summaryrefslogtreecommitdiff
path: root/tex/context/base/lpdf-epa.lua
diff options
context:
space:
mode:
Diffstat (limited to 'tex/context/base/lpdf-epa.lua')
-rw-r--r--tex/context/base/lpdf-epa.lua452
1 files changed, 226 insertions, 226 deletions
diff --git a/tex/context/base/lpdf-epa.lua b/tex/context/base/lpdf-epa.lua
index 8d00c8c26..034e6d7e2 100644
--- a/tex/context/base/lpdf-epa.lua
+++ b/tex/context/base/lpdf-epa.lua
@@ -1,226 +1,226 @@
-if not modules then modules = { } end modules ['lpdf-epa'] = {
- version = 1.001,
- comment = "companion to lpdf-epa.mkiv",
- author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
- copyright = "PRAGMA ADE / ConTeXt Development Team",
- license = "see context related readme files"
-}
-
--- This is a rather experimental feature and the code will probably
--- change.
-
-local type, tonumber = type, tonumber
-local format, gsub = string.format, string.gsub
-local formatters = string.formatters
-
------ lpegmatch, lpegpatterns = lpeg.match, lpeg.patterns
-
-local trace_links = false trackers.register("figures.links", function(v) trace_links = v end)
-
-local report_link = logs.reporter("backend","merging")
-
-local backends, lpdf = backends, lpdf
-
-local variables = interfaces.variables
-local codeinjections = backends.pdf.codeinjections
------ urlescaper = lpegpatterns.urlescaper
------ utftohigh = lpegpatterns.utftohigh
-local escapetex = characters.filters.utf.private.escape
-
-local layerspec = { -- predefining saves time
- "epdflinks"
-}
-
-local function makenamespace(filename)
- return format("lpdf-epa-%s-",file.removesuffix(file.basename(filename)))
-end
-
-local function add_link(x,y,w,h,destination,what)
- x = x .. "bp"
- y = y .. "bp"
- w = w .. "bp"
- h = h .. "bp"
- if trace_links then
- report_link("destination %a, type %a, dx %s, dy %s, wd %s, ht %s",destination,what,x,y,w,h)
- end
- local locationspec = { -- predefining saves time
- x = x,
- y = y,
- preset = "leftbottom",
- }
- local buttonspec = {
- width = w,
- height = h,
- offset = variables.overlay,
- frame = trace_links and variables.on or variables.off,
- }
- context.setlayer (
- layerspec,
- locationspec,
- function() context.button ( buttonspec, "", { destination } ) end
- -- context.nested.button(buttonspec, "", { destination }) -- time this
- )
-end
-
-local function link_goto(x,y,w,h,document,annotation,pagedata,namespace)
- local a = annotation.A
- if a then
- local destination = a.D -- [ 18 0 R /Fit ]
- local what = "page"
- if type(destination) == "string" then
- local destinations = document.destinations
- local wanted = destinations[destination]
- destination = wanted and wanted.D
- if destination then what = "named" end
- end
- local pagedata = destination and destination[1]
- if pagedata then
- local destinationpage = pagedata.number
- if destinationpage then
- add_link(x,y,w,h,namespace .. destinationpage,what)
- end
- end
- end
-end
-
-local function link_uri(x,y,w,h,document,annotation)
- local url = annotation.A.URI
- if url then
- -- url = lpegmatch(urlescaper,url)
- -- url = lpegmatch(utftohigh,url)
- url = escapetex(url)
- add_link(x,y,w,h,formatters["url(%s)"](url),"url")
- end
-end
-
-local function link_file(x,y,w,h,document,annotation)
- local a = annotation.A
- if a then
- local filename = a.F
- if filename then
- filename = escapetex(filename)
- local destination = a.D
- if not destination then
- add_link(x,y,w,h,formatters["file(%s)"](filename),"file")
- elseif type(destination) == "string" then
- add_link(x,y,w,h,formatters["%s::%s"](filename,destination),"file (named)")
- else
- destination = destination[1] -- array
- if tonumber(destination) then
- add_link(x,y,w,h,formatters["%s::page(%s)"](filename,destination),"file (page)")
- else
- add_link(x,y,w,h,formatters["file(%s)"](filename),"file")
- end
- end
- end
- end
-end
-
-function codeinjections.mergereferences(specification)
- if figures and not specification then
- specification = figures and figures.current()
- specification = specification and specification.status
- end
- if specification then
- local fullname = specification.fullname
- local document = lpdf.epdf.load(fullname)
- if document then
- local pagenumber = specification.page or 1
- local xscale = specification.yscale or 1
- local yscale = specification.yscale or 1
- local size = specification.size or "crop" -- todo
- local pagedata = document.pages[pagenumber]
- local annotations = pagedata and pagedata.Annots
- if annotations and annotations.n > 0 then
- local namespace = format("lpdf-epa-%s-",file.removesuffix(file.basename(fullname)))
- local reference = namespace .. pagenumber
- local mediabox = pagedata.MediaBox
- local llx, lly, urx, ury = mediabox[1], mediabox[2], mediabox[3], mediabox[4]
- local width, height = xscale * (urx - llx), yscale * (ury - lly) -- \\overlaywidth, \\overlayheight
- context.definelayer( { "epdflinks" }, { height = height.."bp" , width = width.."bp" })
- for i=1,annotations.n do
- local annotation = annotations[i]
- if annotation then
- local subtype = annotation.Subtype
- local rectangle = annotation.Rect
- local a_llx, a_lly, a_urx, a_ury = rectangle[1], rectangle[2], rectangle[3], rectangle[4]
- local x, y = xscale * (a_llx - llx), yscale * (a_lly - lly)
- local w, h = xscale * (a_urx - a_llx), yscale * (a_ury - a_lly)
- if subtype == "Link" then
- local a = annotation.A
- if a then
- local linktype = a.S
- if linktype == "GoTo" then
- link_goto(x,y,w,h,document,annotation,pagedata,namespace)
- elseif linktype == "GoToR" then
- link_file(x,y,w,h,document,annotation)
- elseif linktype == "URI" then
- link_uri(x,y,w,h,document,annotation)
- elseif trace_links then
- report_link("unsupported link annotation %a",linktype)
- end
- else
- report_link("mising link annotation")
- end
- elseif trace_links then
- report_link("unsupported annotation %a",subtype)
- end
- elseif trace_links then
- report_link("broken annotation, index %a",i)
- end
- end
- context.flushlayer { "epdflinks" }
- -- context("\\gdef\\figurereference{%s}",reference) -- global
- context.setgvalue("figurereference",reference) -- global
- if trace_links then
- report_link("setting figure reference to %a",reference)
- end
- specification.reference = reference
- return namespace
- end
- end
- end
- return ""-- no namespace, empty, not nil
-end
-
-function codeinjections.mergeviewerlayers(specification)
- -- todo: parse included page for layers
- if true then
- return
- end
- if not specification then
- specification = figures and figures.current()
- specification = specification and specification.status
- end
- if specification then
- local fullname = specification.fullname
- local document = lpdf.epdf.load(fullname)
- if document then
- local namespace = format("lpdf:epa:%s:",file.removesuffix(file.basename(fullname)))
- local layers = document.layers
- if layers then
- for i=1,layers.n do
- local layer = layers[i]
- if layer then
- local tag = namespace .. gsub(layer," ",":")
- local title = tag
- if trace_links then
- report_link("using layer %a",tag)
- end
- attributes.viewerlayers.define { -- also does some cleaning
- tag = tag, -- todo: #3A or so
- title = title,
- visible = variables.start,
- editable = variables.yes,
- printable = variables.yes,
- }
- codeinjections.useviewerlayer(tag)
- elseif trace_links then
- report_link("broken layer, index %a",i)
- end
- end
- end
- end
- end
-end
-
+if not modules then modules = { } end modules ['lpdf-epa'] = {
+ version = 1.001,
+ comment = "companion to lpdf-epa.mkiv",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+-- This is a rather experimental feature and the code will probably
+-- change.
+
+local type, tonumber = type, tonumber
+local format, gsub = string.format, string.gsub
+local formatters = string.formatters
+
+----- lpegmatch, lpegpatterns = lpeg.match, lpeg.patterns
+
+local trace_links = false trackers.register("figures.links", function(v) trace_links = v end)
+
+local report_link = logs.reporter("backend","merging")
+
+local backends, lpdf = backends, lpdf
+
+local variables = interfaces.variables
+local codeinjections = backends.pdf.codeinjections
+----- urlescaper = lpegpatterns.urlescaper
+----- utftohigh = lpegpatterns.utftohigh
+local escapetex = characters.filters.utf.private.escape
+
+local layerspec = { -- predefining saves time
+ "epdflinks"
+}
+
+local function makenamespace(filename)
+ return format("lpdf-epa-%s-",file.removesuffix(file.basename(filename)))
+end
+
+local function add_link(x,y,w,h,destination,what)
+ x = x .. "bp"
+ y = y .. "bp"
+ w = w .. "bp"
+ h = h .. "bp"
+ if trace_links then
+ report_link("destination %a, type %a, dx %s, dy %s, wd %s, ht %s",destination,what,x,y,w,h)
+ end
+ local locationspec = { -- predefining saves time
+ x = x,
+ y = y,
+ preset = "leftbottom",
+ }
+ local buttonspec = {
+ width = w,
+ height = h,
+ offset = variables.overlay,
+ frame = trace_links and variables.on or variables.off,
+ }
+ context.setlayer (
+ layerspec,
+ locationspec,
+ function() context.button ( buttonspec, "", { destination } ) end
+ -- context.nested.button(buttonspec, "", { destination }) -- time this
+ )
+end
+
+local function link_goto(x,y,w,h,document,annotation,pagedata,namespace)
+ local a = annotation.A
+ if a then
+ local destination = a.D -- [ 18 0 R /Fit ]
+ local what = "page"
+ if type(destination) == "string" then
+ local destinations = document.destinations
+ local wanted = destinations[destination]
+ destination = wanted and wanted.D
+ if destination then what = "named" end
+ end
+ local pagedata = destination and destination[1]
+ if pagedata then
+ local destinationpage = pagedata.number
+ if destinationpage then
+ add_link(x,y,w,h,namespace .. destinationpage,what)
+ end
+ end
+ end
+end
+
+local function link_uri(x,y,w,h,document,annotation)
+ local url = annotation.A.URI
+ if url then
+ -- url = lpegmatch(urlescaper,url)
+ -- url = lpegmatch(utftohigh,url)
+ url = escapetex(url)
+ add_link(x,y,w,h,formatters["url(%s)"](url),"url")
+ end
+end
+
+local function link_file(x,y,w,h,document,annotation)
+ local a = annotation.A
+ if a then
+ local filename = a.F
+ if filename then
+ filename = escapetex(filename)
+ local destination = a.D
+ if not destination then
+ add_link(x,y,w,h,formatters["file(%s)"](filename),"file")
+ elseif type(destination) == "string" then
+ add_link(x,y,w,h,formatters["%s::%s"](filename,destination),"file (named)")
+ else
+ destination = destination[1] -- array
+ if tonumber(destination) then
+ add_link(x,y,w,h,formatters["%s::page(%s)"](filename,destination),"file (page)")
+ else
+ add_link(x,y,w,h,formatters["file(%s)"](filename),"file")
+ end
+ end
+ end
+ end
+end
+
+function codeinjections.mergereferences(specification)
+ if figures and not specification then
+ specification = figures and figures.current()
+ specification = specification and specification.status
+ end
+ if specification then
+ local fullname = specification.fullname
+ local document = lpdf.epdf.load(fullname)
+ if document then
+ local pagenumber = specification.page or 1
+ local xscale = specification.yscale or 1
+ local yscale = specification.yscale or 1
+ local size = specification.size or "crop" -- todo
+ local pagedata = document.pages[pagenumber]
+ local annotations = pagedata and pagedata.Annots
+ if annotations and annotations.n > 0 then
+ local namespace = format("lpdf-epa-%s-",file.removesuffix(file.basename(fullname)))
+ local reference = namespace .. pagenumber
+ local mediabox = pagedata.MediaBox
+ local llx, lly, urx, ury = mediabox[1], mediabox[2], mediabox[3], mediabox[4]
+ local width, height = xscale * (urx - llx), yscale * (ury - lly) -- \\overlaywidth, \\overlayheight
+ context.definelayer( { "epdflinks" }, { height = height.."bp" , width = width.."bp" })
+ for i=1,annotations.n do
+ local annotation = annotations[i]
+ if annotation then
+ local subtype = annotation.Subtype
+ local rectangle = annotation.Rect
+ local a_llx, a_lly, a_urx, a_ury = rectangle[1], rectangle[2], rectangle[3], rectangle[4]
+ local x, y = xscale * (a_llx - llx), yscale * (a_lly - lly)
+ local w, h = xscale * (a_urx - a_llx), yscale * (a_ury - a_lly)
+ if subtype == "Link" then
+ local a = annotation.A
+ if a then
+ local linktype = a.S
+ if linktype == "GoTo" then
+ link_goto(x,y,w,h,document,annotation,pagedata,namespace)
+ elseif linktype == "GoToR" then
+ link_file(x,y,w,h,document,annotation)
+ elseif linktype == "URI" then
+ link_uri(x,y,w,h,document,annotation)
+ elseif trace_links then
+ report_link("unsupported link annotation %a",linktype)
+ end
+ else
+ report_link("mising link annotation")
+ end
+ elseif trace_links then
+ report_link("unsupported annotation %a",subtype)
+ end
+ elseif trace_links then
+ report_link("broken annotation, index %a",i)
+ end
+ end
+ context.flushlayer { "epdflinks" }
+ -- context("\\gdef\\figurereference{%s}",reference) -- global
+ context.setgvalue("figurereference",reference) -- global
+ if trace_links then
+ report_link("setting figure reference to %a",reference)
+ end
+ specification.reference = reference
+ return namespace
+ end
+ end
+ end
+ return ""-- no namespace, empty, not nil
+end
+
+function codeinjections.mergeviewerlayers(specification)
+ -- todo: parse included page for layers
+ if true then
+ return
+ end
+ if not specification then
+ specification = figures and figures.current()
+ specification = specification and specification.status
+ end
+ if specification then
+ local fullname = specification.fullname
+ local document = lpdf.epdf.load(fullname)
+ if document then
+ local namespace = format("lpdf:epa:%s:",file.removesuffix(file.basename(fullname)))
+ local layers = document.layers
+ if layers then
+ for i=1,layers.n do
+ local layer = layers[i]
+ if layer then
+ local tag = namespace .. gsub(layer," ",":")
+ local title = tag
+ if trace_links then
+ report_link("using layer %a",tag)
+ end
+ attributes.viewerlayers.define { -- also does some cleaning
+ tag = tag, -- todo: #3A or so
+ title = title,
+ visible = variables.start,
+ editable = variables.yes,
+ printable = variables.yes,
+ }
+ codeinjections.useviewerlayer(tag)
+ elseif trace_links then
+ report_link("broken layer, index %a",i)
+ end
+ end
+ end
+ end
+ end
+end
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 03:06:05 +0000