Refactor latex replace code
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1 changed files with 49 additions and 48 deletions
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@ -47,6 +47,10 @@ export function htmlSerializeIfNeeded(model: EditorModel, {forceHTML = false} =
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const orig = md;
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const orig = md;
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if (SettingsStore.getValue("feature_latex_maths")) {
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if (SettingsStore.getValue("feature_latex_maths")) {
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const patternNames = ['tex', 'latex'];
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const patternTypes = ['display', 'inline'];
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const patternDefaults = {
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"tex": {
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// detect math with tex delimiters, inline: $...$, display $$...$$
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// detect math with tex delimiters, inline: $...$, display $$...$$
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// preferably use negative lookbehinds, not supported in all major browsers:
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// preferably use negative lookbehinds, not supported in all major browsers:
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// const displayPattern = "^(?<!\\\\)\\$\\$(?![ \\t])(([^$]|\\\\\\$)+?)\\$\\$$";
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// const displayPattern = "^(?<!\\\\)\\$\\$(?![ \\t])(([^$]|\\\\\\$)+?)\\$\\$$";
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@ -55,9 +59,7 @@ export function htmlSerializeIfNeeded(model: EditorModel, {forceHTML = false} =
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// conditions for display math detection $$...$$:
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// conditions for display math detection $$...$$:
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// - pattern starts at beginning of line or is not prefixed with backslash or dollar
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// - pattern starts at beginning of line or is not prefixed with backslash or dollar
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// - left delimiter ($$) is not escaped by backslash
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// - left delimiter ($$) is not escaped by backslash
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const displayPatternAlternative = (SdkConfig.get()['latex_maths_delims'] ||
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"display": "(^|[^\\\\$])\\$\\$(([^$]|\\\\\\$)+?)\\$\\$",
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{})['display_pattern_alternative'] ||
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"(^|[^\\\\$])\\$\\$(([^$]|\\\\\\$)+?)\\$\\$";
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// conditions for inline math detection $...$:
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// conditions for inline math detection $...$:
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// - pattern starts at beginning of line, follows whitespace character or punctuation
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// - pattern starts at beginning of line, follows whitespace character or punctuation
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@ -65,42 +67,41 @@ export function htmlSerializeIfNeeded(model: EditorModel, {forceHTML = false} =
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// - left and right delimiters ($) are not escaped by backslashes
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// - left and right delimiters ($) are not escaped by backslashes
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// - left delimiter is not followed by whitespace character
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// - left delimiter is not followed by whitespace character
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// - right delimiter is not prefixed with whitespace character
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// - right delimiter is not prefixed with whitespace character
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const inlinePatternAlternative = (SdkConfig.get()['latex_maths_delims'] ||
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"inline":
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{})['inline_pattern_alternative'] ||
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"(^|\\s|[.,!?:;])(?!\\\\)\\$(?!\\s)(([^$\\n]|\\\\\\$)*([^\\\\\\s\\$]|\\\\\\$)(?:\\\\\\$)?)\\$",
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"(^|\\s|[.,!?:;])(?!\\\\)\\$(?!\\s)(([^$\\n]|\\\\\\$)*([^\\\\\\s\\$]|\\\\\\$)(?:\\\\\\$)?)\\$";
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},
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"latex": {
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md = md.replace(RegExp(displayPatternAlternative, "gm"), function(m, p1, p2) {
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const p2e = AllHtmlEntities.encode(p2);
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return `${p1}<div data-mx-maths="${p2e}">\n\n</div>\n\n`;
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});
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md = md.replace(RegExp(inlinePatternAlternative, "gm"), function(m, p1, p2) {
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const p2e = AllHtmlEntities.encode(p2);
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return `${p1}<span data-mx-maths="${p2e}"></span>`;
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});
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// detect math with latex delimiters, inline: \(...\), display \[...\]
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// detect math with latex delimiters, inline: \(...\), display \[...\]
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// conditions for display math detection \[...\]:
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// conditions for display math detection \[...\]:
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// - pattern starts at beginning of line or is not prefixed with backslash
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// - pattern starts at beginning of line or is not prefixed with backslash
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// - pattern is not empty
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// - pattern is not empty
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const displayPattern = (SdkConfig.get()['latex_maths_delims'] || {})['display_pattern'] ||
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"display": "(^|[^\\\\])\\\\\\[(?!\\\\\\])(.*?)\\\\\\]",
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"(^|[^\\\\])\\\\\\[(?!\\\\\\])(.*?)\\\\\\]";
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// conditions for inline math detection \(...\):
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// conditions for inline math detection \(...\):
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// - pattern starts at beginning of line or is not prefixed with backslash
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// - pattern starts at beginning of line or is not prefixed with backslash
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// - pattern is not empty
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// - pattern is not empty
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const inlinePattern = (SdkConfig.get()['latex_maths_delims'] || {})['inline_pattern'] ||
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"inline": "(^|[^\\\\])\\\\\\((?!\\\\\\))(.*?)\\\\\\)",
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"(^|[^\\\\])\\\\\\((?!\\\\\\))(.*?)\\\\\\)";
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},
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};
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md = md.replace(RegExp(displayPattern, "gms"), function(m, p1, p2) {
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patternNames.forEach(function(patternName) {
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patternTypes.forEach(function(patternType) {
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// get the regex replace pattern from config or use the default
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const pattern = (SdkConfig.get()["latex_maths_delims"] ||
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{})[patternType + "_pattern_" + patternName] ||
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patternDefaults[patternName][patternType];
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md = md.replace(RegExp(pattern, "gms"), function(m, p1, p2) {
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const p2e = AllHtmlEntities.encode(p2);
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const p2e = AllHtmlEntities.encode(p2);
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switch (patternType) {
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case "display":
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return `${p1}<div data-mx-maths="${p2e}">\n\n</div>\n\n`;
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return `${p1}<div data-mx-maths="${p2e}">\n\n</div>\n\n`;
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});
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case "inline":
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md = md.replace(RegExp(inlinePattern, "gms"), function(m, p1, p2) {
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const p2e = AllHtmlEntities.encode(p2);
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return `${p1}<span data-mx-maths="${p2e}"></span>`;
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return `${p1}<span data-mx-maths="${p2e}"></span>`;
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}
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});
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});
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});
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});
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// make sure div tags always start on a new line, otherwise it will confuse
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// make sure div tags always start on a new line, otherwise it will confuse
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