diff options
Diffstat (limited to 'parser.cpp')
| -rw-r--r-- | parser.cpp | 108 |
1 files changed, 106 insertions, 2 deletions
@@ -1,3 +1,5 @@ +#include <string.h> + #include <glib.h> #include <glib/gprintf.h> @@ -26,6 +28,8 @@ static gint nest_level = 0; gchar *strings[2] = {NULL, NULL}; +static gchar escape_char = '\x1B'; + bool macro_execute(const gchar *macro) { @@ -101,6 +105,63 @@ State::get_next_state(gchar chr) return next; } +State * +StateExpectString::custom(gchar chr) +{ + gchar insert[255]; + gchar *new_str; + + if (chr == '\0') { + BEGIN_EXEC(this); + initial(); + return this; + } + + /* + * String termination handling + */ + if (modifiers.at) { + undo.push_var<bool>(modifiers.at); + modifiers.at = false; + undo.push_var<gchar>(escape_char); + escape_char = g_ascii_toupper(chr); + + return this; + } + + if (g_ascii_toupper(chr) == escape_char) { + State *next = done(strings[0]); + + undo.push_var<gchar>(escape_char); + escape_char = '\x1B'; + undo.push_str(strings[0]); + g_free(strings[0]); + strings[0] = NULL; + /* TODO: save and reset string building machine state */ + + return next; + } + + /* + * String building characters + */ + /* TODO */ + insert[0] = chr; + insert[1] = '\0'; + + /* + * String accumulation + */ + undo.push_str(strings[0]); + new_str = g_strconcat(strings[0] ? : "", insert, NULL); + g_free(strings[0]); + strings[0] = new_str; + + BEGIN_EXEC(this); + process(strings[0], strlen(insert)); + return this; +} + StateStart::StateStart() : State() { transitions['\0'] = this; @@ -108,6 +169,7 @@ StateStart::StateStart() : State() transitions['!'] = &states.label; transitions['^'] = &states.control; + transitions['I'] = &states.insert; } void @@ -448,7 +510,6 @@ StateControl::custom(gchar chr) expressions.set_radix(expressions.pop_num_calc()); break; -#if 0 /* * Alternatives: ^i, ^I, <CTRL/I>, <TAB> */ @@ -457,7 +518,6 @@ StateControl::custom(gchar chr) expressions.eval(); expressions.push('\t'); return &states.insert; -#endif /* * Alternatives: ^[, <CTRL/[>, <ESC> @@ -491,3 +551,47 @@ StateControl::custom(gchar chr) return &states.start; } + +/* + * NOTE: cannot support VideoTECO's <n>I because + * beginning and end of strings must be determined + * syntactically + */ +void +StateInsert::initial(void) +{ + int args; + + expressions.eval(); + args = expressions.args(); + if (!args) + return; + + editor_msg(SCI_BEGINUNDOACTION); + for (int i = args; i > 0; i--) { + /* FIXME: if possible prevent pops with index != 1 */ + gchar chr = (gchar)expressions.pop_num_calc(i); + editor_msg(SCI_ADDTEXT, 1, (sptr_t)&chr); + } + editor_msg(SCI_ENDUNDOACTION); + + undo.push_msg(SCI_UNDO); +} + +void +StateInsert::process(const gchar *str, gint new_chars) +{ + editor_msg(SCI_BEGINUNDOACTION); + editor_msg(SCI_ADDTEXT, new_chars, + (sptr_t)str + strlen(str) - new_chars); + editor_msg(SCI_ENDUNDOACTION); + + undo.push_msg(SCI_UNDO); +} + +State * +StateInsert::done(const gchar *str __attribute__((unused))) +{ + /* nothing to be done when done */ + return &states.start; +} |