:
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dlt = l - *w + c->frame->area.width;
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drb = r;
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if (l >= al && dlt < al && dlt >= al - resistance)
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*w = r - al + 1;
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break;
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}
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/* vertical snapping */
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switch (corn) {
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case Corner_TopLeft:
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case Corner_TopRight:
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dlt = t;
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drb = b + *h - c->frame->area.height;
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if (b <= ab && drb > ab && drb <= ab + resistance)
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*h = ab - t + 1;
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break;
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case Corner_BottomLeft:
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case Corner_BottomRight:
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dlt = t - *h + c->frame->area.height;
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drb = b;
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if (t >= at && dlt < at && dlt >= at - resistance)
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*h = b - at + 1;
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break;
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}
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/* round down for size increments */
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*w -= c->frame->area.width + c->frame->size.left + c->frame->size.right;
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*w = *w / c->size_inc.width * c->size_inc.width;
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*w += c->frame->area.width + c->frame->size.left + c->frame->size.right;
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*h -= c->frame->area.height + c->frame->size.top + c->frame->size.bottom;
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*h = *h / c->size_inc.height * c->size_inc.height;
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*h += c->frame->area.height + c->frame->size.top + c->frame->size.bottom;
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}
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static void event(ObEvent *e, void *foo)
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{
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if (e->type == Event_Client_Moving)
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resist_move(e->data.c.client, &e->data.c.num[0], &e->data.c.num[1]);
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else if (e->type == Event_Client_Resizing)
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resist_size(e->data.c.client, &e->data.c.num[0], &e->data.c.num[1],
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e->data.c.num[2]);
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}
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void plugin_startup()
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{
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dispatch_register(Event_Client_Moving | Event_Client_Resizing,
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(EventHandler)event, NULL);
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}
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void plugin_shutdown()
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{
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dispatch_register(0, (EventHandler)event, NULL);
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}
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