[英]Add slides based on slide position numbers using officer package
[英]R officer package: Add slide numbers that reflect current slide position
我是 Reporters 和Officer 软件包的狂热用户,目前正在尝试过渡到Officer 的Powerpoint 工作流程。 我使用的幻灯片模板在母版中包含幻灯片编号占位符。
使用 Reporters 时,我可以使用doc <-addPageNumber( doc )
添加幻灯片编号,并且页码反映每张幻灯片在幻灯片中的当前位置。 我正在 Office 中寻找相同的功能,并寻找在移动幻灯片时适当更新的幻灯片编号。
当我使用ph_with_text(doc, type = "sldNum", str = "slide 1")
,我需要提供一个带有静态数字或文本的字符串,并且它不会根据幻灯片在幻灯片中出现的位置进行更新。 例如,如果我知道我的幻灯片将是幻灯片 2,我可以输入str = "2"
,但是即使我将该幻灯片移动到演示文稿中幻灯片 3 的位置,幻灯片编号也会读取为 2。
我尝试使用str = ""
或ph_empty(type= "sldNum")
将字符串留空,但这会导致幻灯片上出现字符串“幻灯片编号”。
任何正确方向的帮助或指示将不胜感激!
完成演示后,我已使用带有 for 循环的官员 0.3.4 成功添加了页码。
library(officer)
library(magrittr)
my_pres <- read_pptx() %>%
add_slide('Title Only', 'Office Theme') %>%
ph_with(value = 'Slide 2 Title', location = ph_location_type(type = "title")) %>%
add_slide('Title Only', 'Office Theme') %>%
ph_with(value = 'Slide 3 Title', location = ph_location_type(type = 'title'))
# add slide numbers starting on slide 2
n_slides <- length(my_pres)
for (i_slide in 2:n_slides) {
my_pres <- my_pres %>%
on_slide(index = i_slide) %>%
ph_with(value = i_slide, location = ph_location_type('sldNum'))
}
在与官员面临类似问题并查看源代码后,我想出了以下解决方案
ph_with_text_fld(doc, type = "sldNum", str = "2")
该函数的代码如下:
library(htmltools)
library(xml2)
ph_with_text_fld <- function( x, str, type = "title", index = 1 ){
stopifnot( type %in% c("ctrTitle", "subTitle", "dt", "ftr", "sldNum", "title", "body") )
slide <- x$slide$get_slide(x$cursor)
sh_pr_df <- slide$get_xfrm(type = type, index = index)
sh_pr_df$str <- str
xml_elt <- do.call(pml_shape_str_fld, sh_pr_df)
node <- as_xml_document(xml_elt)
xml_add_child(xml_find_first(slide$get(), "//p:spTree"), node)
slide$fortify_id()
x
}
pml_shape_str_fld <- function(str, ph, offx, offy, cx, cy, ...) {
sp_pr <- sprintf("<p:spPr><a:xfrm><a:off x=\"%.0f\" y=\"%.0f\"/><a:ext cx=\"%.0f\" cy=\"%.0f\"/></a:xfrm></p:spPr>", offx, offy, cx, cy)
# sp_pr <- "<p:spPr/>"
nv_sp_pr <- "<p:nvSpPr><p:cNvPr id=\"\" name=\"\"/><p:cNvSpPr><a:spLocks noGrp=\"1\"/></p:cNvSpPr><p:nvPr>%s</p:nvPr></p:nvSpPr>"
nv_sp_pr <- sprintf( nv_sp_pr, ifelse(!is.na(ph), ph, "") )
paste0( pml_with_ns("p:sp"),
nv_sp_pr, sp_pr,
"<p:txBody><a:bodyPr/><a:lstStyle/><a:p><a:fld id=\"{GUID FROM THE MASTER TEMPLATE}\" type=\"slidenum\"><a:rPr/><a:t>",
htmlEscape(str),
"</a:t></a:fld></a:p></p:txBody></p:sp>"
)
}
pml_with_ns <- function(x){
base_ns <- "xmlns:a=\"http://schemas.openxmlformats.org/drawingml/2006/main\" xmlns:r=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships\" xmlns:p=\"http://schemas.openxmlformats.org/presentationml/2006/main\""
sprintf("<%s %s>", x, base_ns)
}
重要的部分是
<a:fld id=\"{GUID FROM THE MASTER TEMPLATE}\" type=\"slidenum\">
其中主模板中的GUID需要替换为该字段的 Slidemaster 布局中的 GUID
我来这里是为了寻找一个比我更优雅的解决方案,但我想我至少会提供这个,因为它确实在技术上解决了你/我们的问题,只是不雅。
它可以更轻松地在幻灯片中移动而无需担心幻灯片编号,但它也有点笨拙,即使您没有幻灯片编号槽,您也必须小心地增加它(如在这种情况下)我的“标题”幻灯片)。
另一种方法是为自己编写一个简单的增量运算符 a la this question 。
presentation_name_here <- officer::read_pptx("Presentations/Template.pptx")
slide_number <- 1
# Title slide -----------------------------------------------------------
presentation_name_here <- presentation_name_here %>%
add_slide(layout = "Title Slide", master = "Office Theme") %>%
ph_with(value = "Title", location = ph_location_label(ph_label = "Title")) %>%
slide_number <- slide_number + 1
# Executive summary -----------------------------------------------------
presentation_name_here <- presentation_name_here %>%
add_slide(layout = "Title and Content", master = "Office Theme") %>%
ph_with(value = "Executive summary", location = ph_location_label(ph_label = "Title")) %>%
ph_with(value = slide_number, location = ph_location_label(ph_label = "Slide Number")) %>%
slide_number <- slide_number + 1
# Dashboard ---------------------------------------------------------------
presentation_name_here <- presentation_name_here %>%
add_slide(layout = "Title and Content", master = "Office Theme") %>%
ph_with(value = "Dashboard", location = ph_location_label(ph_label = "Title")) %>%
ph_with(value = slide_number, location = ph_location_label(ph_label = "Slide Number"))
我添加了自己的代码来根据András 的回答查找 GUID:
get.guid = function(doc, xml.file){
xml.file.path = doc$slideLayouts$.__enclos_env__$private$collection[[xml.file]]$file_name()
layout.xml = read_xml(xml.file.path)
layout.xml %>%
xml_find_first("//a:fld[@type=\"slidenum\"]") %>%
xml_attr("id")
}
ph_with_text_fld <- function( x, str, type = "title", index = 1, slide_layout_name){
stopifnot( type %in% c("ctrTitle", "subTitle", "dt", "ftr", "sldNum", "title", "body") )
slide <- x$slide$get_slide(x$cursor)
xml.file = slide$get_metadata()$layout_file %>% basename
guid = get.guid(x, xml.file)
sh_pr_df <- slide$get_xfrm(type = type, index = index)
sh_pr_df$str <- str
sh_pr_df$guid <- guid
xml_elt <- do.call(pml_shape_str_fld, sh_pr_df)
node <- as_xml_document(xml_elt)
xml_add_child(xml_find_first(slide$get(), "//p:spTree"), node)
slide$fortify_id()
x
}
pml_shape_str_fld <- function(str, ph, offx, offy, cx, cy, guid, ...) {
sp_pr <- sprintf("<p:spPr><a:xfrm><a:off x=\"%.0f\" y=\"%.0f\"/><a:ext cx=\"%.0f\" cy=\"%.0f\"/></a:xfrm></p:spPr>", offx, offy, cx, cy)
# sp_pr <- "<p:spPr/>"
nv_sp_pr <- "<p:nvSpPr><p:cNvPr id=\"\" name=\"\"/><p:cNvSpPr><a:spLocks noGrp=\"1\"/></p:cNvSpPr><p:nvPr>%s</p:nvPr></p:nvSpPr>"
nv_sp_pr <- sprintf( nv_sp_pr, ifelse(!is.na(ph), ph, "") )
paste0( pml_with_ns("p:sp"),
nv_sp_pr, sp_pr,
"<p:txBody><a:bodyPr/><a:lstStyle/><a:p><a:fld id=\"", guid, "\" type=\"slidenum\"><a:rPr/><a:t>",
htmlEscape(str),
"</a:t></a:fld></a:p></p:txBody></p:sp>"
)
}
pml_with_ns <- function(x){
base_ns <- "xmlns:a=\"http://schemas.openxmlformats.org/drawingml/2006/main\" xmlns:r=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships\" xmlns:p=\"http://schemas.openxmlformats.org/presentationml/2006/main\""
sprintf("<%s %s>", x, base_ns)
}
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