Question

我是Reporters和Officer软件包的狂热用户，目前正尝试过渡到Powerpoint工作流程的官员。我使用的幻灯片模板在主服务器中包含幻灯片编号占位符。

使用记者时，我可以使用doc <-addPageNumber( doc )添加幻灯片编号，页码反映每张幻灯片在套牌中的当前位置。我在官员中寻找相同的功能，并在移动幻灯片时寻找适当更新的幻灯片编号。

当我使用ph_with_text(doc, type = "sldNum", str = "slide 1")时，我需要提供带有静态数字或文本的字符串，并且不会根据幻灯片显示在卡片中的位置进行更新。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的幻灯片3位置，幻灯片编号也将显示为2。

我尝试将字符串留空str = ""或ph_empty(type= "sldNum")但这些字符串会产生字符串＆＃34;幻灯片编号＆＃34;出现在幻灯片上。

任何有关正确方向的帮助或指示都将不胜感激！

Answer 1

在遇到人员方面的类似问题，并查看了源代码后，我提出了以下解决方案

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)
}

重要的是

<a:fld id=\"{GUID FROM THE MASTER TEMPLATE}\" type=\"slidenum\">

其中主模板的GUId 需要替换为该字段的Slidemaster布局中的GUID

Answer 2

在我完成演示后，我已经成功使用警官0.3.4和for循环添加了页码。

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'))
}

Answer 3

我来这里的目的是寻求比我更优雅的解决方案，但我认为我至少会提供此解决方案，因为它确实从技术上解决了您/我们的问题，

它可以更轻松地在幻灯片上移动而不必担心幻灯片编号，但是这样做也有些麻烦，即使没有幻灯片编号插槽，您也必须小心增加它（例如就我的“标题”幻灯片而言。）

一种替代方法是为自己编写一个简单的增量运算符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"))

Answer 4

我添加了自己的代码以基于András's answer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)
}

R官员包：添加反映当前幻灯片位置的幻灯片编号

4 个答案: