diff options
Diffstat (limited to 'deps/npm/node_modules/gauge/render-template.js')
| -rw-r--r-- | deps/npm/node_modules/gauge/render-template.js | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/deps/npm/node_modules/gauge/render-template.js b/deps/npm/node_modules/gauge/render-template.js new file mode 100644 index 0000000000..3261bfbe6f --- /dev/null +++ b/deps/npm/node_modules/gauge/render-template.js @@ -0,0 +1,181 @@ +'use strict' +var align = require('wide-align') +var validate = require('aproba') +var objectAssign = require('object-assign') +var wideTruncate = require('./wide-truncate') +var error = require('./error') +var TemplateItem = require('./template-item') + +function renderValueWithValues (values) { + return function (item) { + return renderValue(item, values) + } +} + +var renderTemplate = module.exports = function (width, template, values) { + var items = prepareItems(width, template, values) + var rendered = items.map(renderValueWithValues(values)).join('') + return align.left(wideTruncate(rendered, width), width) +} + +function preType (item) { + var cappedTypeName = item.type[0].toUpperCase() + item.type.slice(1) + return 'pre' + cappedTypeName +} + +function postType (item) { + var cappedTypeName = item.type[0].toUpperCase() + item.type.slice(1) + return 'post' + cappedTypeName +} + +function hasPreOrPost (item, values) { + if (!item.type) return + return values[preType(item)] || values[postType(item)] +} + +function generatePreAndPost (baseItem, parentValues) { + var item = objectAssign({}, baseItem) + var values = Object.create(parentValues) + var template = [] + var pre = preType(item) + var post = postType(item) + if (values[pre]) { + template.push({value: values[pre]}) + values[pre] = null + } + item.minLength = null + item.length = null + item.maxLength = null + template.push(item) + values[item.type] = values[item.type] + if (values[post]) { + template.push({value: values[post]}) + values[post] = null + } + return function ($1, $2, length) { + return renderTemplate(length, template, values) + } +} + +function prepareItems (width, template, values) { + function cloneAndObjectify (item, index, arr) { + var cloned = new TemplateItem(item, width) + var type = cloned.type + if (cloned.value == null) { + if (!(type in values)) { + if (cloned.default == null) { + throw new error.MissingTemplateValue(cloned, values) + } else { + cloned.value = cloned.default + } + } else { + cloned.value = values[type] + } + } + if (cloned.value == null || cloned.value === '') return null + cloned.index = index + cloned.first = index === 0 + cloned.last = index === arr.length - 1 + if (hasPreOrPost(cloned, values)) cloned.value = generatePreAndPost(cloned, values) + return cloned + } + + var output = template.map(cloneAndObjectify).filter(function (item) { return item != null }) + + var outputLength = 0 + var remainingSpace = width + var variableCount = output.length + + function consumeSpace (length) { + if (length > remainingSpace) length = remainingSpace + outputLength += length + remainingSpace -= length + } + + function finishSizing (item, length) { + if (item.finished) throw new error.Internal('Tried to finish template item that was already finished') + if (length === Infinity) throw new error.Internal('Length of template item cannot be infinity') + if (length != null) item.length = length + item.minLength = null + item.maxLength = null + --variableCount + item.finished = true + if (item.length == null) item.length = item.getBaseLength() + if (item.length == null) throw new error.Internal('Finished template items must have a length') + consumeSpace(item.getLength()) + } + + output.forEach(function (item) { + if (!item.kerning) return + var prevPadRight = item.first ? 0 : output[item.index - 1].padRight + if (!item.first && prevPadRight < item.kerning) item.padLeft = item.kerning - prevPadRight + if (!item.last) item.padRight = item.kerning + }) + + // Finish any that have a fixed (literal or intuited) length + output.forEach(function (item) { + if (item.getBaseLength() == null) return + finishSizing(item) + }) + + var resized = 0 + var resizing + var hunkSize + do { + resizing = false + hunkSize = Math.round(remainingSpace / variableCount) + output.forEach(function (item) { + if (item.finished) return + if (!item.maxLength) return + if (item.getMaxLength() < hunkSize) { + finishSizing(item, item.maxLength) + resizing = true + } + }) + } while (resizing && resized++ < output.length) + if (resizing) throw new error.Internal('Resize loop iterated too many times while determining maxLength') + + resized = 0 + do { + resizing = false + hunkSize = Math.round(remainingSpace / variableCount) + output.forEach(function (item) { + if (item.finished) return + if (!item.minLength) return + if (item.getMinLength() >= hunkSize) { + finishSizing(item, item.minLength) + resizing = true + } + }) + } while (resizing && resized++ < output.length) + if (resizing) throw new error.Internal('Resize loop iterated too many times while determining minLength') + + hunkSize = Math.round(remainingSpace / variableCount) + output.forEach(function (item) { + if (item.finished) return + finishSizing(item, hunkSize) + }) + + return output +} + +function renderFunction (item, values, length) { + validate('OON', arguments) + if (item.type) { + return item.value(values, values[item.type + 'Theme'] || {}, length) + } else { + return item.value(values, {}, length) + } +} + +function renderValue (item, values) { + var length = item.getBaseLength() + var value = typeof item.value === 'function' ? renderFunction(item, values, length) : item.value + if (value == null || value === '') return '' + var alignWith = align[item.align] || align.left + var leftPadding = item.padLeft ? align.left('', item.padLeft) : '' + var rightPadding = item.padRight ? align.right('', item.padRight) : '' + var truncated = wideTruncate(String(value), length) + var aligned = alignWith(truncated, length) + return leftPadding + aligned + rightPadding +} |