matrix-react-sdk
Version:
SDK for matrix.org using React
229 lines (193 loc) • 26.2 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.replaceRangeAndExpandSelection = replaceRangeAndExpandSelection;
exports.replaceRangeAndMoveCaret = replaceRangeAndMoveCaret;
exports.rangeStartsAtBeginningOfLine = rangeStartsAtBeginningOfLine;
exports.rangeEndsAtEndOfLine = rangeEndsAtEndOfLine;
exports.formatRangeAsQuote = formatRangeAsQuote;
exports.formatRangeAsCode = formatRangeAsCode;
exports.toggleInlineFormat = toggleInlineFormat;
/*
Copyright 2019 The Matrix.org Foundation C.I.C.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* Some common queries and transformations on the editor model
*/
function replaceRangeAndExpandSelection(range
/*: Range*/
, newParts
/*: Part[]*/
) {
const {
model
} = range;
model.transform(() => {
const oldLen = range.length;
const addedLen = range.replace(newParts);
const firstOffset = range.start.asOffset(model);
const lastOffset = firstOffset.add(oldLen + addedLen);
return model.startRange(firstOffset.asPosition(model), lastOffset.asPosition(model));
});
}
function replaceRangeAndMoveCaret(range
/*: Range*/
, newParts
/*: Part[]*/
) {
const {
model
} = range;
model.transform(() => {
const oldLen = range.length;
const addedLen = range.replace(newParts);
const firstOffset = range.start.asOffset(model);
const lastOffset = firstOffset.add(oldLen + addedLen);
return lastOffset.asPosition(model);
});
}
function rangeStartsAtBeginningOfLine(range
/*: Range*/
) {
const {
model
} = range;
const startsWithPartial = range.start.offset !== 0;
const isFirstPart = range.start.index === 0;
const previousIsNewline = !isFirstPart && model.parts[range.start.index - 1].type === "newline";
return !startsWithPartial && (isFirstPart || previousIsNewline);
}
function rangeEndsAtEndOfLine(range
/*: Range*/
) {
const {
model
} = range;
const lastPart = model.parts[range.end.index];
const endsWithPartial = range.end.offset !== lastPart.text.length;
const isLastPart = range.end.index === model.parts.length - 1;
const nextIsNewline = !isLastPart && model.parts[range.end.index + 1].type === "newline";
return !endsWithPartial && (isLastPart || nextIsNewline);
}
function formatRangeAsQuote(range
/*: Range*/
) {
const {
model,
parts
} = range;
const {
partCreator
} = model;
for (let i = 0; i < parts.length; ++i) {
const part = parts[i];
if (part.type === "newline") {
parts.splice(i + 1, 0, partCreator.plain("> "));
}
}
parts.unshift(partCreator.plain("> "));
if (!rangeStartsAtBeginningOfLine(range)) {
parts.unshift(partCreator.newline());
}
if (!rangeEndsAtEndOfLine(range)) {
parts.push(partCreator.newline());
}
parts.push(partCreator.newline());
replaceRangeAndExpandSelection(range, parts);
}
function formatRangeAsCode(range
/*: Range*/
) {
const {
model,
parts
} = range;
const {
partCreator
} = model;
const needsBlock = parts.some(p => p.type === "newline");
if (needsBlock) {
parts.unshift(partCreator.plain("```"), partCreator.newline());
if (!rangeStartsAtBeginningOfLine(range)) {
parts.unshift(partCreator.newline());
}
parts.push(partCreator.newline(), partCreator.plain("```"));
if (!rangeEndsAtEndOfLine(range)) {
parts.push(partCreator.newline());
}
} else {
parts.unshift(partCreator.plain("`"));
parts.push(partCreator.plain("`"));
}
replaceRangeAndExpandSelection(range, parts);
} // parts helper methods
const isBlank = part => !part.text || !/\S/.test(part.text);
const isNL = part => part.type === "newline";
function toggleInlineFormat(range
/*: Range*/
, prefix
/*: string*/
, suffix = prefix) {
const {
model,
parts
} = range;
const {
partCreator
} = model; // compute paragraph [start, end] indexes
const paragraphIndexes = [];
let startIndex = 0; // start at i=2 because we look at i and up to two parts behind to detect paragraph breaks at their end
for (let i = 2; i < parts.length; i++) {
// paragraph breaks can be denoted in a multitude of ways,
// - 2 newline parts in sequence
// - newline part, plain(<empty or just spaces>), newline part
// bump startIndex onto the first non-blank after the paragraph ending
if (isBlank(parts[i - 2]) && isNL(parts[i - 1]) && !isNL(parts[i]) && !isBlank(parts[i])) {
startIndex = i;
} // if at a paragraph break, store the indexes of the paragraph
if (isNL(parts[i - 1]) && isNL(parts[i])) {
paragraphIndexes.push([startIndex, i - 1]);
startIndex = i + 1;
} else if (isNL(parts[i - 2]) && isBlank(parts[i - 1]) && isNL(parts[i])) {
paragraphIndexes.push([startIndex, i - 2]);
startIndex = i + 1;
}
}
const lastNonEmptyPart = parts.map(isBlank).lastIndexOf(false); // If we have not yet included the final paragraph then add it now
if (startIndex <= lastNonEmptyPart) {
paragraphIndexes.push([startIndex, lastNonEmptyPart + 1]);
} // keep track of how many things we have inserted as an offset:=0
let offset = 0;
paragraphIndexes.forEach(([startIdx, endIdx]) => {
// for each paragraph apply the same rule
const base = startIdx + offset;
const index = endIdx + offset;
const isFormatted = index - base > 0 && parts[base].text.startsWith(prefix) && parts[index - 1].text.endsWith(suffix);
if (isFormatted) {
// remove prefix and suffix
const partWithoutPrefix = parts[base].serialize();
partWithoutPrefix.text = partWithoutPrefix.text.substr(prefix.length);
parts[base] = partCreator.deserializePart(partWithoutPrefix);
const partWithoutSuffix = parts[index - 1].serialize();
const suffixPartText = partWithoutSuffix.text;
partWithoutSuffix.text = suffixPartText.substring(0, suffixPartText.length - suffix.length);
parts[index - 1] = partCreator.deserializePart(partWithoutSuffix);
} else {
parts.splice(index, 0, partCreator.plain(suffix)); // splice in the later one first to not change offset
parts.splice(base, 0, partCreator.plain(prefix));
offset += 2; // offset index to account for the two items we just spliced in
}
});
replaceRangeAndExpandSelection(range, parts);
}
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2019 The Matrix.org Foundation C.I.C.\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n*/\n\nimport Range from \"./range\";\nimport {Part} from \"./parts\";\n\n/**\n * Some common queries and transformations on the editor model\n */\n\nexport function replaceRangeAndExpandSelection(range: Range, newParts: Part[]) {\n    const {model} = range;\n    model.transform(() => {\n        const oldLen = range.length;\n        const addedLen = range.replace(newParts);\n        const firstOffset = range.start.asOffset(model);\n        const lastOffset = firstOffset.add(oldLen + addedLen);\n        return model.startRange(firstOffset.asPosition(model), lastOffset.asPosition(model));\n    });\n}\n\nexport function replaceRangeAndMoveCaret(range: Range, newParts: Part[]) {\n    const {model} = range;\n    model.transform(() => {\n        const oldLen = range.length;\n        const addedLen = range.replace(newParts);\n        const firstOffset = range.start.asOffset(model);\n        const lastOffset = firstOffset.add(oldLen + addedLen);\n        return lastOffset.asPosition(model);\n    });\n}\n\nexport function rangeStartsAtBeginningOfLine(range: Range) {\n    const {model} = range;\n    const startsWithPartial = range.start.offset !== 0;\n    const isFirstPart = range.start.index === 0;\n    const previousIsNewline = !isFirstPart && model.parts[range.start.index - 1].type === \"newline\";\n    return !startsWithPartial && (isFirstPart || previousIsNewline);\n}\n\nexport function rangeEndsAtEndOfLine(range: Range) {\n    const {model} = range;\n    const lastPart = model.parts[range.end.index];\n    const endsWithPartial = range.end.offset !== lastPart.text.length;\n    const isLastPart = range.end.index === model.parts.length - 1;\n    const nextIsNewline = !isLastPart && model.parts[range.end.index + 1].type === \"newline\";\n    return !endsWithPartial && (isLastPart || nextIsNewline);\n}\n\nexport function formatRangeAsQuote(range: Range) {\n    const {model, parts} = range;\n    const {partCreator} = model;\n    for (let i = 0; i < parts.length; ++i) {\n        const part = parts[i];\n        if (part.type === \"newline\") {\n            parts.splice(i + 1, 0, partCreator.plain(\"> \"));\n        }\n    }\n    parts.unshift(partCreator.plain(\"> \"));\n    if (!rangeStartsAtBeginningOfLine(range)) {\n        parts.unshift(partCreator.newline());\n    }\n    if (!rangeEndsAtEndOfLine(range)) {\n        parts.push(partCreator.newline());\n    }\n\n    parts.push(partCreator.newline());\n    replaceRangeAndExpandSelection(range, parts);\n}\n\nexport function formatRangeAsCode(range: Range) {\n    const {model, parts} = range;\n    const {partCreator} = model;\n    const needsBlock = parts.some(p => p.type === \"newline\");\n    if (needsBlock) {\n        parts.unshift(partCreator.plain(\"```\"), partCreator.newline());\n        if (!rangeStartsAtBeginningOfLine(range)) {\n            parts.unshift(partCreator.newline());\n        }\n        parts.push(\n            partCreator.newline(),\n            partCreator.plain(\"```\"));\n        if (!rangeEndsAtEndOfLine(range)) {\n            parts.push(partCreator.newline());\n        }\n    } else {\n        parts.unshift(partCreator.plain(\"`\"));\n        parts.push(partCreator.plain(\"`\"));\n    }\n    replaceRangeAndExpandSelection(range, parts);\n}\n\n// parts helper methods\nconst isBlank = part => !part.text || !/\\S/.test(part.text);\nconst isNL = part => part.type === \"newline\";\n\nexport function toggleInlineFormat(range: Range, prefix: string, suffix = prefix) {\n    const {model, parts} = range;\n    const {partCreator} = model;\n\n    // compute paragraph [start, end] indexes\n    const paragraphIndexes = [];\n    let startIndex = 0;\n    // start at i=2 because we look at i and up to two parts behind to detect paragraph breaks at their end\n    for (let i = 2; i < parts.length; i++) {\n        // paragraph breaks can be denoted in a multitude of ways,\n        // - 2 newline parts in sequence\n        // - newline part, plain(<empty or just spaces>), newline part\n\n        // bump startIndex onto the first non-blank after the paragraph ending\n        if (isBlank(parts[i - 2]) && isNL(parts[i - 1]) && !isNL(parts[i]) && !isBlank(parts[i])) {\n            startIndex = i;\n        }\n\n        // if at a paragraph break, store the indexes of the paragraph\n        if (isNL(parts[i - 1]) && isNL(parts[i])) {\n            paragraphIndexes.push([startIndex, i - 1]);\n            startIndex = i + 1;\n        } else if (isNL(parts[i - 2]) && isBlank(parts[i - 1]) && isNL(parts[i])) {\n            paragraphIndexes.push([startIndex, i - 2]);\n            startIndex = i + 1;\n        }\n    }\n\n    const lastNonEmptyPart = parts.map(isBlank).lastIndexOf(false);\n    // If we have not yet included the final paragraph then add it now\n    if (startIndex <= lastNonEmptyPart) {\n        paragraphIndexes.push([startIndex, lastNonEmptyPart + 1]);\n    }\n\n    // keep track of how many things we have inserted as an offset:=0\n    let offset = 0;\n    paragraphIndexes.forEach(([startIdx, endIdx]) => {\n        // for each paragraph apply the same rule\n        const base = startIdx + offset;\n        const index = endIdx + offset;\n\n        const isFormatted = (index - base > 0) &&\n            parts[base].text.startsWith(prefix) &&\n            parts[index - 1].text.endsWith(suffix);\n\n        if (isFormatted) {\n            // remove prefix and suffix\n            const partWithoutPrefix = parts[base].serialize();\n            partWithoutPrefix.text = partWithoutPrefix.text.substr(prefix.length);\n            parts[base] = partCreator.deserializePart(partWithoutPrefix);\n\n            const partWithoutSuffix = parts[index - 1].serialize();\n            const suffixPartText = partWithoutSuffix.text;\n            partWithoutSuffix.text = suffixPartText.substring(0, suffixPartText.length - suffix.length);\n            parts[index - 1] = partCreator.deserializePart(partWithoutSuffix);\n        } else {\n            parts.splice(index, 0, partCreator.plain(suffix)); // splice in the later one first to not change offset\n            parts.splice(base, 0, partCreator.plain(prefix));\n            offset += 2; // offset index to account for the two items we just spliced in\n        }\n    });\n\n    replaceRangeAndExpandSelection(range, parts);\n}\n"]}