in ext/scintilla/lexers/LexMarkdown.cxx [144:417]
static void ColorizeMarkdownDoc(Sci_PositionU startPos, Sci_Position length, int initStyle,
WordList **, Accessor &styler) {
Sci_PositionU endPos = startPos + length;
int precharCount = 0;
bool isLinkNameDetecting = false;
// 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("~~~")) {
Sci_Position 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;
}
// Any link
if (sc.state == SCE_MARKDOWN_LINK) {
if (sc.Match("](") && sc.GetRelative(-1) != '\\') {
sc.Forward(2);
isLinkNameDetecting = true;
}
else if (sc.Match("]:") && sc.GetRelative(-1) != '\\') {
sc.Forward(2);
sc.SetState(SCE_MARKDOWN_DEFAULT);
}
else if (!isLinkNameDetecting && sc.ch == ']' && sc.GetRelative(-1) != '\\') {
sc.Forward();
sc.SetState(SCE_MARKDOWN_DEFAULT);
}
else if (isLinkNameDetecting && sc.ch == ')' && sc.GetRelative(-1) != '\\') {
sc.Forward();
sc.SetState(SCE_MARKDOWN_DEFAULT);
isLinkNameDetecting = false;
}
}
// 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.SetState(SCE_MARKDOWN_LINK);
sc.Forward(2);
}
else if (sc.ch == '[' && sc.GetRelative(-1) != '\\') {
sc.SetState(SCE_MARKDOWN_LINK);
sc.Forward();
}
// Code - also a special case for alternate inside spacing
else if (sc.Match("``") && sc.GetRelative(3) != ' ' && AtTermStart(sc)) {
sc.SetState(SCE_MARKDOWN_CODE2);
sc.Forward();
}
else if (sc.ch == '`' && sc.chNext != ' ' && AtTermStart(sc)) {
sc.SetState(SCE_MARKDOWN_CODE);
}
// Strong
else if (sc.Match("**") && sc.GetRelative(2) != ' ' && AtTermStart(sc)) {
sc.SetState(SCE_MARKDOWN_STRONG1);
sc.Forward();
}
else if (sc.Match("__") && sc.GetRelative(2) != ' ' && AtTermStart(sc)) {
sc.SetState(SCE_MARKDOWN_STRONG2);
sc.Forward();
}
// Emphasis
else if (sc.ch == '*' && sc.chNext != ' ' && AtTermStart(sc)) {
sc.SetState(SCE_MARKDOWN_EM1);
}
else if (sc.ch == '_' && sc.chNext != ' ' && AtTermStart(sc)) {
sc.SetState(SCE_MARKDOWN_EM2);
}
// Strikeout
else if (sc.Match("~~") && sc.GetRelative(2) != ' ' && AtTermStart(sc)) {
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();
}