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When formatting with MD enabled, move selection inside ** or equivalent

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Fixes https://github.com/vector-im/riot-web/issues/3225

Also insert `\n` after code-block and blockquote to fix https://github.com/vector-im/riot-web/issues/2746
This commit is contained in:
Luke Barnard 2017-07-03 15:23:24 +01:00
parent 0864ad9c8a
commit 86889b8e8c
1 changed files with 38 additions and 5 deletions
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43
src/components/views/rooms/MessageComposerInput.js
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@ -403,26 +403,59 @@ export default class MessageComposerInput extends React.Component {
}); });
} }
} else { } else {
let contentState = this.state.editorState.getCurrentContent(), let contentState = this.state.editorState.getCurrentContent();
selection = this.state.editorState.getSelection();
const modifyFn = { const modifyFn = {
'bold': (text) => `**${text}**`, 'bold': (text) => `**${text}**`,
'italic': (text) => `*${text}*`, 'italic': (text) => `*${text}*`,
'underline': (text) => `_${text}_`, // there's actually no valid underline in Markdown, but *shrug* 'underline': (text) => `_${text}_`, // there's actually no valid underline in Markdown, but *shrug*
'strike': (text) => `<del>${text}</del>`, 'strike': (text) => `<del>${text}</del>`,
'code-block': (text) => `\`\`\`\n${text}\n\`\`\``, 'code-block': (text) => `\`\`\`\n${text}\n\`\`\`\n`,
'blockquote': (text) => text.split('\n').map((line) => `> ${line}\n`).join(''), 'blockquote': (text) => text.split('\n').map((line) => `> ${line}\n`).join('') + '\n',
'unordered-list-item': (text) => text.split('\n').map((line) => `\n- ${line}`).join(''), 'unordered-list-item': (text) => text.split('\n').map((line) => `\n- ${line}`).join(''),
'ordered-list-item': (text) => text.split('\n').map((line, i) => `\n${i + 1}. ${line}`).join(''), 'ordered-list-item': (text) => text.split('\n').map((line, i) => `\n${i + 1}. ${line}`).join(''),
}[command]; }[command];
const selectionAfterOffset = {
'bold': -2,
'italic': -1,
'underline': -1,
'strike': -6,
'code-block': -5,
'blockquote': -2,
}[command];
// Returns a function that collapses a selectionState to its end and moves it by offset
const collapseAndOffsetSelection = (selectionState, offset) => {
const key = selectionState.getEndKey();
return new SelectionState({
anchorKey: key, anchorOffset: offset,
focusKey: key, focusOffset: offset,
});
};
if (modifyFn) { if (modifyFn) {
const previousSelection = this.state.editorState.getSelection();
const newContentState = RichText.modifyText(contentState, previousSelection, modifyFn);
newState = EditorState.push( newState = EditorState.push(
this.state.editorState, this.state.editorState,
RichText.modifyText(contentState, selection, modifyFn), newContentState,
'insert-characters', 'insert-characters',
); );
let newSelection = newContentState.getSelectionAfter();
// If the selection range is 0, move the cursor inside the formatted body
if (previousSelection.getStartOffset() === previousSelection.getEndOffset() &&
previousSelection.getStartKey() === previousSelection.getEndKey() &&
selectionAfterOffset !== undefined
) {
const selectedBlock = newContentState.getBlockForKey(previousSelection.getAnchorKey());
const blockLength = selectedBlock.getText().length;
const newOffset = blockLength + selectionAfterOffset;
newSelection = collapseAndOffsetSelection(newSelection, newOffset);
}
newState = EditorState.forceSelection(newState, newSelection);
} }
} }