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JSX: Respect original spacing and newlines better #336

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merged 1 commit into from
Sep 20, 2013
Merged

JSX: Respect original spacing and newlines better #336

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27 changes: 15 additions & 12 deletions vendor/fbtransform/transforms/react.js
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@
var Syntax = require('esprima-fb').Syntax;

var catchup = require('jstransform/src/utils').catchup;
var catchupWhiteSpace = require('jstransform/src/utils').catchupWhiteSpace;
var append = require('jstransform/src/utils').append;
var move = require('jstransform/src/utils').move;
var getDocblock = require('jstransform/src/utils').getDocblock;
Expand Down Expand Up @@ -110,19 +111,21 @@ function visitReactTag(traverse, object, path, state) {
if (!isLast) {
append(',', state);
}
} else if (JSX_ATTRIBUTE_TRANSFORMS[attr.name.name]) {
move(attr.value.range[0], state);
append(JSX_ATTRIBUTE_TRANSFORMS[attr.name.name](attr), state);
move(attr.value.range[1], state);
if (!isLast) {
append(',', state);
}
} else if (attr.value.type === Syntax.Literal) {
move(attr.value.range[0], state);
renderXJSLiteral(attr.value, isLast, state);
} else {
move(attr.value.range[0], state);
renderXJSExpressionContainer(traverse, attr.value, isLast, path, state);
move(attr.name.range[1], state);
// Use catchupWhiteSpace to skip over the '=' in the attribute
catchupWhiteSpace(attr.value.range[0], state);
if (JSX_ATTRIBUTE_TRANSFORMS[attr.name.name]) {
append(JSX_ATTRIBUTE_TRANSFORMS[attr.name.name](attr), state);
move(attr.value.range[1], state);
if (!isLast) {
append(',', state);
}
} else if (attr.value.type === Syntax.Literal) {
renderXJSLiteral(attr.value, isLast, state);
} else {
renderXJSExpressionContainer(traverse, attr.value, isLast, path, state);
}
}

if (isLast) {
Expand Down
12 changes: 7 additions & 5 deletions vendor/fbtransform/transforms/xjs.js
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Original file line number Diff line number Diff line change
Expand Up @@ -172,6 +172,7 @@ function trimWithSingleSpace(string) {
function renderXJSLiteral(object, isLast, state, start, end) {
/** Added blank check filtering and triming*/
var trimmedChildValue = safeTrim(object.value);
var hasFinalNewLine = false;

if (trimmedChildValue) {
// head whitespace
Expand All @@ -191,7 +192,7 @@ function renderXJSLiteral(object, isLast, state, start, end) {
});

var hasInitialNewLine = initialLines[0] !== lines[0];
var hasFinalNewLine =
hasFinalNewLine =
initialLines[initialLines.length - 1] !== lines[lines.length - 1];

var numLines = lines.length;
Expand All @@ -203,20 +204,18 @@ function renderXJSLiteral(object, isLast, state, start, end) {
} else {
var preString = '';
var postString = '';
var leading = '';
var leading = line.match(/^[ \t]*/)[0];

if (ii === 0) {
if (hasInitialNewLine) {
preString = ' ';
leading = '\n';
leading = '\n' + leading;
}
if (trimmedChildValueWithSpace.substring(0, 1) === ' ') {
// If this is the first line, and the original content starts with
// whitespace, place a single space at the beginning.
preString = ' ';
}
} else {
leading = line.match(/^[ \t]*/)[0];
}
if (!lastLine || trimmedChildValueWithSpace.substr(
trimmedChildValueWithSpace.length - 1, 1) === ' ' ||
Expand Down Expand Up @@ -256,6 +255,9 @@ function renderXJSLiteral(object, isLast, state, start, end) {
}

// tail whitespace
if (hasFinalNewLine) {
append('\n', state);
}
append(object.value.match(/[ \t]*$/)[0], state);
move(object.range[1], state);
}
Expand Down