ad10a366d6
We need to store the information that an assignment was run for a window before actually executing the command. Otherwise, if the command causes a change that causes assignments to be run again, the window might be matched again, causing an infinite loop and hence i3 to freeze or crash.
87 lines
2.6 KiB
C
87 lines
2.6 KiB
C
#undef I3__FILE__
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#define I3__FILE__ "assignments.c"
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/*
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* vim:ts=4:sw=4:expandtab
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*
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* i3 - an improved dynamic tiling window manager
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* © 2009 Michael Stapelberg and contributors (see also: LICENSE)
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*
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* assignments.c: Assignments for specific windows (for_window).
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*
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*/
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#include "all.h"
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/*
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* Checks the list of assignments for the given window and runs all matching
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* ones (unless they have already been run for this specific window).
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*
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*/
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void run_assignments(i3Window *window) {
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DLOG("Checking if any assignments match this window\n");
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bool needs_tree_render = false;
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/* Check if any assignments match */
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Assignment *current;
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TAILQ_FOREACH(current, &assignments, assignments) {
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if (!match_matches_window(&(current->match), window))
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continue;
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bool skip = false;
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for (uint32_t c = 0; c < window->nr_assignments; c++) {
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if (window->ran_assignments[c] != current)
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continue;
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DLOG("This assignment already ran for the given window, not executing it again.\n");
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skip = true;
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break;
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}
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if (skip)
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continue;
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/* Store that we ran this assignment to not execute it again. We have
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* to do this before running the actual command to prevent infinite
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* loops. */
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window->nr_assignments++;
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window->ran_assignments = srealloc(window->ran_assignments, sizeof(Assignment *) * window->nr_assignments);
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window->ran_assignments[window->nr_assignments - 1] = current;
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DLOG("matching assignment, would do:\n");
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if (current->type == A_COMMAND) {
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DLOG("execute command %s\n", current->dest.command);
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char *full_command;
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sasprintf(&full_command, "[id=\"%d\"] %s", window->id, current->dest.command);
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CommandResult *result = parse_command(full_command, NULL);
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free(full_command);
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if (result->needs_tree_render)
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needs_tree_render = true;
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command_result_free(result);
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}
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}
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/* If any of the commands required re-rendering, we will do that now. */
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if (needs_tree_render)
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tree_render();
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}
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/*
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* Returns the first matching assignment for the given window.
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*
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*/
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Assignment *assignment_for(i3Window *window, int type) {
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Assignment *assignment;
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TAILQ_FOREACH(assignment, &assignments, assignments) {
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if ((type != A_ANY && (assignment->type & type) == 0) ||
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!match_matches_window(&(assignment->match), window))
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continue;
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DLOG("got a matching assignment\n");
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return assignment;
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}
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return NULL;
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}
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