--- /dev/null
+"use strict";
+var Exception = require("../exception")["default"];
+
+function stripFlags(open, close) {
+ return {
+ left: open.charAt(2) === '~',
+ right: close.charAt(close.length-3) === '~'
+ };
+}
+
+exports.stripFlags = stripFlags;
+function prepareBlock(mustache, program, inverseAndProgram, close, inverted, locInfo) {
+ /*jshint -W040 */
+ if (mustache.sexpr.id.original !== close.path.original) {
+ throw new Exception(mustache.sexpr.id.original + ' doesn\'t match ' + close.path.original, mustache);
+ }
+
+ var inverse = inverseAndProgram && inverseAndProgram.program;
+
+ var strip = {
+ left: mustache.strip.left,
+ right: close.strip.right,
+
+ // Determine the standalone candiacy. Basically flag our content as being possibly standalone
+ // so our parent can determine if we actually are standalone
+ openStandalone: isNextWhitespace(program.statements),
+ closeStandalone: isPrevWhitespace((inverse || program).statements)
+ };
+
+ if (mustache.strip.right) {
+ omitRight(program.statements, null, true);
+ }
+
+ if (inverse) {
+ var inverseStrip = inverseAndProgram.strip;
+
+ if (inverseStrip.left) {
+ omitLeft(program.statements, null, true);
+ }
+ if (inverseStrip.right) {
+ omitRight(inverse.statements, null, true);
+ }
+ if (close.strip.left) {
+ omitLeft(inverse.statements, null, true);
+ }
+
+ // Find standalone else statments
+ if (isPrevWhitespace(program.statements)
+ && isNextWhitespace(inverse.statements)) {
+
+ omitLeft(program.statements);
+ omitRight(inverse.statements);
+ }
+ } else {
+ if (close.strip.left) {
+ omitLeft(program.statements, null, true);
+ }
+ }
+
+ if (inverted) {
+ return new this.BlockNode(mustache, inverse, program, strip, locInfo);
+ } else {
+ return new this.BlockNode(mustache, program, inverse, strip, locInfo);
+ }
+}
+
+exports.prepareBlock = prepareBlock;
+function prepareProgram(statements, isRoot) {
+ for (var i = 0, l = statements.length; i < l; i++) {
+ var current = statements[i],
+ strip = current.strip;
+
+ if (!strip) {
+ continue;
+ }
+
+ var _isPrevWhitespace = isPrevWhitespace(statements, i, isRoot, current.type === 'partial'),
+ _isNextWhitespace = isNextWhitespace(statements, i, isRoot),
+
+ openStandalone = strip.openStandalone && _isPrevWhitespace,
+ closeStandalone = strip.closeStandalone && _isNextWhitespace,
+ inlineStandalone = strip.inlineStandalone && _isPrevWhitespace && _isNextWhitespace;
+
+ if (strip.right) {
+ omitRight(statements, i, true);
+ }
+ if (strip.left) {
+ omitLeft(statements, i, true);
+ }
+
+ if (inlineStandalone) {
+ omitRight(statements, i);
+
+ if (omitLeft(statements, i)) {
+ // If we are on a standalone node, save the indent info for partials
+ if (current.type === 'partial') {
+ current.indent = (/([ \t]+$)/).exec(statements[i-1].original) ? RegExp.$1 : '';
+ }
+ }
+ }
+ if (openStandalone) {
+ omitRight((current.program || current.inverse).statements);
+
+ // Strip out the previous content node if it's whitespace only
+ omitLeft(statements, i);
+ }
+ if (closeStandalone) {
+ // Always strip the next node
+ omitRight(statements, i);
+
+ omitLeft((current.inverse || current.program).statements);
+ }
+ }
+
+ return statements;
+}
+
+exports.prepareProgram = prepareProgram;function isPrevWhitespace(statements, i, isRoot) {
+ if (i === undefined) {
+ i = statements.length;
+ }
+
+ // Nodes that end with newlines are considered whitespace (but are special
+ // cased for strip operations)
+ var prev = statements[i-1],
+ sibling = statements[i-2];
+ if (!prev) {
+ return isRoot;
+ }
+
+ if (prev.type === 'content') {
+ return (sibling || !isRoot ? (/\r?\n\s*?$/) : (/(^|\r?\n)\s*?$/)).test(prev.original);
+ }
+}
+function isNextWhitespace(statements, i, isRoot) {
+ if (i === undefined) {
+ i = -1;
+ }
+
+ var next = statements[i+1],
+ sibling = statements[i+2];
+ if (!next) {
+ return isRoot;
+ }
+
+ if (next.type === 'content') {
+ return (sibling || !isRoot ? (/^\s*?\r?\n/) : (/^\s*?(\r?\n|$)/)).test(next.original);
+ }
+}
+
+// Marks the node to the right of the position as omitted.
+// I.e. {{foo}}' ' will mark the ' ' node as omitted.
+//
+// If i is undefined, then the first child will be marked as such.
+//
+// If mulitple is truthy then all whitespace will be stripped out until non-whitespace
+// content is met.
+function omitRight(statements, i, multiple) {
+ var current = statements[i == null ? 0 : i + 1];
+ if (!current || current.type !== 'content' || (!multiple && current.rightStripped)) {
+ return;
+ }
+
+ var original = current.string;
+ current.string = current.string.replace(multiple ? (/^\s+/) : (/^[ \t]*\r?\n?/), '');
+ current.rightStripped = current.string !== original;
+}
+
+// Marks the node to the left of the position as omitted.
+// I.e. ' '{{foo}} will mark the ' ' node as omitted.
+//
+// If i is undefined then the last child will be marked as such.
+//
+// If mulitple is truthy then all whitespace will be stripped out until non-whitespace
+// content is met.
+function omitLeft(statements, i, multiple) {
+ var current = statements[i == null ? statements.length - 1 : i - 1];
+ if (!current || current.type !== 'content' || (!multiple && current.leftStripped)) {
+ return;
+ }
+
+ // We omit the last node if it's whitespace only and not preceeded by a non-content node.
+ var original = current.string;
+ current.string = current.string.replace(multiple ? (/\s+$/) : (/[ \t]+$/), '');
+ current.leftStripped = current.string !== original;
+ return current.leftStripped;
+}
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