Edit
kc3-lang/libxkbcommon/src/xkbcomp/action.c
Ran Benita
- src/xkbcomp/action.c
-
/************************************************************ * Copyright (c) 1994 by Silicon Graphics Computer Systems, Inc. * * Permission to use, copy, modify, and distribute this * software and its documentation for any purpose and without * fee is hereby granted, provided that the above copyright * notice appear in all copies and that both that copyright * notice and this permission notice appear in supporting * documentation, and that the name of Silicon Graphics not be * used in advertising or publicity pertaining to distribution * of the software without specific prior written permission. * Silicon Graphics makes no representation about the suitability * of this software for any purpose. It is provided "as is" * without any express or implied warranty. * * SILICON GRAPHICS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON * GRAPHICS BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH * THE USE OR PERFORMANCE OF THIS SOFTWARE. * ********************************************************/ /* * Copyright © 2012 Intel Corporation * Copyright © 2012 Ran Benita <ran234@gmail.com> * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. * * Author: Daniel Stone <daniel@fooishbar.org> * Ran Benita <ran234@gmail.com> */ #include "xkbcomp-priv.h" #include "text.h" #include "expr.h" #include "action.h" static const ExprDef constTrue = { .common = { .type = STMT_EXPR, .next = NULL }, .op = EXPR_VALUE, .value_type = EXPR_TYPE_BOOLEAN, .value = { .ival = 1 }, }; static const ExprDef constFalse = { .common = { .type = STMT_EXPR, .next = NULL }, .op = EXPR_VALUE, .value_type = EXPR_TYPE_BOOLEAN, .value = { .ival = 0 }, }; enum action_field { ACTION_FIELD_CLEAR_LOCKS, ACTION_FIELD_LATCH_TO_LOCK, ACTION_FIELD_GEN_KEY_EVENT, ACTION_FIELD_REPORT, ACTION_FIELD_DEFAULT, ACTION_FIELD_AFFECT, ACTION_FIELD_INCREMENT, ACTION_FIELD_MODIFIERS, ACTION_FIELD_GROUP, ACTION_FIELD_X, ACTION_FIELD_Y, ACTION_FIELD_ACCEL, ACTION_FIELD_BUTTON, ACTION_FIELD_VALUE, ACTION_FIELD_CONTROLS, ACTION_FIELD_TYPE, ACTION_FIELD_COUNT, ACTION_FIELD_SCREEN, ACTION_FIELD_SAME, ACTION_FIELD_DATA, ACTION_FIELD_DEVICE, ACTION_FIELD_KEYCODE, ACTION_FIELD_MODS_TO_CLEAR, }; ActionsInfo * NewActionsInfo(void) { unsigned type; ActionsInfo *info; info = calloc(1, sizeof(*info)); if (!info) return NULL; for (type = 0; type < _ACTION_TYPE_NUM_ENTRIES; type++) info->actions[type].type = type; /* Apply some "factory defaults". */ /* Increment default button. */ info->actions[ACTION_TYPE_PTR_DEFAULT].dflt.flags = 0; info->actions[ACTION_TYPE_PTR_DEFAULT].dflt.value = 1; return info; } void FreeActionsInfo(ActionsInfo *info) { free(info); } static const LookupEntry fieldStrings[] = { { "clearLocks", ACTION_FIELD_CLEAR_LOCKS }, { "latchToLock", ACTION_FIELD_LATCH_TO_LOCK }, { "genKeyEvent", ACTION_FIELD_GEN_KEY_EVENT }, { "generateKeyEvent", ACTION_FIELD_GEN_KEY_EVENT }, { "report", ACTION_FIELD_REPORT }, { "default", ACTION_FIELD_DEFAULT }, { "affect", ACTION_FIELD_AFFECT }, { "increment", ACTION_FIELD_INCREMENT }, { "modifiers", ACTION_FIELD_MODIFIERS }, { "mods", ACTION_FIELD_MODIFIERS }, { "group", ACTION_FIELD_GROUP }, { "x", ACTION_FIELD_X }, { "y", ACTION_FIELD_Y }, { "accel", ACTION_FIELD_ACCEL }, { "accelerate", ACTION_FIELD_ACCEL }, { "repeat", ACTION_FIELD_ACCEL }, { "button", ACTION_FIELD_BUTTON }, { "value", ACTION_FIELD_VALUE }, { "controls", ACTION_FIELD_CONTROLS }, { "ctrls", ACTION_FIELD_CONTROLS }, { "type", ACTION_FIELD_TYPE }, { "count", ACTION_FIELD_COUNT }, { "screen", ACTION_FIELD_SCREEN }, { "same", ACTION_FIELD_SAME }, { "sameServer", ACTION_FIELD_SAME }, { "data", ACTION_FIELD_DATA }, { "device", ACTION_FIELD_DEVICE }, { "dev", ACTION_FIELD_DEVICE }, { "key", ACTION_FIELD_KEYCODE }, { "keycode", ACTION_FIELD_KEYCODE }, { "kc", ACTION_FIELD_KEYCODE }, { "clearmods", ACTION_FIELD_MODS_TO_CLEAR }, { "clearmodifiers", ACTION_FIELD_MODS_TO_CLEAR }, { NULL, 0 } }; static bool stringToAction(const char *str, unsigned *type_rtrn) { return LookupString(actionTypeNames, str, type_rtrn); } static bool stringToField(const char *str, enum action_field *field_rtrn) { return LookupString(fieldStrings, str, field_rtrn); } static const char * fieldText(enum action_field field) { return LookupValue(fieldStrings, field); } /***====================================================================***/ static inline bool ReportMismatch(struct xkb_keymap *keymap, enum xkb_action_type action, enum action_field field, const char *type) { log_err(keymap->ctx, "Value of %s field must be of type %s; " "Action %s definition ignored\n", fieldText(field), type, ActionTypeText(action)); return false; } static inline bool ReportIllegal(struct xkb_keymap *keymap, enum xkb_action_type action, enum action_field field) { log_err(keymap->ctx, "Field %s is not defined for an action of type %s; " "Action definition ignored\n", fieldText(field), ActionTypeText(action)); return false; } static inline bool ReportActionNotArray(struct xkb_keymap *keymap, enum xkb_action_type action, enum action_field field) { log_err(keymap->ctx, "The %s field in the %s action is not an array; " "Action definition ignored\n", fieldText(field), ActionTypeText(action)); return false; } static inline bool ReportNotFound(struct xkb_keymap *keymap, enum xkb_action_type action, enum action_field field, const char *what, const char *bad) { log_err(keymap->ctx, "%s named %s not found; " "Ignoring the %s field of an %s action\n", what, bad, fieldText(field), ActionTypeText(action)); return false; } static bool HandleNoAction(struct xkb_keymap *keymap, union xkb_action *action, enum action_field field, const ExprDef *array_ndx, const ExprDef *value) { return true; } static bool CheckLatchLockFlags(struct xkb_keymap *keymap, enum xkb_action_type action, enum action_field field, const ExprDef *value, enum xkb_action_flags *flags_inout) { enum xkb_action_flags tmp; bool result; if (field == ACTION_FIELD_CLEAR_LOCKS) tmp = ACTION_LOCK_CLEAR; else if (field == ACTION_FIELD_LATCH_TO_LOCK) tmp = ACTION_LATCH_TO_LOCK; else return false; /* WSGO! */ if (!ExprResolveBoolean(keymap->ctx, value, &result)) return ReportMismatch(keymap, action, field, "boolean"); if (result) *flags_inout |= tmp; else *flags_inout &= ~tmp; return true; } static bool CheckModifierField(struct xkb_keymap *keymap, enum xkb_action_type action, const ExprDef *value, enum xkb_action_flags *flags_inout, xkb_mod_mask_t *mods_rtrn) { if (value->op == EXPR_IDENT) { const char *valStr; valStr = xkb_atom_text(keymap->ctx, value->value.str); if (valStr && (istreq(valStr, "usemodmapmods") || istreq(valStr, "modmapmods"))) { *mods_rtrn = 0; *flags_inout |= ACTION_MODS_LOOKUP_MODMAP; return true; } } if (!ExprResolveModMask(keymap, value, MOD_BOTH, mods_rtrn)) return ReportMismatch(keymap, action, ACTION_FIELD_MODIFIERS, "modifier mask"); *flags_inout &= ~ACTION_MODS_LOOKUP_MODMAP; return true; } static bool HandleSetLatchMods(struct xkb_keymap *keymap, union xkb_action *action, enum action_field field, const ExprDef *array_ndx, const ExprDef *value) { struct xkb_mod_action *act = &action->mods; enum xkb_action_flags rtrn, t1; xkb_mod_mask_t t2; if (array_ndx != NULL) { switch (field) { case ACTION_FIELD_CLEAR_LOCKS: case ACTION_FIELD_LATCH_TO_LOCK: case ACTION_FIELD_MODIFIERS: return ReportActionNotArray(keymap, action->type, field); default: break; } } switch (field) { case ACTION_FIELD_CLEAR_LOCKS: case ACTION_FIELD_LATCH_TO_LOCK: rtrn = act->flags; if (CheckLatchLockFlags(keymap, action->type, field, value, &rtrn)) { act->flags = rtrn; return true; } return false; case ACTION_FIELD_MODIFIERS: t1 = act->flags; if (CheckModifierField(keymap, action->type, value, &t1, &t2)) { act->flags = t1; act->mods.mods = t2; return true; } return false; default: break; } return ReportIllegal(keymap, action->type, field); } static bool HandleLockMods(struct xkb_keymap *keymap, union xkb_action *action, enum action_field field, const ExprDef *array_ndx, const ExprDef *value) { struct xkb_mod_action *act = &action->mods; enum xkb_action_flags t1; xkb_mod_mask_t t2; if (array_ndx && field == ACTION_FIELD_MODIFIERS) return ReportActionNotArray(keymap, action->type, field); switch (field) { case ACTION_FIELD_MODIFIERS: t1 = act->flags; if (CheckModifierField(keymap, action->type, value, &t1, &t2)) { act->flags = t1; act->mods.mods = t2; return true; } return false; default: break; } return ReportIllegal(keymap, action->type, field); } static bool CheckGroupField(struct xkb_keymap *keymap, unsigned action, const ExprDef *value, enum xkb_action_flags *flags_inout, xkb_layout_index_t *grp_rtrn) { const ExprDef *spec; if (value->op == EXPR_NEGATE || value->op == EXPR_UNARY_PLUS) { *flags_inout &= ~ACTION_ABSOLUTE_SWITCH; spec = value->value.child; } else { *flags_inout |= ACTION_ABSOLUTE_SWITCH; spec = value; } if (!ExprResolveGroup(keymap->ctx, spec, grp_rtrn)) return ReportMismatch(keymap, action, ACTION_FIELD_GROUP, "integer (range 1..8)"); if (value->op == EXPR_NEGATE) *grp_rtrn = -*grp_rtrn; else if (value->op != EXPR_UNARY_PLUS) (*grp_rtrn)--; return true; } static bool HandleSetLatchGroup(struct xkb_keymap *keymap, union xkb_action *action, enum action_field field, const ExprDef *array_ndx, const ExprDef *value) { struct xkb_group_action *act = &action->group; enum xkb_action_flags rtrn, t1; xkb_layout_index_t t2; if (array_ndx != NULL) { switch (field) { case ACTION_FIELD_CLEAR_LOCKS: case ACTION_FIELD_LATCH_TO_LOCK: case ACTION_FIELD_GROUP: return ReportActionNotArray(keymap, action->type, field); default: break; } } switch (field) { case ACTION_FIELD_CLEAR_LOCKS: case ACTION_FIELD_LATCH_TO_LOCK: rtrn = act->flags; if (CheckLatchLockFlags(keymap, action->type, field, value, &rtrn)) { act->flags = rtrn; return true; } return false; case ACTION_FIELD_GROUP: t1 = act->flags; if (CheckGroupField(keymap, action->type, value, &t1, &t2)) { act->flags = t1; act->group = t2; return true; } return false; default: break; } return ReportIllegal(keymap, action->type, field); } static bool HandleLockGroup(struct xkb_keymap *keymap, union xkb_action *action, enum action_field field, const ExprDef *array_ndx, const ExprDef *value) { struct xkb_group_action *act = &action->group; enum xkb_action_flags t1; xkb_layout_index_t t2; if ((array_ndx != NULL) && (field == ACTION_FIELD_GROUP)) return ReportActionNotArray(keymap, action->type, field); if (field == ACTION_FIELD_GROUP) { t1 = act->flags; if (CheckGroupField(keymap, action->type, value, &t1, &t2)) { act->flags = t1; act->group = t2; return true; } return false; } return ReportIllegal(keymap, action->type, field); } static bool HandleMovePtr(struct xkb_keymap *keymap, union xkb_action *action, enum action_field field, const ExprDef *array_ndx, const ExprDef *value) { struct xkb_pointer_action *act = &action->ptr; bool absolute; if (array_ndx && (field == ACTION_FIELD_X || field == ACTION_FIELD_Y)) return ReportActionNotArray(keymap, action->type, field); if (field == ACTION_FIELD_X || field == ACTION_FIELD_Y) { int val; if (value->op == EXPR_NEGATE || value->op == EXPR_UNARY_PLUS) absolute = false; else absolute = true; if (!ExprResolveInteger(keymap->ctx, value, &val)) return ReportMismatch(keymap, action->type, field, "integer"); if (field == ACTION_FIELD_X) { if (absolute) act->flags |= ACTION_ABSOLUTE_X; act->x = val; } else { if (absolute) act->flags |= ACTION_ABSOLUTE_Y; act->y = val; } return true; } else if (field == ACTION_FIELD_ACCEL) { bool set; if (!ExprResolveBoolean(keymap->ctx, value, &set)) return ReportMismatch(keymap, action->type, field, "boolean"); if (set) act->flags &= ~ACTION_NO_ACCEL; else act->flags |= ACTION_NO_ACCEL; } return ReportIllegal(keymap, action->type, field); } static const LookupEntry lockWhich[] = { { "both", 0 }, { "lock", ACTION_LOCK_NO_UNLOCK }, { "neither", (ACTION_LOCK_NO_LOCK | ACTION_LOCK_NO_UNLOCK) }, { "unlock", ACTION_LOCK_NO_LOCK }, { NULL, 0 } }; static bool HandlePtrBtn(struct xkb_keymap *keymap, union xkb_action *action, enum action_field field, const ExprDef *array_ndx, const ExprDef *value) { struct xkb_pointer_button_action *act = &action->btn; if (field == ACTION_FIELD_BUTTON) { int btn; if (array_ndx) return ReportActionNotArray(keymap, action->type, field); if (!ExprResolveButton(keymap->ctx, value, &btn)) return ReportMismatch(keymap, action->type, field, "integer (range 1..5)"); if (btn < 0 || btn > 5) { log_err(keymap->ctx, "Button must specify default or be in the range 1..5; " "Illegal button value %d ignored\n", btn); return false; } act->button = btn; return true; } else if (action->type == ACTION_TYPE_PTR_LOCK && field == ACTION_FIELD_AFFECT) { enum xkb_action_flags val; if (array_ndx) return ReportActionNotArray(keymap, action->type, field); if (!ExprResolveEnum(keymap->ctx, value, &val, lockWhich)) return ReportMismatch(keymap, action->type, field, "lock or unlock"); act->flags &= ~(ACTION_LOCK_NO_LOCK | ACTION_LOCK_NO_UNLOCK); act->flags |= val; return true; } else if (field == ACTION_FIELD_COUNT) { int btn; if (array_ndx) return ReportActionNotArray(keymap, action->type, field); /* XXX: Should this actually be ResolveButton? */ if (!ExprResolveButton(keymap->ctx, value, &btn)) return ReportMismatch(keymap, action->type, field, "integer"); if (btn < 0 || btn > 255) { log_err(keymap->ctx, "The count field must have a value in the range 0..255; " "Illegal count %d ignored\n", btn); return false; } act->count = btn; return true; } return ReportIllegal(keymap, action->type, field); } static const LookupEntry ptrDflts[] = { { "dfltbtn", 1 }, { "defaultbutton", 1 }, { "button", 1 }, { NULL, 0 } }; static bool HandleSetPtrDflt(struct xkb_keymap *keymap, union xkb_action *action, enum action_field field, const ExprDef *array_ndx, const ExprDef *value) { struct xkb_pointer_default_action *act = &action->dflt; if (field == ACTION_FIELD_AFFECT) { unsigned int val; if (array_ndx) return ReportActionNotArray(keymap, action->type, field); if (!ExprResolveEnum(keymap->ctx, value, &val, ptrDflts)) return ReportMismatch(keymap, action->type, field, "pointer component"); return true; } else if (field == ACTION_FIELD_BUTTON || field == ACTION_FIELD_VALUE) { const ExprDef *button; int btn; if (array_ndx) return ReportActionNotArray(keymap, action->type, field); if (value->op == EXPR_NEGATE || value->op == EXPR_UNARY_PLUS) { act->flags &= ~ACTION_ABSOLUTE_SWITCH; button = value->value.child; } else { act->flags |= ACTION_ABSOLUTE_SWITCH; button = value; } if (!ExprResolveButton(keymap->ctx, button, &btn)) return ReportMismatch(keymap, action->type, field, "integer (range 1..5)"); if (btn < 0 || btn > 5) { log_err(keymap->ctx, "New default button value must be in the range 1..5; " "Illegal default button value %d ignored\n", btn); return false; } if (btn == 0) { log_err(keymap->ctx, "Cannot set default pointer button to \"default\"; " "Illegal default button setting ignored\n"); return false; } act->value = (value->op == EXPR_NEGATE ? -btn: btn); return true; } return ReportIllegal(keymap, action->type, field); } static bool HandleSwitchScreen(struct xkb_keymap *keymap, union xkb_action *action, enum action_field field, const ExprDef *array_ndx, const ExprDef *value) { struct xkb_switch_screen_action *act = &action->screen; if (field == ACTION_FIELD_SCREEN) { const ExprDef *scrn; int val; if (array_ndx) return ReportActionNotArray(keymap, action->type, field); if (value->op == EXPR_NEGATE || value->op == EXPR_UNARY_PLUS) { act->flags &= ~ACTION_ABSOLUTE_SWITCH; scrn = value->value.child; } else { act->flags |= ACTION_ABSOLUTE_SWITCH; scrn = value; } if (!ExprResolveInteger(keymap->ctx, scrn, &val)) return ReportMismatch(keymap, action->type, field, "integer (0..255)"); if (val < 0 || val > 255) { log_err(keymap->ctx, "Screen index must be in the range 1..255; " "Illegal screen value %d ignored\n", val); return false; } act->screen = (value->op == EXPR_NEGATE ? -val : val); return true; } else if (field == ACTION_FIELD_SAME) { bool set; if (array_ndx) return ReportActionNotArray(keymap, action->type, field); if (!ExprResolveBoolean(keymap->ctx, value, &set)) return ReportMismatch(keymap, action->type, field, "boolean"); if (set) act->flags &= ~ACTION_SAME_SCREEN; else act->flags |= ACTION_SAME_SCREEN; return true; } return ReportIllegal(keymap, action->type, field); } static bool HandleSetLockControls(struct xkb_keymap *keymap, union xkb_action *action, enum action_field field, const ExprDef *array_ndx, const ExprDef *value) { struct xkb_controls_action *act = &action->ctrls; if (field == ACTION_FIELD_CONTROLS) { unsigned int mask; if (array_ndx) return ReportActionNotArray(keymap, action->type, field); if (!ExprResolveMask(keymap->ctx, value, &mask, ctrlMaskNames)) return ReportMismatch(keymap, action->type, field, "controls mask"); act->ctrls = mask; return true; } return ReportIllegal(keymap, action->type, field); } static bool HandlePrivate(struct xkb_keymap *keymap, union xkb_action *action, enum action_field field, const ExprDef *array_ndx, const ExprDef *value) { struct xkb_private_action *act = &action->priv; if (field == ACTION_FIELD_TYPE) { int type; if (!ExprResolveInteger(keymap->ctx, value, &type)) return ReportMismatch(keymap, ACTION_TYPE_PRIVATE, field, "integer"); if (type < 0 || type > 255) { log_err(keymap->ctx, "Private action type must be in the range 0..255; " "Illegal type %d ignored\n", type); return false; } /* * It's possible for someone to write something like this: * actions = [ Private(type=3,data[0]=1,data[1]=3,data[2]=3) ] * where the type refers to some existing action type, e.g. LockMods. * This assumes that this action's struct is laid out in memory * exactly as described in the XKB specification and libraries. * We, however, have changed these structs in various ways, so this * assumption is no longer true. Since this is a lousy "feature", we * make actions like these no-ops for now. */ if (type < ACTION_TYPE_PRIVATE) { log_info(keymap->ctx, "Private actions of type %s are not supported; Ignored\n", ActionTypeText(type)); act->type = ACTION_TYPE_NONE; } else { act->type = (enum xkb_action_type) type; } return true; } else if (field == ACTION_FIELD_DATA) { if (array_ndx == NULL) { xkb_atom_t val; const char *str; int len; if (!ExprResolveString(keymap->ctx, value, &val)) return ReportMismatch(keymap, action->type, field, "string"); str = xkb_atom_text(keymap->ctx, val); len = strlen(str); if (len < 1 || len > 7) { log_warn(keymap->ctx, "A private action has 7 data bytes; " "Extra %d bytes ignored\n", len - 6); return false; } strncpy((char *) act->data, str, sizeof(act->data)); return true; } else { int ndx, datum; if (!ExprResolveInteger(keymap->ctx, array_ndx, &ndx)) { log_err(keymap->ctx, "Array subscript must be integer; " "Illegal subscript ignored\n"); return false; } if (ndx < 0 || ndx >= sizeof(act->data)) { log_err(keymap->ctx, "The data for a private action is %lu bytes long; " "Attempt to use data[%d] ignored\n", (unsigned long) sizeof(act->data), ndx); return false; } if (!ExprResolveInteger(keymap->ctx, value, &datum)) return ReportMismatch(keymap, act->type, field, "integer"); if (datum < 0 || datum > 255) { log_err(keymap->ctx, "All data for a private action must be 0..255; " "Illegal datum %d ignored\n", datum); return false; } act->data[ndx] = (uint8_t) datum; return true; } } return ReportIllegal(keymap, ACTION_TYPE_NONE, field); } typedef bool (*actionHandler)(struct xkb_keymap *keymap, union xkb_action *action, enum action_field field, const ExprDef *array_ndx, const ExprDef *value); static const actionHandler handleAction[_ACTION_TYPE_NUM_ENTRIES] = { [ACTION_TYPE_NONE] = HandleNoAction, [ACTION_TYPE_MOD_SET] = HandleSetLatchMods, [ACTION_TYPE_MOD_LATCH] = HandleSetLatchMods, [ACTION_TYPE_MOD_LOCK] = HandleLockMods, [ACTION_TYPE_GROUP_SET] = HandleSetLatchGroup, [ACTION_TYPE_GROUP_LATCH] = HandleSetLatchGroup, [ACTION_TYPE_GROUP_LOCK] = HandleLockGroup, [ACTION_TYPE_PTR_MOVE] = HandleMovePtr, [ACTION_TYPE_PTR_BUTTON] = HandlePtrBtn, [ACTION_TYPE_PTR_LOCK] = HandlePtrBtn, [ACTION_TYPE_PTR_DEFAULT] = HandleSetPtrDflt, [ACTION_TYPE_TERMINATE] = HandleNoAction, [ACTION_TYPE_SWITCH_VT] = HandleSwitchScreen, [ACTION_TYPE_CTRL_SET] = HandleSetLockControls, [ACTION_TYPE_CTRL_LOCK] = HandleSetLockControls, [ACTION_TYPE_PRIVATE] = HandlePrivate, }; /***====================================================================***/ bool HandleActionDef(ExprDef *def, struct xkb_keymap *keymap, union xkb_action *action, ActionsInfo *info) { ExprDef *arg; const char *str; unsigned handler_type; if (def->op != EXPR_ACTION_DECL) { log_err(keymap->ctx, "Expected an action definition, found %s\n", expr_op_type_to_string(def->op)); return false; } str = xkb_atom_text(keymap->ctx, def->value.action.name); if (!stringToAction(str, &handler_type)) { log_err(keymap->ctx, "Unknown action %s\n", str); return false; } /* * Get the default values for this action type, as modified by * statements such as: * latchMods.clearLocks = True; */ *action = info->actions[handler_type]; /* * Now change the action properties as specified for this * particular instance, e.g. "modifiers" and "clearLocks" in: * SetMods(modifiers=Alt,clearLocks); */ for (arg = def->value.action.args; arg != NULL; arg = (ExprDef *) arg->common.next) { const ExprDef *value; ExprDef *field, *arrayRtrn; const char *elemRtrn, *fieldRtrn; enum action_field fieldNdx; if (arg->op == EXPR_ASSIGN) { field = arg->value.binary.left; value = arg->value.binary.right; } else if (arg->op == EXPR_NOT || arg->op == EXPR_INVERT) { field = arg->value.child; value = &constFalse; } else { field = arg; value = &constTrue; } if (!ExprResolveLhs(keymap->ctx, field, &elemRtrn, &fieldRtrn, &arrayRtrn)) return false; if (elemRtrn) { log_err(keymap->ctx, "Cannot change defaults in an action definition; " "Ignoring attempt to change %s.%s\n", elemRtrn, fieldRtrn); return false; } if (!stringToField(fieldRtrn, &fieldNdx)) { log_err(keymap->ctx, "Unknown field name %s\n", fieldRtrn); return false; } if (!handleAction[handler_type](keymap, action, fieldNdx, arrayRtrn, value)) return false; } return true; } bool SetActionField(struct xkb_keymap *keymap, const char *elem, const char *field, ExprDef *array_ndx, ExprDef *value, ActionsInfo *info) { unsigned action; enum action_field action_field; if (!stringToAction(elem, &action)) return false; if (!stringToField(field, &action_field)) { log_err(keymap->ctx, "\"%s\" is not a legal field name\n", field); return false; } return handleAction[action](keymap, &info->actions[action], action_field, array_ndx, value); }