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library(shiny)
shinyUI(fluidPage(
title = 'Tidy R Code with formatR (Yihui Xie)',
helpText(), # just a placeholder for a little bit top margin
sidebarLayout(
sidebarPanel(
tags$head(
tags$script(src = 'shiny-handler.js'),
tags$style(type = 'text/css', '.popover {max-width: 100%;}')
),
helpText('This Shiny app uses the function', code('tidy_source()'),
'in the', a(href = 'http://yihui.name/formatR', strong('formatR')),
sprintf('(>= v%s)', packageVersion('formatR')),
'package to reformat R code in the text box on the right.',
a(list(icon('hand-o-right'), 'demo'), class = 'btn btn-small btn-info',
onclick = '$("textarea#src").val($("#demo").val()).trigger("change");')),
checkboxInput('arg_comment', 'Preserve comments', TRUE),
checkboxInput('arg_blank', 'Preserve blank lines', TRUE),
checkboxInput('arg_assign', 'Replace = with <-', FALSE),
checkboxInput('arg_brace', 'Put { on a new line', FALSE),
numericInput ('arg_indent', 'Number of spaces for indentation', 4, min = 0),
numericInput ('arg_width', 'Minimum line width', 70, min = 20, max = 500),
submitButton ('Tidy My Code', icon('toggle-right'))
),
mainPanel(
tags$textarea(
id = 'src', rows = 20,
style = 'width: 99%; font-family: monospace; word-wrap: normal; white-space: pre;',
placeholder = 'paste your R code here...'
),
tags$textarea(
id = 'demo', style = 'display: none;',
paste(
readLines(system.file('format', 'messy.R', package = 'formatR')),
collapse = '\n'
)
)
)
)
))
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