Revision df465aa02367bc8bf2fa3f2e3827be5f8713569a authored by Hadley Wickham on 03 December 2021, 09:00:02 UTC, committed by cran-robot on 03 December 2021, 09:00:02 UTC
1 parent be39bf7
render.R
#' Render page with template
#'
#' Each page is composed of four templates: "head", "header", "content", and
#' "footer". Each of these templates is rendered using the `data`, and
#' then assembled into an overall page using the "layout" template.
#'
#' @param pkg Path to package to document.
#' @param name Name of the template (e.g. "home", "vignette", "news")
#' @param data Data for the template.
#'
#' This is automatically supplemented with three lists:
#'
#' * `site`: `title` and path to `root`.
#' * `yaml`: the `template` key from `_pkgdown.yml`.
#' * `package`: package metadata including `name` and`version`.
#'
#' See the full contents by running [data_template()].
#' @param path Location to create file; relative to destination directory.
#' If `""` (the default), prints to standard out.
#' @param depth Depth of path relative to base directory.
#' @param quiet If `quiet`, will suppress output messages
#' @export
render_page <- function(pkg = ".", name, data, path = "", depth = NULL, quiet = FALSE) {
pkg <- as_pkgdown(pkg)
if (is.null(depth)) {
depth <- length(strsplit(path, "/")[[1]]) - 1L
}
html <- render_page_html(pkg, name = name, data = data, depth = depth)
tweak_page(html, name, pkg = pkg)
if (pkg$bs_version > 3) {
activate_navbar(html, data$output_file %||% path, pkg)
}
rendered <- as.character(html, options = character())
write_if_different(pkg, rendered, path, quiet = quiet)
}
render_page_html <- function(pkg, name, data = list(), depth = 0L) {
data <- utils::modifyList(data_template(pkg, depth = depth), data)
# render template components
pieces <- c(
"head",
"in-header",
"before-body",
"navbar",
"content",
"footer",
"after-body",
if (pkg$bs_version == 3) c("header", "docsearch")
)
templates <- purrr::map_chr(pieces, find_template, name = name, pkg = pkg)
components <- purrr::map(templates, render_template, data = data)
components <- purrr::set_names(components, pieces)
components$template <- name
components$lang <- pkg$lang
components$translate <- data$translate
# render complete layout
template <- find_template("layout", name, pkg = pkg)
rendered <- render_template(template, components)
xml2::read_html(rendered, encoding = "UTF-8")
}
#' @export
#' @rdname render_page
data_template <- function(pkg = ".", depth = 0L) {
pkg <- as_pkgdown(pkg)
out <- list()
# Basic metadata
out$package <- list(
name = pkg$package,
version = as.character(pkg$version)
)
out$logo <- list(src = logo_path(pkg, depth = depth))
out$site <- list(
root = up_path(depth),
title = pkg$meta$title %||% pkg$package
)
out$year <- strftime(Sys.time(), "%Y")
# Language and translations
out$lang <- pkg$lang
out$translate <- list(
skip = tr_("Skip to contents"),
toggle_nav = tr_("Toggle navigation"),
search_for = tr_("Search for"),
on_this_page = tr_("On this page"),
source = tr_("Source"),
abstract = tr_("Abstract"),
authors = tr_("Authors"),
version = tr_("Version"),
examples = tr_("Examples"),
citation = tr_("Citation")
)
# Components that mostly end up in the <head>
out$has_favicons <- has_favicons(pkg)
out$opengraph <- data_open_graph(pkg)
out$extra <- list(
css = path_first_existing(pkg$src_path, "pkgdown", "extra.css"),
js = path_first_existing(pkg$src_path, "pkgdown", "extra.js")
)
out$includes <- purrr::pluck(pkg, "meta", "template", "includes", .default = list())
out$yaml <- purrr::pluck(pkg, "meta", "template", "params", .default = list())
# Force inclusion so you can reliably refer to objects inside yaml
# in the mustache templates
out$yaml$.present <- TRUE
if (pkg$bs_version > 3) {
out$headdeps <- data_deps(pkg = pkg, depth = depth)
}
# Development settings; tooltip needs to be generated at render time
out$development <- pkg$development
out$development$version_tooltip <- version_tooltip(pkg$development$mode)
out$navbar <- data_navbar(pkg, depth = depth)
out$footer <- data_footer(pkg)
print_yaml(out)
}
data_open_graph <- function(pkg = ".") {
pkg <- as_pkgdown(pkg)
og <- pkg$meta$template$opengraph %||% list()
og <- check_open_graph(og)
if (is.null(og$image) && !is.null(find_logo(pkg$src_path))) {
og$image <- list(src = path_file(find_logo(pkg$src_path)))
}
if (!is.null(og$image) && !grepl("^http", og$image$src)) {
site_url <- pkg$meta$url %||% "/"
if (!grepl("/$", site_url)) {
site_url <- paste0(site_url, "/")
}
og$image$src <- gsub("^man/figures/", "reference/figures/", og$image$src)
og$image$src <- paste0(site_url, og$image$src)
}
og$twitter$creator <- og$twitter$creator %||% og$twitter$site
og$twitter$site <- og$twitter$site %||% og$twitter$creator
og
}
check_open_graph <- function(og) {
if (!is.list(og)) {
abort(paste("`opengraph` must be a list, not", friendly_type_of(og)))
}
supported_fields <- c("image", "twitter")
unsupported_fields <- setdiff(names(og), supported_fields)
if (length(unsupported_fields)) {
warn(paste0(
"Unsupported `opengraph` field(s): ",
paste(unsupported_fields, collapse = ", ")
))
}
if ("twitter" %in% names(og)) {
if (is.character(og$twitter) && length(og$twitter) == 1 && grepl("^@", og$twitter)) {
abort(paste(
"The `opengraph: twitter` option must be a list. Did you mean this?",
"opengraph:",
" twitter:",
paste(" creator:", og$twitter),
sep = "\n"
))
}
if (!is.list(og$twitter)) {
abort("The `opengraph: twitter` option must be a list.")
}
if (is.null(og$twitter$creator) && is.null(og$twitter$site)) {
abort(
"The `opengraph: twitter` option must include either 'creator' or 'site'."
)
}
}
if ("image" %in% names(og)) {
if (is.character(og$image) && length(og$image) == 1) {
abort(paste(
"The `opengraph: image` option must be a list. Did you mean this?",
"opengraph",
" image:",
paste(" src:", og$image),
sep = "\n"
))
}
if (!is.list(og$image)) {
abort("The `opengraph: image` option must be a list.")
}
}
og[intersect(supported_fields, names(og))]
}
render_template <- function(path, data) {
template <- read_file(path)
if (length(template) == 0)
return("")
whisker::whisker.render(template, data)
}
write_if_different <- function(pkg, contents, path, quiet = FALSE, check = TRUE) {
# Almost all uses are relative to destination, except for rmarkdown templates
full_path <- path_abs(path, start = pkg$dst_path)
if (check && !made_by_pkgdown(full_path)) {
if (!quiet) {
message("Skipping '", path, "': not generated by pkgdown")
}
return(FALSE)
}
if (same_contents(full_path, contents)) {
# touching the file to update its modification time
# which is important for proper lazy behavior
fs::file_touch(full_path)
return(FALSE)
}
if (!quiet) {
cat_line("Writing ", dst_path(path))
}
write_lines(contents, path = full_path)
TRUE
}
same_contents <- function(path, contents) {
if (!file_exists(path))
return(FALSE)
new_hash <- digest::digest(contents, serialize = FALSE)
cur_contents <- paste0(read_lines(path), collapse = "\n")
cur_hash <- digest::digest(cur_contents, serialize = FALSE)
identical(new_hash, cur_hash)
}
file_digest <- function(path) {
if (file_exists(path)) {
digest::digest(file = path, algo = "xxhash64")
} else {
"MISSING"
}
}
made_by_pkgdown <- function(path) {
if (!file_exists(path)) return(TRUE)
first <- paste(read_lines(path, n = 2), collapse = "\n")
check_made_by(first)
}
check_made_by <- function(first) {
if (length(first) == 0L) return(FALSE)
grepl("<!-- Generated by pkgdown", first, fixed = TRUE)
}
Computing file changes ...
