diff options
Diffstat (limited to 'lexers/LexCoffeeScript.cxx')
| -rw-r--r-- | lexers/LexCoffeeScript.cxx | 72 |
1 files changed, 71 insertions, 1 deletions
diff --git a/lexers/LexCoffeeScript.cxx b/lexers/LexCoffeeScript.cxx index f32560016..63ee172e2 100644 --- a/lexers/LexCoffeeScript.cxx +++ b/lexers/LexCoffeeScript.cxx @@ -40,6 +40,36 @@ static bool IsSpaceEquiv(int state) { || state == SCE_COFFEESCRIPT_REGEX); } +// Store the current lexer state and brace count prior to starting a new +// `#{}` interpolation level. +// Based on LexRuby.cxx. +static void enterInnerExpression(int *p_inner_string_types, + int *p_inner_expn_brace_counts, + int& inner_string_count, + int state, + int& brace_counts + ) { + p_inner_string_types[inner_string_count] = state; + p_inner_expn_brace_counts[inner_string_count] = brace_counts; + brace_counts = 0; + ++inner_string_count; +} + +// Restore the lexer state and brace count for the previous `#{}` interpolation +// level upon returning to it. +// Note the previous lexer state is the return value and needs to be restored +// manually by the StyleContext. +// Based on LexRuby.cxx. +static int exitInnerExpression(int *p_inner_string_types, + int *p_inner_expn_brace_counts, + int& inner_string_count, + int& brace_counts + ) { + --inner_string_count; + brace_counts = p_inner_expn_brace_counts[inner_string_count]; + return p_inner_string_types[inner_string_count]; +} + // Preconditions: sc.currentPos points to a character after '+' or '-'. // The test for pos reaching 0 should be redundant, // and is in only for safety measures. @@ -88,6 +118,27 @@ static void ColouriseCoffeeScriptDoc(Sci_PositionU startPos, Sci_Position length int chPrevNonWhite = ' '; int visibleChars = 0; + // String/Regex interpolation variables, based on LexRuby.cxx. + // In most cases a value of 2 should be ample for the code the user is + // likely to enter. For example, + // "Filling the #{container} with #{liquid}..." + // from the CoffeeScript homepage nests to a level of 2 + // If the user actually hits a 6th occurrence of '#{' in a double-quoted + // string (including regexes), it will stay as a string. The problem with + // this is that quotes might flip, a 7th '#{' will look like a comment, + // and code-folding might be wrong. +#define INNER_STRINGS_MAX_COUNT 5 + // These vars track our instances of "...#{,,,'..#{,,,}...',,,}..." + int inner_string_types[INNER_STRINGS_MAX_COUNT]; + // Track # braces when we push a new #{ thing + int inner_expn_brace_counts[INNER_STRINGS_MAX_COUNT]; + int inner_string_count = 0; + int brace_counts = 0; // Number of #{ ... } things within an expression + for (int i = 0; i < INNER_STRINGS_MAX_COUNT; i++) { + inner_string_types[i] = 0; + inner_expn_brace_counts[i] = 0; + } + // look back to set chPrevNonWhite properly for better regex colouring Sci_Position endPos = startPos + length; if (startPos > 0 && IsSpaceEquiv(initStyle)) { @@ -109,7 +160,7 @@ static void ColouriseCoffeeScriptDoc(Sci_PositionU startPos, Sci_Position length StyleContext sc(startPos, endPos - startPos, initStyle, styler); - for (; sc.More(); sc.Forward()) { + for (; sc.More();) { if (sc.atLineStart) { // Reset states to beginning of colourise so no surprises @@ -164,6 +215,15 @@ static void ColouriseCoffeeScriptDoc(Sci_PositionU startPos, Sci_Position length } } else if (sc.ch == '\"') { sc.ForwardSetState(SCE_COFFEESCRIPT_DEFAULT); + } else if (sc.ch == '#' && sc.chNext == '{' && inner_string_count < INNER_STRINGS_MAX_COUNT) { + // process interpolated code #{ ... } + enterInnerExpression(inner_string_types, + inner_expn_brace_counts, + inner_string_count, + sc.state, + brace_counts); + sc.SetState(SCE_COFFEESCRIPT_OPERATOR); + sc.ForwardSetState(SCE_COFFEESCRIPT_DEFAULT); } break; case SCE_COFFEESCRIPT_CHARACTER: @@ -255,6 +315,15 @@ static void ColouriseCoffeeScriptDoc(Sci_PositionU startPos, Sci_Position length // Handle '..' and '...' operators correctly. if (sc.ch == '.') { for (int i = 0; i < 2 && sc.chNext == '.'; i++, sc.Forward()) ; + } else if (sc.ch == '{') { + ++brace_counts; + } else if (sc.ch == '}' && --brace_counts <= 0 && inner_string_count > 0) { + // Return to previous state before #{ ... } + sc.ForwardSetState(exitInnerExpression(inner_string_types, + inner_expn_brace_counts, + inner_string_count, + brace_counts)); + continue; // skip sc.Forward() at loop end } } } @@ -263,6 +332,7 @@ static void ColouriseCoffeeScriptDoc(Sci_PositionU startPos, Sci_Position length chPrevNonWhite = sc.ch; visibleChars++; } + sc.Forward(); } sc.Complete(); } |