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