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6 changes: 3 additions & 3 deletions
6
...ommands/markdown-commands/boldCommand.tsx → src/commands/markdown-commands/bold.tsx
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...mmands/markdown-commands/imageCommand.tsx → src/commands/markdown-commands/image.tsx
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...mands/markdown-commands/italicCommand.tsx → src/commands/markdown-commands/italic.tsx
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...ommands/markdown-commands/linkCommand.tsx → src/commands/markdown-commands/link.tsx
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14 changes: 5 additions & 9 deletions
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...mmands/markdown-commands/quoteCommand.tsx → src/commands/markdown-commands/quote.tsx
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...arkdown-commands/strikeThroughCommand.tsx → ...mands/markdown-commands/strikethrough.tsx
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,113 @@ | ||
| import { TextSection } from "../types/TextSection"; | ||
| import { SelectionRange } from "../types/SelectionRange"; | ||
|
|
||
| /** | ||
| * A list of helpers for manipulating markdown text. | ||
| * These helpers do not interface with a textarea. For that, see | ||
| */ | ||
| export const markdownHelpers = { | ||
| getSurroundingWord: function(text: string, position: number): SelectionRange { | ||
| if (!text) throw Error("Argument 'text' should be truthy"); | ||
|
|
||
| const isWordDelimiter = (c: string) => c === " " || c.charCodeAt(0) === 10; | ||
|
|
||
| // leftIndex is initialized to 0 because if selection is 0, it won't even enter the iteration | ||
| let start = 0; | ||
| // rightIndex is initialized to text.length because if selection is equal to text.length it won't even enter the interation | ||
| let end = text.length; | ||
|
|
||
| // iterate to the left | ||
| for (let i = position; i - 1 > -1; i--) { | ||
| if (isWordDelimiter(text[i - 1])) { | ||
| start = i; | ||
| break; | ||
| } | ||
| } | ||
|
|
||
| // iterate to the right | ||
| for (let i = position; i < text.length; i++) { | ||
| if (isWordDelimiter(text[i])) { | ||
| end = i; | ||
| break; | ||
| } | ||
| } | ||
|
|
||
| return { start, end }; | ||
| }, | ||
|
|
||
| /** | ||
| * If the cursor is inside a word and (selection.start === selection.end) | ||
| * returns a new Selection where the whole word is selected | ||
| * @param text | ||
| * @param selection | ||
| */ | ||
| selectWord: function({ text, selection }: TextSection): SelectionRange { | ||
| if (text && text.length && selection.start === selection.end) { | ||
| // the user is pointing to a word | ||
| return this.getSurroundingWord(text, selection.start); | ||
| } | ||
| return selection; | ||
| }, | ||
|
|
||
| /** | ||
| * Gets the number of line-breaks that would have to be inserted before the given 'startPosition' | ||
| * to make sure there's an empty line between 'startPosition' and the previous text | ||
| */ | ||
| getBreaksNeededForEmptyLineBefore: function( | ||
| text = "", | ||
| startPosition: number | ||
| ): number { | ||
| if (startPosition === 0) return 0; | ||
|
|
||
| // rules: | ||
| // - If we're in the first line, no breaks are needed | ||
| // - Otherwise there must be 2 breaks before the previous character. Depending on how many breaks exist already, we | ||
| // may need to insert 0, 1 or 2 breaks | ||
|
|
||
| let neededBreaks = 2; | ||
| let isInFirstLine = true; | ||
| for (let i = startPosition - 1; i >= 0 && neededBreaks >= 0; i--) { | ||
| switch (text.charCodeAt(i)) { | ||
| case 32: // blank space | ||
| continue; | ||
| case 10: // line break | ||
| neededBreaks--; | ||
| isInFirstLine = false; | ||
| break; | ||
| default: | ||
| return neededBreaks; | ||
| } | ||
| } | ||
| return isInFirstLine ? 0 : neededBreaks; | ||
| }, | ||
|
|
||
| /** | ||
| * Gets the number of line-breaks that would have to be inserted after the given 'startPosition' | ||
| * to make sure there's an empty line between 'startPosition' and the next text | ||
| */ | ||
| getBreaksNeededForEmptyLineAfter(text = "", startPosition: number): number { | ||
| if (startPosition === text.length - 1) return 0; | ||
|
|
||
| // rules: | ||
| // - If we're in the first line, no breaks are needed | ||
| // - Otherwise there must be 2 breaks before the previous character. Depending on how many breaks exist already, we | ||
| // may need to insert 0, 1 or 2 breaks | ||
|
|
||
| let neededBreaks = 2; | ||
| let isInLastLine = true; | ||
| for (let i = startPosition; i < text.length && neededBreaks >= 0; i++) { | ||
| switch (text.charCodeAt(i)) { | ||
| case 32: | ||
| continue; | ||
| case 10: { | ||
| neededBreaks--; | ||
| isInLastLine = false; | ||
| break; | ||
| } | ||
| default: | ||
| return neededBreaks; | ||
| } | ||
| } | ||
| return isInLastLine ? 0 : neededBreaks; | ||
| } | ||
| }; |
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