diff options
Diffstat (limited to 'scintilla/src/LexMarkdown.cxx')
| -rw-r--r-- | scintilla/src/LexMarkdown.cxx | 412 |
1 files changed, 0 insertions, 412 deletions
diff --git a/scintilla/src/LexMarkdown.cxx b/scintilla/src/LexMarkdown.cxx deleted file mode 100644 index 9e69b31..0000000 --- a/scintilla/src/LexMarkdown.cxx +++ /dev/null @@ -1,412 +0,0 @@ -/******************************************************************
- * LexMarkdown.cxx
- *
- * A simple Markdown lexer for scintilla.
- *
- * Includes highlighting for some extra features from the
- * Pandoc implementation; strikeout, using '#.' as a default
- * ordered list item marker, and delimited code blocks.
- *
- * Limitations:
- *
- * Standard indented code blocks are not highlighted at all,
- * as it would conflict with other indentation schemes. Use
- * delimited code blocks for blanket highlighting of an
- * entire code block. Embedded HTML is not highlighted either.
- * Blanket HTML highlighting has issues, because some Markdown
- * implementations allow Markdown markup inside of the HTML. Also,
- * there is a following blank line issue that can't be ignored,
- * explained in the next paragraph. Embedded HTML and code
- * blocks would be better supported with language specific
- * highlighting.
- *
- * The highlighting aims to accurately reflect correct syntax,
- * but a few restrictions are relaxed. Delimited code blocks are
- * highlighted, even if the line following the code block is not blank.
- * Requiring a blank line after a block, breaks the highlighting
- * in certain cases, because of the way Scintilla ends up calling
- * the lexer.
- *
- * Written by Jon Strait - jstrait@moonloop.net
- *
- * The License.txt file describes the conditions under which this
- * software may be distributed.
- *
- *****************************************************************/
-
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-#include <stdio.h>
-#include <stdarg.h>
-
-#include "Platform.h"
-
-#include "PropSet.h"
-#include "Accessor.h"
-#include "StyleContext.h"
-#include "KeyWords.h"
-#include "Scintilla.h"
-#include "SciLexer.h"
-
-#ifdef SCI_NAMESPACE
-using namespace Scintilla;
-#endif
-
-static inline bool IsNewline(const int ch) {
- return (ch == '\n' || ch == '\r');
-}
-
-// True if can follow ch down to the end with possibly trailing whitespace
-static bool FollowToLineEnd(const int ch, const int state, const unsigned int endPos, StyleContext &sc) {
- unsigned int i = 0;
- while (sc.GetRelative(++i) == ch)
- ;
- // Skip over whitespace
- while (IsASpaceOrTab(sc.GetRelative(i)) && sc.currentPos + i < endPos)
- ++i;
- if (IsNewline(sc.GetRelative(i)) || sc.currentPos + i == endPos) {
- sc.Forward(i);
- sc.ChangeState(state);
- sc.SetState(SCE_MARKDOWN_LINE_BEGIN);
- return true;
- }
- else return false;
-}
-
-// Set the state on text section from current to length characters,
-// then set the rest until the newline to default, except for any characters matching token
-static void SetStateAndZoom(const int state, const int length, const int token, StyleContext &sc) {
- sc.SetState(state);
- sc.Forward(length);
- sc.SetState(SCE_MARKDOWN_DEFAULT);
- sc.Forward();
- bool started = false;
- while (sc.More() && !IsNewline(sc.ch)) {
- if (sc.ch == token && !started) {
- sc.SetState(state);
- started = true;
- }
- else if (sc.ch != token) {
- sc.SetState(SCE_MARKDOWN_DEFAULT);
- started = false;
- }
- sc.Forward();
- }
- sc.SetState(SCE_MARKDOWN_LINE_BEGIN);
-}
-
-// Does the previous line have more than spaces and tabs?
-static bool HasPrevLineContent(StyleContext &sc) {
- int i = 0;
- // Go back to the previous newline
- while ((--i + sc.currentPos) && !IsNewline(sc.GetRelative(i)))
- ;
- while (--i + sc.currentPos) {
- if (IsNewline(sc.GetRelative(i)))
- break;
- if (!IsASpaceOrTab(sc.GetRelative(i)))
- return true;
- }
- return false;
-}
-
-static bool IsValidHrule(const unsigned int endPos, StyleContext &sc) {
- int c, count = 1;
- unsigned int i = 0;
- while (++i) {
- c = sc.GetRelative(i);
- if (c == sc.ch)
- ++count;
- // hit a terminating character
- else if (!IsASpaceOrTab(c) || sc.currentPos + i == endPos) {
- // Are we a valid HRULE
- if ((IsNewline(c) || sc.currentPos + i == endPos) &&
- count >= 3 && !HasPrevLineContent(sc)) {
- sc.SetState(SCE_MARKDOWN_HRULE);
- sc.Forward(i);
- sc.SetState(SCE_MARKDOWN_LINE_BEGIN);
- return true;
- }
- else {
- sc.SetState(SCE_MARKDOWN_DEFAULT);
- return false;
- }
- }
- }
- return false;
-}
-
-static void ColorizeMarkdownDoc(unsigned int startPos, int length, int initStyle,
- WordList **, Accessor &styler) {
- unsigned int endPos = startPos + length;
- int precharCount = 0;
- // Don't advance on a new loop iteration and retry at the same position.
- // Useful in the corner case of having to start at the beginning file position
- // in the default state.
- bool freezeCursor = false;
-
- StyleContext sc(startPos, length, initStyle, styler);
-
- while (sc.More()) {
- // Skip past escaped characters
- if (sc.ch == '\\') {
- sc.Forward();
- continue;
- }
-
- // A blockquotes resets the line semantics
- if (sc.state == SCE_MARKDOWN_BLOCKQUOTE)
- sc.SetState(SCE_MARKDOWN_LINE_BEGIN);
-
- // Conditional state-based actions
- if (sc.state == SCE_MARKDOWN_CODE2) {
- if (sc.Match("``") && sc.GetRelative(-2) != ' ') {
- sc.Forward(2);
- sc.SetState(SCE_MARKDOWN_DEFAULT);
- }
- }
- else if (sc.state == SCE_MARKDOWN_CODE) {
- if (sc.ch == '`' && sc.chPrev != ' ')
- sc.ForwardSetState(SCE_MARKDOWN_DEFAULT);
- }
- /* De-activated because it gets in the way of other valid indentation
- * schemes, for example multiple paragraphs inside a list item.
- // Code block
- else if (sc.state == SCE_MARKDOWN_CODEBK) {
- bool d = true;
- if (IsNewline(sc.ch)) {
- if (sc.chNext != '\t') {
- for (int c = 1; c < 5; ++c) {
- if (sc.GetRelative(c) != ' ')
- d = false;
- }
- }
- }
- else if (sc.atLineStart) {
- if (sc.ch != '\t' ) {
- for (int i = 0; i < 4; ++i) {
- if (sc.GetRelative(i) != ' ')
- d = false;
- }
- }
- }
- if (!d)
- sc.SetState(SCE_MARKDOWN_LINE_BEGIN);
- }
- */
- // Strong
- else if (sc.state == SCE_MARKDOWN_STRONG1) {
- if (sc.Match("**") && sc.chPrev != ' ') {
- sc.Forward(2);
- sc.SetState(SCE_MARKDOWN_DEFAULT);
- }
- }
- else if (sc.state == SCE_MARKDOWN_STRONG2) {
- if (sc.Match("__") && sc.chPrev != ' ') {
- sc.Forward(2);
- sc.SetState(SCE_MARKDOWN_DEFAULT);
- }
- }
- // Emphasis
- else if (sc.state == SCE_MARKDOWN_EM1) {
- if (sc.ch == '*' && sc.chPrev != ' ')
- sc.ForwardSetState(SCE_MARKDOWN_DEFAULT);
- }
- else if (sc.state == SCE_MARKDOWN_EM2) {
- if (sc.ch == '_' && sc.chPrev != ' ')
- sc.ForwardSetState(SCE_MARKDOWN_DEFAULT);
- }
- else if (sc.state == SCE_MARKDOWN_CODEBK) {
- if (sc.atLineStart && sc.Match("~~~")) {
- int i = 1;
- while (!IsNewline(sc.GetRelative(i)) && sc.currentPos + i < endPos)
- i++;
- sc.Forward(i);
- sc.SetState(SCE_MARKDOWN_DEFAULT);
- }
- }
- else if (sc.state == SCE_MARKDOWN_STRIKEOUT) {
- if (sc.Match("~~") && sc.chPrev != ' ') {
- sc.Forward(2);
- sc.SetState(SCE_MARKDOWN_DEFAULT);
- }
- }
- else if (sc.state == SCE_MARKDOWN_LINE_BEGIN) {
- // Header
- if (sc.Match("######"))
- SetStateAndZoom(SCE_MARKDOWN_HEADER6, 6, '#', sc);
- else if (sc.Match("#####"))
- SetStateAndZoom(SCE_MARKDOWN_HEADER5, 5, '#', sc);
- else if (sc.Match("####"))
- SetStateAndZoom(SCE_MARKDOWN_HEADER4, 4, '#', sc);
- else if (sc.Match("###"))
- SetStateAndZoom(SCE_MARKDOWN_HEADER3, 3, '#', sc);
- else if (sc.Match("##"))
- SetStateAndZoom(SCE_MARKDOWN_HEADER2, 2, '#', sc);
- else if (sc.Match("#")) {
- // Catch the special case of an unordered list
- if (sc.chNext == '.' && IsASpaceOrTab(sc.GetRelative(2))) {
- precharCount = 0;
- sc.SetState(SCE_MARKDOWN_PRECHAR);
- }
- else
- SetStateAndZoom(SCE_MARKDOWN_HEADER1, 1, '#', sc);
- }
- // Code block
- else if (sc.Match("~~~")) {
- if (!HasPrevLineContent(sc))
- sc.SetState(SCE_MARKDOWN_CODEBK);
- else
- sc.SetState(SCE_MARKDOWN_DEFAULT);
- }
- else if (sc.ch == '=') {
- if (HasPrevLineContent(sc) && FollowToLineEnd('=', SCE_MARKDOWN_HEADER1, endPos, sc))
- ;
- else
- sc.SetState(SCE_MARKDOWN_DEFAULT);
- }
- else if (sc.ch == '-') {
- if (HasPrevLineContent(sc) && FollowToLineEnd('-', SCE_MARKDOWN_HEADER2, endPos, sc))
- ;
- else {
- precharCount = 0;
- sc.SetState(SCE_MARKDOWN_PRECHAR);
- }
- }
- else if (IsNewline(sc.ch))
- sc.SetState(SCE_MARKDOWN_LINE_BEGIN);
- else {
- precharCount = 0;
- sc.SetState(SCE_MARKDOWN_PRECHAR);
- }
- }
-
- // The header lasts until the newline
- else if (sc.state == SCE_MARKDOWN_HEADER1 || sc.state == SCE_MARKDOWN_HEADER2 ||
- sc.state == SCE_MARKDOWN_HEADER3 || sc.state == SCE_MARKDOWN_HEADER4 ||
- sc.state == SCE_MARKDOWN_HEADER5 || sc.state == SCE_MARKDOWN_HEADER6) {
- if (IsNewline(sc.ch))
- sc.SetState(SCE_MARKDOWN_LINE_BEGIN);
- }
-
- // New state only within the initial whitespace
- if (sc.state == SCE_MARKDOWN_PRECHAR) {
- // Blockquote
- if (sc.ch == '>' && precharCount < 5)
- sc.SetState(SCE_MARKDOWN_BLOCKQUOTE);
- /*
- // Begin of code block
- else if (!HasPrevLineContent(sc) && (sc.chPrev == '\t' || precharCount >= 4))
- sc.SetState(SCE_MARKDOWN_CODEBK);
- */
- // HRule - Total of three or more hyphens, asterisks, or underscores
- // on a line by themselves
- else if ((sc.ch == '-' || sc.ch == '*' || sc.ch == '_') && IsValidHrule(endPos, sc))
- ;
- // Unordered list
- else if ((sc.ch == '-' || sc.ch == '*' || sc.ch == '+') && IsASpaceOrTab(sc.chNext)) {
- sc.SetState(SCE_MARKDOWN_ULIST_ITEM);
- sc.ForwardSetState(SCE_MARKDOWN_DEFAULT);
- }
- // Ordered list
- else if (IsADigit(sc.ch)) {
- int digitCount = 0;
- while (IsADigit(sc.GetRelative(++digitCount)))
- ;
- if (sc.GetRelative(digitCount) == '.' &&
- IsASpaceOrTab(sc.GetRelative(digitCount + 1))) {
- sc.SetState(SCE_MARKDOWN_OLIST_ITEM);
- sc.Forward(digitCount + 1);
- sc.SetState(SCE_MARKDOWN_DEFAULT);
- }
- }
- // Alternate Ordered list
- else if (sc.ch == '#' && sc.chNext == '.' && IsASpaceOrTab(sc.GetRelative(2))) {
- sc.SetState(SCE_MARKDOWN_OLIST_ITEM);
- sc.Forward(2);
- sc.SetState(SCE_MARKDOWN_DEFAULT);
- }
- else if (sc.ch != ' ' || precharCount > 2)
- sc.SetState(SCE_MARKDOWN_DEFAULT);
- else
- ++precharCount;
- }
-
- // New state anywhere in doc
- if (sc.state == SCE_MARKDOWN_DEFAULT) {
- if (sc.atLineStart && sc.ch == '#') {
- sc.SetState(SCE_MARKDOWN_LINE_BEGIN);
- freezeCursor = true;
- }
- // Links and Images
- if (sc.Match("![") || sc.ch == '[') {
- int i = 0, j = 0, k = 0;
- int len = endPos - sc.currentPos;
- while (i < len && (sc.GetRelative(++i) != ']' || sc.GetRelative(i - 1) == '\\'))
- ;
- if (sc.GetRelative(i) == ']') {
- j = i;
- if (sc.GetRelative(++i) == '(') {
- while (i < len && (sc.GetRelative(++i) != ')' || sc.GetRelative(i - 1) == '\\'))
- ;
- if (sc.GetRelative(i) == ')')
- k = i;
- }
- else if (sc.GetRelative(i) == '[' || sc.GetRelative(++i) == '[') {
- while (i < len && (sc.GetRelative(++i) != ']' || sc.GetRelative(i - 1) == '\\'))
- ;
- if (sc.GetRelative(i) == ']')
- k = i;
- }
- }
- // At least a link text
- if (j) {
- sc.SetState(SCE_MARKDOWN_LINK);
- sc.Forward(j);
- // Also has a URL or reference portion
- if (k)
- sc.Forward(k - j);
- sc.ForwardSetState(SCE_MARKDOWN_DEFAULT);
- }
- }
- // Code - also a special case for alternate inside spacing
- if (sc.Match("``") && sc.GetRelative(3) != ' ') {
- sc.SetState(SCE_MARKDOWN_CODE2);
- sc.Forward();
- }
- else if (sc.ch == '`' && sc.chNext != ' ') {
- sc.SetState(SCE_MARKDOWN_CODE);
- }
- // Strong
- else if (sc.Match("**") && sc.GetRelative(2) != ' ') {
- sc.SetState(SCE_MARKDOWN_STRONG1);
- sc.Forward();
- }
- else if (sc.Match("__") && sc.GetRelative(2) != ' ') {
- sc.SetState(SCE_MARKDOWN_STRONG2);
- sc.Forward();
- }
- // Emphasis
- else if (sc.ch == '*' && sc.chNext != ' ')
- sc.SetState(SCE_MARKDOWN_EM1);
- else if (sc.ch == '_' && sc.chNext != ' ')
- sc.SetState(SCE_MARKDOWN_EM2);
- // Strikeout
- else if (sc.Match("~~") && sc.GetRelative(2) != ' ') {
- sc.SetState(SCE_MARKDOWN_STRIKEOUT);
- sc.Forward();
- }
- // Beginning of line
- else if (IsNewline(sc.ch))
- sc.SetState(SCE_MARKDOWN_LINE_BEGIN);
- }
- // Advance if not holding back the cursor for this iteration.
- if (!freezeCursor)
- sc.Forward();
- freezeCursor = false;
- }
- sc.Complete();
-}
-
-LexerModule lmMarkdown(SCLEX_MARKDOWN, ColorizeMarkdownDoc, "markdown");
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