kc3-lang/harfbuzz/util/view-options.hh

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• Hash : 91a174f1
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  Date : 2023-01-24T11:27:35
  

  [hb-view] Hide --annotate and make it alias for --show-extents
  

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• util/view-options.hh

• /*
   * Copyright © 2011  Google, Inc.
   *
   *  This is part of HarfBuzz, a text shaping library.
   *
   * Permission is hereby granted, without written agreement and without
   * license or royalty fees, to use, copy, modify, and distribute this
   * software and its documentation for any purpose, provided that the
   * above copyright notice and the following two paragraphs appear in
   * all copies of this software.
   *
   * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
   * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
   * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
   * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
   * DAMAGE.
   *
   * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
   * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
   * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
   * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
   * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
   *
   * Google Author(s): Behdad Esfahbod
   */
  
  #ifndef VIEW_OPTIONS_HH
  #define VIEW_OPTIONS_HH
  
  #include "options.hh"
  
  #define DEFAULT_MARGIN 16
  #define DEFAULT_FORE "#000000"
  #define DEFAULT_BACK "#FFFFFF"
  
  struct view_options_t
  {
    ~view_options_t ()
    {
      g_free (fore);
      g_free (back);
      g_free (custom_palette);
    }
  
    void add_options (option_parser_t *parser);
  
    char *fore = nullptr;
    char *back = nullptr;
    unsigned int palette = 0;
    char *custom_palette = nullptr;
    double line_space = 0;
    bool have_font_extents = false;
    struct font_extents_t {
      double ascent, descent, line_gap;
    } font_extents = {0., 0., 0.};
    struct margin_t {
      double t, r, b, l;
    } margin = {DEFAULT_MARGIN, DEFAULT_MARGIN, DEFAULT_MARGIN, DEFAULT_MARGIN};
    hb_bool_t show_extents = false;
  };
  
  
  static gboolean
  parse_font_extents (const char *name G_GNUC_UNUSED,
  		    const char *arg,
  		    gpointer    data,
  		    GError    **error G_GNUC_UNUSED)
  {
    view_options_t *view_opts = (view_options_t *) data;
    view_options_t::font_extents_t &e = view_opts->font_extents;
    switch (sscanf (arg, "%lf%*[ ,]%lf%*[ ,]%lf", &e.ascent, &e.descent, &e.line_gap)) {
      case 1: HB_FALLTHROUGH;
      case 2: HB_FALLTHROUGH;
      case 3:
        view_opts->have_font_extents = true;
        return true;
      default:
        g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
  		   "%s argument should be one to three space-separated numbers",
  		   name);
        return false;
    }
  }
  
  static gboolean
  parse_margin (const char *name G_GNUC_UNUSED,
  	      const char *arg,
  	      gpointer    data,
  	      GError    **error G_GNUC_UNUSED)
  {
    view_options_t *view_opts = (view_options_t *) data;
    view_options_t::margin_t &m = view_opts->margin;
    switch (sscanf (arg, "%lf%*[ ,]%lf%*[ ,]%lf%*[ ,]%lf", &m.t, &m.r, &m.b, &m.l)) {
      case 1: m.r = m.t; HB_FALLTHROUGH;
      case 2: m.b = m.t; HB_FALLTHROUGH;
      case 3: m.l = m.r; HB_FALLTHROUGH;
      case 4: return true;
      default:
        g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
  		   "%s argument should be one to four space-separated numbers",
  		   name);
        return false;
    }
  }
  
  void
  view_options_t::add_options (option_parser_t *parser)
  {
    GOptionEntry entries[] =
    {
      {"annotate",	0, G_OPTION_FLAG_HIDDEN,
  			      G_OPTION_ARG_NONE,	&this->show_extents,		"Annotate output rendering",				nullptr},
      {"background",	0, 0, G_OPTION_ARG_STRING,	&this->back,			"Set background color (default: " DEFAULT_BACK ")",	"rrggbb/rrggbbaa"},
      {"foreground",	0, 0, G_OPTION_ARG_STRING,	&this->fore,			"Set foreground color (default: " DEFAULT_FORE ")",	"rrggbb/rrggbbaa"},
      {"font-palette",    0, 0, G_OPTION_ARG_INT,         &this->palette,                 "Set font palette (default: 0)",                "index"},
      {"custom-palette",  0, 0, G_OPTION_ARG_STRING,      &this->custom_palette,          "Custom palette",                               "comma-separated colors"},
      {"line-space",	0, 0, G_OPTION_ARG_DOUBLE,	&this->line_space,		"Set space between lines (default: 0)",			"units"},
      {"font-extents",	0, 0, G_OPTION_ARG_CALLBACK,	(gpointer) &parse_font_extents,	"Set font ascent/descent/line-gap (default: auto)","one to three numbers"},
      {"margin",		0, 0, G_OPTION_ARG_CALLBACK,	(gpointer) &parse_margin,	"Margin around output (default: " G_STRINGIFY(DEFAULT_MARGIN) ")","one to four numbers"},
      {"show-extents",	0, 0, G_OPTION_ARG_NONE,	&this->show_extents,		"Draw glyph extents",							nullptr},
      {nullptr}
    };
    parser->add_group (entries,
  		     "view",
  		     "View options:",
  		     "Options for output rendering",
  		     this);
  }
  
  #endif
  

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