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Diffstat (limited to 'src/3rdparty/xkbcommon/src/xkbcomp/action.c')
| -rw-r--r-- | src/3rdparty/xkbcommon/src/xkbcomp/action.c | 951 |
1 files changed, 951 insertions, 0 deletions
diff --git a/src/3rdparty/xkbcommon/src/xkbcomp/action.c b/src/3rdparty/xkbcommon/src/xkbcomp/action.c new file mode 100644 index 0000000000..88323f9952 --- /dev/null +++ b/src/3rdparty/xkbcommon/src/xkbcomp/action.c @@ -0,0 +1,951 @@ +/************************************************************ + * 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); +} |