Public-Mirrors
/
markdown-it
mirror of https://github.com/markdown-it/markdown-it.git
1
0
Fork 0
Code Issues Releases Activity
Browse Source

Move link helpers to it's own file 

+ return value of parseLink* functions in the state
pull/14/head
Alex Kocharin 10 years ago
parent
bbac451a42
commit
0705173c87
4 changed files with 187 additions and 170 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 166
      lib/links.js
  2. 20
      lib/parser_ref.js
  3. 170
      lib/rules_inline/links.js
  4. 1
      lib/rules_inline/state_inline.js

166
lib/links.js
View File

@ -0,0 +1,166 @@
'use strict';
//
// Parse link label
//
// this function assumes that first character ("[") already matches;
// returns the end of the label
function parseLinkLabel(state, start) {
var level, found, marker, ok,
labelEnd = -1,
max = state.posMax,
oldPos = state.pos,
oldLength = state.tokens.length,
oldPending = state.pending,
oldFlag = state.validateInsideLink;
if (state.validateInsideLink) { return -1; }
state.pos = start + 1;
state.validateInsideLink = true;
level = 1;
while (state.pos < max) {
marker = state.src.charCodeAt(state.pos);
if (marker === 0x5B /* [ */) {
level++;
} else if (marker === 0x5D /* ] */) {
level--;
if (level === 0) {
found = true;
break;
}
}
ok = state.parser.tokenizeSingle(state);
if (!ok) { state.pending += state.src[state.pos++]; }
}
if (found) { labelEnd = state.pos; }
// restore old state
state.pos = oldPos;
state.tokens.length = oldLength;
state.pending = oldPending;
state.validateInsideLink = oldFlag;
return labelEnd;
}
//
// Parse link destination
//
// on success it returns a string and updates state.pos;
// on failure it returns null
function parseLinkDestination(state, pos) {
var code, level,
max = state.posMax,
href = '';
if (state.src.charCodeAt(pos) === 0x3C /* < */) {
pos++;
while (pos < max) {
code = state.src.charCodeAt(pos);
if (code === 0x0A /* \n */) { return false; }
if (code === 0x3E /* > */) {
state.pos = pos + 1;
state.link_content = href;
return true;
}
if (code === 0x5C /* \ */ && pos + 1 < max) {
pos++;
href += state.src[pos++];
continue;
}
href += state.src[pos++];
}
// no closing '>'
return false;
}
// this should be ... } else { ... branch
level = 0;
while (pos < max) {
code = state.src.charCodeAt(pos);
if (code === 0x20) { break; }
// ascii control characters
if (code < 0x20 || code === 0x7F) { break; }
if (code === 0x5C /* \ */ && pos + 1 < max) {
pos++;
href += state.src[pos++];
continue;
}
if (code === 0x28 /* ( */) {
level++;
if (level > 1) { break; }
}
if (code === 0x29 /* ) */) {
level--;
if (level < 0) { break; }
}
href += state.src[pos++];
}
if (!href.length) { return false; }
state.pos = pos;
state.link_content = href;
return true;
}
//
// Parse link title
//
// on success it returns a string and updates state.pos;
// on failure it returns null
function parseLinkTitle(state, pos) {
var title, code,
max = state.posMax,
marker = state.src.charCodeAt(pos);
if (marker !== 0x22 /* " */ && marker !== 0x27 /* ' */ && marker !== 0x28 /* ( */) { return false; }
pos++;
title = '';
// if opening marker is "(", switch it to closing marker ")"
if (marker === 0x28) { marker = 0x29; }
while (pos < max) {
code = state.src.charCodeAt(pos);
if (code === marker) {
state.pos = pos + 1;
state.link_content = title;
return true;
}
if (code === 0x5C /* \ */ && pos + 1 < max) {
pos++;
title += state.src[pos++];
continue;
}
title += state.src[pos++];
}
return false;
}
function normalizeReference(str) {
return str.trim().replace(/\s+/g, ' ').toLowerCase();
}
module.exports.parseLinkLabel = parseLinkLabel;
module.exports.parseLinkDestination = parseLinkDestination;
module.exports.parseLinkTitle = parseLinkTitle;
module.exports.normalizeReference = normalizeReference;

20
lib/parser_ref.js
View File

@ -2,9 +2,12 @@
'use strict';
var StateInline = require('./rules_inline/state_inline');
var links = require('./rules_inline/links');
var skipSpaces = require('./helpers').skipSpaces;
var StateInline = require('./rules_inline/state_inline');
var skipSpaces = require('./helpers').skipSpaces;
var parseLinkLabel = require('./links').parseLinkLabel;
var parseLinkDestination = require('./links').parseLinkDestination;
var parseLinkTitle = require('./links').parseLinkTitle;
var normalizeReference = require('./links').normalizeReference;
// Parse link reference definition.
@ -18,7 +21,7 @@ module.exports = function parse_reference(str, parser, options, env) {
if (str.indexOf(']:') === -1) { return -1; }
state = new StateInline(str, parser, options, env);
labelEnd = links.parseLinkLabel(state, 0);
labelEnd = parseLinkLabel(state, 0);
if (labelEnd < 0 || str.charCodeAt(labelEnd + 1) !== 0x3A/* : */) { return -1; }
@ -33,8 +36,8 @@ module.exports = function parse_reference(str, parser, options, env) {
// [label]: destination 'title'
// ^^^^^^^^^^^ parse this
href = links.parseLinkDestination(state, pos);
if (href === null) { return -1; }
if (!parseLinkDestination(state, pos)) { return -1; }
href = state.link_content;
pos = state.pos;
// [label]: destination 'title'
@ -47,7 +50,8 @@ module.exports = function parse_reference(str, parser, options, env) {
// [label]: destination 'title'
// ^^^^^^^ parse this
if (pos < max && start !== pos && (title = links.parseLinkTitle(state, pos)) !== null) {
if (pos < max && start !== pos && parseLinkTitle(state, pos)) {
title = state.link_content;
pos = state.pos;
} else {
title = '';
@ -58,7 +62,7 @@ module.exports = function parse_reference(str, parser, options, env) {
pos = skipSpaces(state, pos);
if (pos < max && state.src.charCodeAt(pos) !== 0x0A) { return -1; }
label = links.normalizeReference(str.slice(1, labelEnd));
label = normalizeReference(str.slice(1, labelEnd));
env.references[label] = env.references[label] || { title: title, href: href };
return pos;

170
lib/rules_inline/links.js
View File

@ -2,162 +2,11 @@
'use strict';
var parseLinkLabel = require('../links').parseLinkLabel;
var parseLinkDestination = require('../links').parseLinkDestination;
var parseLinkTitle = require('../links').parseLinkTitle;
var normalizeReference = require('../links').normalizeReference;
//
// Parse link label
//
// this function assumes that first character ("[") already matches;
// returns the end of the label
function parseLinkLabel(state, start) {
var level, found, marker, ok,
labelEnd = -1,
max = state.posMax,
oldPos = state.pos,
oldLength = state.tokens.length,
oldPending = state.pending,
oldFlag = state.validateInsideLink;
if (state.validateInsideLink) { return -1; }
state.pos = start + 1;
state.validateInsideLink = true;
level = 1;
while (state.pos < max) {
marker = state.src.charCodeAt(state.pos);
if (marker === 0x5B /* [ */) {
level++;
} else if (marker === 0x5D /* ] */) {
level--;
if (level === 0) {
found = true;
break;
}
}
ok = state.parser.tokenizeSingle(state);
if (!ok) { state.pending += state.src[state.pos++]; }
}
if (found) { labelEnd = state.pos; }
// restore old state
state.pos = oldPos;
state.tokens.length = oldLength;
state.pending = oldPending;
state.validateInsideLink = oldFlag;
return labelEnd;
}
//
// Parse link destination
//
// on success it returns a string and updates state.pos;
// on failure it returns null
function parseLinkDestination(state, pos) {
var code, level,
max = state.posMax,
href = '';
if (state.src.charCodeAt(pos) === 0x3C /* < */) {
pos++;
while (pos < max) {
code = state.src.charCodeAt(pos);
if (code === 0x0A /* \n */) { return null; }
if (code === 0x3E /* > */) {
state.pos = pos + 1;
return href;
}
if (code === 0x5C /* \ */ && pos + 1 < max) {
pos++;
href += state.src[pos++];
continue;
}
href += state.src[pos++];
}
// no closing '>'
return null;
}
// this should be ... } else { ... branch
level = 0;
while (pos < max) {
code = state.src.charCodeAt(pos);
if (code === 0x20) { break; }
// ascii control characters
if (code < 0x20 || code === 0x7F) { break; }
if (code === 0x5C /* \ */ && pos + 1 < max) {
pos++;
href += state.src[pos++];
continue;
}
if (code === 0x28 /* ( */) {
level++;
if (level > 1) { break; }
}
if (code === 0x29 /* ) */) {
level--;
if (level < 0) { break; }
}
href += state.src[pos++];
}
if (!href.length) { return null; }
state.pos = pos;
return href;
}
//
// Parse link title
//
// on success it returns a string and updates state.pos;
// on failure it returns null
function parseLinkTitle(state, pos) {
var title, code,
max = state.posMax,
marker = state.src.charCodeAt(pos);
if (marker !== 0x22 /* " */ && marker !== 0x27 /* ' */ && marker !== 0x28 /* ( */) { return null; }
pos++;
title = '';
// if opening marker is "(", switch it to closing marker ")"
if (marker === 0x28) { marker = 0x29; }
while (pos < max) {
code = state.src.charCodeAt(pos);
if (code === marker) {
state.pos = pos + 1;
return title;
}
if (code === 0x5C /* \ */ && pos + 1 < max) {
pos++;
title += state.src[pos++];
continue;
}
title += state.src[pos++];
}
return null;
}
function normalizeReference(str) {
return str.trim().replace(/\s+/g, ' ').toLowerCase();
}
function links(state) {
var labelStart,
@ -205,8 +54,8 @@ function links(state) {
// [link]( <href> "title" )
// ^^^^^^ parsing link destination
start = pos;
href = parseLinkDestination(state, pos);
if (href !== null) {
if (parseLinkDestination(state, pos)) {
href = state.link_content;
pos = state.pos;
} else {
href = '';
@ -222,7 +71,8 @@ function links(state) {
// [link]( <href> "title" )
// ^^^^^^^ parsing link title
if (pos < max && start !== pos && (title = parseLinkTitle(state, pos)) !== null) {
if (pos < max && start !== pos && parseLinkTitle(state, pos)) {
title = state.link_content;
pos = state.pos;
// [link]( <href> "title" )
@ -307,7 +157,3 @@ function links(state) {
}
module.exports = links;
module.exports.parseLinkLabel = parseLinkLabel;
module.exports.parseLinkDestination = parseLinkDestination;
module.exports.parseLinkTitle = parseLinkTitle;
module.exports.normalizeReference = normalizeReference;

1
lib/rules_inline/state_inline.js
View File

@ -15,6 +15,7 @@ function StateInline(src, parser, options, env) {
this.validateInsideEm = false;
this.validateInsideLink = false;
this.level = 0;
this.link_content = '';
this.pendingLevel = 0;
}

Write Preview
Loading…
Cancel
Save