commit f527f2909051fa32dd57420de8a51b61d031deb9 · pyrox.dev/blog

+2 -1

_config.ts

···

       27
       27
        
       

     

       28
       28
        
       // Additional external plugins

     

       29
       29
        
       import toc from "lume_markdown_plugins/toc.ts";

     

       30
       30
       -
       import footnotes from "lume_markdown_plugins/footnotes.ts";

     

       31
       30
        
       import anchor from "npm:markdown-it-anchor";

     

       31
       31
       +
       import footnotes from "./plugins/footnotes.ts";

     

       32
       32
        
       import slugify from "npm:@sindresorhus/slugify";

     

       33
       33
        
       

     

       34
       34
        
       // CSS

     
···

       70
       70
        
               permalink: anchor.permalink.headerLink(),

     

       71
       71
        
               slugify: (s: string) => slugify(s),

     

       72
       72
        
             }],

     

       73
       73
       +
             footnotes,

     

       73
       74
        
           ],

     

       74
       75
        
         },

     

       75
       76
        
       });

+323

plugins/footnotes.ts

···

       1
       1
       +
       // deno-lint-ignore-file no-explicit-any

     

       2
       2
       +
       

     

       3
       3
       +
       export interface Options {

     

       4
       4
       +
         /** Key to save the title in the page data */

     

       5
       5
       +
         key: string;

     

       6
       6
       +
       

     

       7
       7
       +
         /** The prefix to assign to all ids */

     

       8
       8
       +
         idPrefix: string;

     

       9
       9
       +
       

     

       10
       10
       +
         /** The prefix to assign to all references ids */

     

       11
       11
       +
         referenceIdPrefix: string;

     

       12
       12
       +
       

     

       13
       13
       +
         /** HTML attributes to the <sup> element used for the reference */

     

       14
       14
       +
         referenceAttrs: Record<string, string>;

     

       15
       15
       +
       }

     

       16
       16
       +
       

     

       17
       17
       +
       export const defaults: Options = {

     

       18
       18
       +
         key: "footnotes",

     

       19
       19
       +
         idPrefix: "fn-",

     

       20
       20
       +
         referenceIdPrefix: "fnref-",

     

       21
       21
       +
         referenceAttrs: {

     

       22
       22
       +
           class: "fn-ref",

     

       23
       23
       +
         },

     

       24
       24
       +
       };

     

       25
       25
       +
       

     

       26
       26
       +
       export default function footNotes(md: any, userOptions: Partial<Options> = {}) {

     

       27
       27
       +
         const options = Object.assign({}, defaults, userOptions) as Options;

     

       28
       28
       +
         const parseLinkLabel = md.helpers.parseLinkLabel;

     

       29
       29
       +
         const isSpace = md.utils.isSpace;

     

       30
       30
       +
       

     

       31
       31
       +
         md.renderer.rules.footnote_reference = function (tokens: any[], idx: number) {

     

       32
       32
       +
           const { id, label } = tokens[idx].meta;

     

       33
       33
       +
           const attrs = Object.entries(options.referenceAttrs)

     

       34
       34
       +
             .map(([key, value]) => `${key}="${value}"`);

     

       35
       35
       +
       

     

       36
       36
       +
           attrs.push(`href="#${options.idPrefix}${id}"`);

     

       37
       37
       +
           attrs.push(`id="${options.referenceIdPrefix}${id}"`);

     

       38
       38
       +
       

     

       39
       39
       +
           return `<sup><a ${attrs.join(" ")}>${id}</a></sup>`;

     

       40
       40
       +
         };

     

       41
       41
       +
       

     

       42
       42
       +
         // Process footnote block definition

     

       43
       43
       +
         function footnote_block(

     

       44
       44
       +
           state: any,

     

       45
       45
       +
           startLine: number,

     

       46
       46
       +
           endLine: number,

     

       47
       47
       +
           silent: boolean,

     

       48
       48
       +
         ) {

     

       49
       49
       +
           const start = state.bMarks[startLine] + state.tShift[startLine];

     

       50
       50
       +
           const max = state.eMarks[startLine];

     

       51
       51
       +
       

     

       52
       52
       +
           /* Line should be at least 5 characters: [^x]: */

     

       53
       53
       +
           if (

     

       54
       54
       +
             start + 4 > max ||

     

       55
       55
       +
             state.src.charCodeAt(start) !== 0x5B || /* [ */

     

       56
       56
       +
             state.src.charCodeAt(start + 1) !== 0x5E /* ^ */

     

       57
       57
       +
           ) {

     

       58
       58
       +
             return false;

     

       59
       59
       +
           }

     

       60
       60
       +
       

     

       61
       61
       +
           let pos;

     

       62
       62
       +
       

     

       63
       63
       +
           for (pos = start + 2; pos < max; pos++) {

     

       64
       64
       +
             if (state.src.charCodeAt(pos) === 0x20) {

     

       65
       65
       +
               return false;

     

       66
       66
       +
             }

     

       67
       67
       +
             if (state.src.charCodeAt(pos) === 0x5D /* ] */) {

     

       68
       68
       +
               break;

     

       69
       69
       +
             }

     

       70
       70
       +
           }

     

       71
       71
       +
       

     

       72
       72
       +
           // no empty footnote labels

     

       73
       73
       +
           if (pos === start + 2) {

     

       74
       74
       +
             return false;

     

       75
       75
       +
           }

     

       76
       76
       +
       

     

       77
       77
       +
           if (pos + 1 >= max || state.src.charCodeAt(++pos) !== 0x3A /* : */) {

     

       78
       78
       +
             return false;

     

       79
       79
       +
           }

     

       80
       80
       +
       

     

       81
       81
       +
           if (silent) {

     

       82
       82
       +
             return true;

     

       83
       83
       +
           }

     

       84
       84
       +
       

     

       85
       85
       +
           pos++;

     

       86
       86
       +
       

     

       87
       87
       +
           const footnotes = getFootnotes(state);

     

       88
       88
       +
           const label = state.src.slice(start + 2, pos - 2);

     

       89
       89
       +
           const id = footnotes.size + 1;

     

       90
       90
       +
       

     

       91
       91
       +
           const openToken = new state.Token("footnote_reference_open", "", 1);

     

       92
       92
       +
           openToken.meta = { id };

     

       93
       93
       +
           openToken.level = state.level++;

     

       94
       94
       +
           state.tokens.push(openToken);

     

       95
       95
       +
       

     

       96
       96
       +
           footnotes.set(id, { id, label });

     

       97
       97
       +
       

     

       98
       98
       +
           const oldBMark = state.bMarks[startLine];

     

       99
       99
       +
           const oldTShift = state.tShift[startLine];

     

       100
       100
       +
           const oldSCount = state.sCount[startLine];

     

       101
       101
       +
           const oldParentType = state.parentType;

     

       102
       102
       +
       

     

       103
       103
       +
           const posAfterColon = pos;

     

       104
       104
       +
           const initial = state.sCount[startLine] + pos -

     

       105
       105
       +
             (state.bMarks[startLine] + state.tShift[startLine]);

     

       106
       106
       +
           let offset = initial;

     

       107
       107
       +
       

     

       108
       108
       +
           while (pos < max) {

     

       109
       109
       +
             const ch = state.src.charCodeAt(pos);

     

       110
       110
       +
       

     

       111
       111
       +
             if (!isSpace(ch)) {

     

       112
       112
       +
               break;

     

       113
       113
       +
             }

     

       114
       114
       +
             if (ch === 0x09) {

     

       115
       115
       +
               offset += 4 - offset % 4;

     

       116
       116
       +
             } else {

     

       117
       117
       +
               offset++;

     

       118
       118
       +
             }

     

       119
       119
       +
       

     

       120
       120
       +
             pos++;

     

       121
       121
       +
           }

     

       122
       122
       +
       

     

       123
       123
       +
           state.tShift[startLine] = pos - posAfterColon;

     

       124
       124
       +
           state.sCount[startLine] = offset - initial;

     

       125
       125
       +
           state.bMarks[startLine] = posAfterColon;

     

       126
       126
       +
           state.blkIndent += 4;

     

       127
       127
       +
           state.parentType = "footnote";

     

       128
       128
       +
       

     

       129
       129
       +
           if (state.sCount[startLine] < state.blkIndent) {

     

       130
       130
       +
             state.sCount[startLine] += state.blkIndent;

     

       131
       131
       +
           }

     

       132
       132
       +
       

     

       133
       133
       +
           state.md.block.tokenize(state, startLine, endLine, true);

     

       134
       134
       +
       

     

       135
       135
       +
           state.parentType = oldParentType;

     

       136
       136
       +
           state.blkIndent -= 4;

     

       137
       137
       +
           state.tShift[startLine] = oldTShift;

     

       138
       138
       +
           state.sCount[startLine] = oldSCount;

     

       139
       139
       +
           state.bMarks[startLine] = oldBMark;

     

       140
       140
       +
       

     

       141
       141
       +
           const closeToken = new state.Token("footnote_reference_close", "", -1);

     

       142
       142
       +
           closeToken.level = --state.level;

     

       143
       143
       +
           state.tokens.push(closeToken);

     

       144
       144
       +
       

     

       145
       145
       +
           return true;

     

       146
       146
       +
         }

     

       147
       147
       +
       

     

       148
       148
       +
         // Process inline footnotes (^[...])

     

       149
       149
       +
         function footnote_inline(state: any, silent: boolean) {

     

       150
       150
       +
           const max = state.posMax;

     

       151
       151
       +
           const start = state.pos;

     

       152
       152
       +
       

     

       153
       153
       +
           /* Line should be at least 2 characters: ^[ */

     

       154
       154
       +
           if (

     

       155
       155
       +
             start + 2 >= max ||

     

       156
       156
       +
             state.src.charCodeAt(start) !== 0x5E ||

     

       157
       157
       +
             state.src.charCodeAt(start + 1) !== 0x5B

     

       158
       158
       +
           ) {

     

       159
       159
       +
             return false;

     

       160
       160
       +
           }

     

       161
       161
       +
       

     

       162
       162
       +
           const labelStart = start + 2;

     

       163
       163
       +
           const labelEnd = parseLinkLabel(state, start + 1);

     

       164
       164
       +
       

     

       165
       165
       +
           // parser failed to find ']', so it's not a valid note

     

       166
       166
       +
           if (labelEnd < 0) {

     

       167
       167
       +
             return false;

     

       168
       168
       +
           }

     

       169
       169
       +
       

     

       170
       170
       +
           // We found the end of the link, and know for a fact it's a valid link;

     

       171
       171
       +
           // so all that's left to do is to call tokenizer.

     

       172
       172
       +
           //

     

       173
       173
       +
           if (!silent) {

     

       174
       174
       +
             const footnotes = getFootnotes(state);

     

       175
       175
       +
             const id = footnotes.size + 1;

     

       176
       176
       +
             const label = id.toString();

     

       177
       177
       +
       

     

       178
       178
       +
             const token = state.push("footnote_reference", "", 0);

     

       179
       179
       +
             token.meta = { id, label };

     

       180
       180
       +
       

     

       181
       181
       +
             footnotes.set(id, {

     

       182
       182
       +
               id,

     

       183
       183
       +
               label,

     

       184
       184
       +
               content: `${state.src.slice(labelStart, labelEnd)}`,

     

       185
       185
       +
             });

     

       186
       186
       +
           }

     

       187
       187
       +
       

     

       188
       188
       +
           state.pos = labelEnd + 1;

     

       189
       189
       +
           state.posMax = max;

     

       190
       190
       +
           return true;

     

       191
       191
       +
         }

     

       192
       192
       +
       

     

       193
       193
       +
         // Process footnote references ([^...])

     

       194
       194
       +
         function footnote_reference(state: any, silent: boolean) {

     

       195
       195
       +
           const max = state.posMax;

     

       196
       196
       +
           const start = state.pos;

     

       197
       197
       +
       

     

       198
       198
       +
           /* Line should be at least 4 characters: [^x] */

     

       199
       199
       +
           if (

     

       200
       200
       +
             start + 3 > max ||

     

       201
       201
       +
             state.src.charCodeAt(start) !== 0x5B /* [ */ ||

     

       202
       202
       +
             state.src.charCodeAt(start + 1) !== 0x5E /* ^ */

     

       203
       203
       +
           ) {

     

       204
       204
       +
             return false;

     

       205
       205
       +
           }

     

       206
       206
       +
       

     

       207
       207
       +
           const labelStart = start + 2;

     

       208
       208
       +
           let labelEnd = 0;

     

       209
       209
       +
       

     

       210
       210
       +
           for (labelEnd = labelStart; labelEnd < max; labelEnd++) {

     

       211
       211
       +
             const char = state.src.charCodeAt(labelEnd);

     

       212
       212
       +
       

     

       213
       213
       +
             if (char === 0x20 || char === 0x0A) {

     

       214
       214
       +
               return false;

     

       215
       215
       +
             }

     

       216
       216
       +
       

     

       217
       217
       +
             if (char === 0x5D /* ] */) {

     

       218
       218
       +
               break;

     

       219
       219
       +
             }

     

       220
       220
       +
           }

     

       221
       221
       +
       

     

       222
       222
       +
           if (labelStart === labelEnd || labelEnd >= max) {

     

       223
       223
       +
             return false;

     

       224
       224
       +
           }

     

       225
       225
       +
       

     

       226
       226
       +
           if (!silent) {

     

       227
       227
       +
             const label = state.src.slice(labelStart, labelEnd);

     

       228
       228
       +
             const footnote = searchFootnote(state, label);

     

       229
       229
       +
             const token = state.push("footnote_reference", "", 0);

     

       230
       230
       +
             token.meta = { ...footnote };

     

       231
       231
       +
           }

     

       232
       232
       +
       

     

       233
       233
       +
           state.pos = ++labelEnd;

     

       234
       234
       +
           state.posMax = max;

     

       235
       235
       +
           return true;

     

       236
       236
       +
         }

     

       237
       237
       +
       

     

       238
       238
       +
         // Glue footnote tokens to end of token stream

     

       239
       239
       +
         function footnote_tail(state: any) {

     

       240
       240
       +
           const footnotes = getFootnotes(state);

     

       241
       241
       +
       

     

       242
       242
       +
           if (!footnotes.size) {

     

       243
       243
       +
             return;

     

       244
       244
       +
           }

     

       245
       245
       +
       

     

       246
       246
       +
           let currentFootnote: Footnote | undefined;

     

       247
       247
       +
           let currentTokens: any[] | undefined;

     

       248
       248
       +
       

     

       249
       249
       +
           state.tokens = state.tokens.filter(function (tok: any) {

     

       250
       250
       +
             if (tok.type === "footnote_reference_open") {

     

       251
       251
       +
               currentFootnote = footnotes.get(tok.meta.id)!;

     

       252
       252
       +
               currentTokens = [];

     

       253
       253
       +
               return false;

     

       254
       254
       +
             }

     

       255
       255
       +
       

     

       256
       256
       +
             if (tok.type === "footnote_reference_close") {

     

       257
       257
       +
               currentFootnote!.content = md.renderer.render(

     

       258
       258
       +
                 currentTokens,

     

       259
       259
       +
                 state.md.options,

     

       260
       260
       +
                 state.env,

     

       261
       261
       +
               );

     

       262
       262
       +
               currentTokens = undefined;

     

       263
       263
       +
               return false;

     

       264
       264
       +
             }

     

       265
       265
       +
       

     

       266
       266
       +
             if (currentTokens) {

     

       267
       267
       +
               currentTokens.push(tok);

     

       268
       268
       +
             }

     

       269
       269
       +
       

     

       270
       270
       +
             return !currentTokens;

     

       271
       271
       +
           });

     

       272
       272
       +
         }

     

       273
       273
       +
       

     

       274
       274
       +
         md.block.ruler.before("reference", "footnote_block", footnote_block, {

     

       275
       275
       +
           alt: ["paragraph", "reference"],

     

       276
       276
       +
         });

     

       277
       277
       +
         md.inline.ruler.after("image", "footnote_inline", footnote_inline);

     

       278
       278
       +
         md.inline.ruler.after("footnote_inline", "footnote_reference", footnote_reference);

     

       279
       279
       +
         md.core.ruler.after("inline", "footnote_tail", footnote_tail);

     

       280
       280
       +
       

     

       281
       281
       +
         md.core.ruler.push("saveFootnotes", function (state: any) {

     

       282
       282
       +
           const data = state.env.data?.page?.data;

     

       283
       283
       +
       

     

       284
       284
       +
           if (!data || data[options.key]) {

     

       285
       285
       +
             return;

     

       286
       286
       +
           }

     

       287
       287
       +
       

     

       288
       288
       +
           const footnotes = getFootnotes(state);

     

       289
       289
       +
           data[options.key] = Array.from(footnotes.values()).map((footnote) => ({

     

       290
       290
       +
             id: `${options.idPrefix}${footnote.id}`,

     

       291
       291
       +
             refId: `${options.referenceIdPrefix}${footnote.id}`,

     

       292
       292
       +
             label: footnote.label,

     

       293
       293
       +
             content: footnote.content,

     

       294
       294
       +
             rawId: `${footnote.id}`,

     

       295
       295
       +
           }));

     

       296
       296
       +
         });

     

       297
       297
       +
       }

     

       298
       298
       +
       

     

       299
       299
       +
       interface Footnote {

     

       300
       300
       +
         id: number;

     

       301
       301
       +
         label?: string;

     

       302
       302
       +
         content?: string;

     

       303
       303
       +
         tokens?: any[];

     

       304
       304
       +
         rawId?: string;

     

       305
       305
       +
       }

     

       306
       306
       +
       

     

       307
       307
       +
       function getFootnotes(state: any): Map<number, Footnote> {

     

       308
       308
       +
         if (!state.env.fn) {

     

       309
       309
       +
           state.env.fn = new Map<number, Footnote>();

     

       310
       310
       +
         }

     

       311
       311
       +
       

     

       312
       312
       +
         return state.env.fn;

     

       313
       313
       +
       }

     

       314
       314
       +
       

     

       315
       315
       +
       function searchFootnote(state: any, label: string) {

     

       316
       316
       +
         const map = getFootnotes(state);

     

       317
       317
       +
       

     

       318
       318
       +
         for (const value of map.values()) {

     

       319
       319
       +
           if (value.label === label) {

     

       320
       320
       +
             return value;

     

       321
       321
       +
           }

     

       322
       322
       +
         }

     

       323
       323
       +
       }