kc3-lang/libxkbcommon/src/context-priv.c

Branch : - branch - android master - tag -

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• Author : Pierre Le Marre
  Date : 2025-06-16 15:48:25
  Hash : ef6a550f
  Message : Add xkb_keymap_new_from_rmlvo() Use the new RMLVO builder API to compile keymaps.

• src/context-priv.c

• /*
   * Copyright © 2012 Intel Corporation
   * Copyright © 2012 Ran Benita
   * SPDX-License-Identifier: MIT
   *
   * Author: Daniel Stone <daniel@fooishbar.org>
   */
  
  #include "config.h"
  
  #include <sys/types.h>
  #include <sys/stat.h>
  #include <errno.h>
  
  #include "xkbcommon/xkbcommon.h"
  #include "darray.h"
  #include "context.h"
  #include "rmlvo.h"
  #include "utils.h"
  
  char *
  xkb_context_getenv(struct xkb_context *ctx, const char *name)
  {
      if (ctx->use_secure_getenv) {
          return secure_getenv(name);
      } else {
          return getenv(name);
      }
  }
  
  darray_size_t
  xkb_context_num_failed_include_paths(struct xkb_context *ctx)
  {
      return darray_size(ctx->failed_includes);
  }
  
  const char *
  xkb_context_failed_include_path_get(struct xkb_context *ctx,
                                      darray_size_t idx)
  {
      if (idx >= xkb_context_num_failed_include_paths(ctx))
          return NULL;
  
      return darray_item(ctx->failed_includes, idx);
  }
  
  xkb_atom_t
  xkb_atom_lookup(struct xkb_context *ctx, const char *string)
  {
      return atom_intern(ctx->atom_table, string, strlen(string), false);
  }
  
  xkb_atom_t
  xkb_atom_intern(struct xkb_context *ctx, const char *string, size_t len)
  {
      return atom_intern(ctx->atom_table, string, len, true);
  }
  
  const char *
  xkb_atom_text(struct xkb_context *ctx, xkb_atom_t atom)
  {
      return atom_text(ctx->atom_table, atom);
  }
  
  void
  xkb_log(struct xkb_context *ctx, enum xkb_log_level level, int verbosity,
          const char *fmt, ...)
  {
      va_list args;
  
      if (ctx->log_level < level || ctx->log_verbosity < verbosity)
          return;
  
      va_start(args, fmt);
      ctx->log_fn(ctx, level, fmt, args);
      va_end(args);
  }
  
  char *
  xkb_context_get_buffer(struct xkb_context *ctx, size_t size)
  {
      char *rtrn;
  
      if (size >= sizeof(ctx->text_buffer))
          return NULL;
  
      if (sizeof(ctx->text_buffer) - ctx->text_next <= size)
          ctx->text_next = 0;
  
      rtrn = &ctx->text_buffer[ctx->text_next];
      ctx->text_next += size;
  
      return rtrn;
  }
  
  static const char *
  xkb_context_get_default_rules(struct xkb_context *ctx)
  {
      const char *env = NULL;
  
      if (ctx->use_environment_names)
          env = xkb_context_getenv(ctx, "XKB_DEFAULT_RULES");
  
      return env ? env : DEFAULT_XKB_RULES;
  }
  
  static const char *
  xkb_context_get_default_model(struct xkb_context *ctx)
  {
      const char *env = NULL;
  
      if (ctx->use_environment_names)
          env = xkb_context_getenv(ctx, "XKB_DEFAULT_MODEL");
  
      return env ? env : DEFAULT_XKB_MODEL;
  }
  
  static const char *
  xkb_context_get_default_layout(struct xkb_context *ctx)
  {
      const char *env = NULL;
  
      if (ctx->use_environment_names)
          env = xkb_context_getenv(ctx, "XKB_DEFAULT_LAYOUT");
  
      return env ? env : DEFAULT_XKB_LAYOUT;
  }
  
  static const char *
  xkb_context_get_default_variant(struct xkb_context *ctx)
  {
      const char *env = NULL;
      const char *layout = xkb_context_getenv(ctx, "XKB_DEFAULT_LAYOUT");
  
      /* We don't want to inherit the variant if they haven't also set a
       * layout, since they're so closely paired. */
      if (layout && ctx->use_environment_names)
          env = xkb_context_getenv(ctx, "XKB_DEFAULT_VARIANT");
  
      return env ? env : DEFAULT_XKB_VARIANT;
  }
  
  static const char *
  xkb_context_get_default_options(struct xkb_context *ctx)
  {
      const char *env = NULL;
  
      if (ctx->use_environment_names)
          env = xkb_context_getenv(ctx, "XKB_DEFAULT_OPTIONS");
  
      return env ? env : DEFAULT_XKB_OPTIONS;
  }
  
  enum RMLVO
  xkb_context_sanitize_rule_names(struct xkb_context *ctx,
                                  struct xkb_rule_names *rmlvo)
  {
      enum RMLVO modified = 0;
  
      if (isempty(rmlvo->rules)) {
          rmlvo->rules = xkb_context_get_default_rules(ctx);
          modified |= RMLVO_RULES;
      }
      if (isempty(rmlvo->model)) {
          rmlvo->model = xkb_context_get_default_model(ctx);
          modified |= RMLVO_MODEL;
      }
      /* Layout and variant are tied together, so don't try to use one from
       * the caller and one from the environment. */
      if (isempty(rmlvo->layout)) {
          rmlvo->layout = xkb_context_get_default_layout(ctx);
          modified |= RMLVO_LAYOUT;
          const char * const variant = xkb_context_get_default_variant(ctx);
          if (!isempty(rmlvo->variant)) {
              log_warn(ctx, XKB_LOG_MESSAGE_NO_ID,
                       "Layout not provided, but variant set to \"%s\": "
                       "ignoring variant and using defaults for both: "
                       "layout=\"%s\", variant=\"%s\".\n",
                       rmlvo->variant,
                       rmlvo->layout,
                       variant ? variant : "");
          }
          rmlvo->variant = variant;
          modified |= RMLVO_VARIANT;
      }
      /* Options can be empty, so respect that if passed in. */
      if (rmlvo->options == NULL) {
          rmlvo->options = xkb_context_get_default_options(ctx);
          modified |= RMLVO_OPTIONS;
      }
  
      return modified;
  }