122 lines
3.4 KiB
Go
122 lines
3.4 KiB
Go
/*
|
|
* Copyright (c) 2014 Kurt Jung (Gmail: kurt.w.jung)
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
package gofpdf
|
|
|
|
// Routines in this file are translated from
|
|
// http://www.fpdf.org/en/script/script97.php
|
|
|
|
type layerType struct {
|
|
name string
|
|
visible bool
|
|
objNum int // object number
|
|
}
|
|
|
|
type layerRecType struct {
|
|
list []layerType
|
|
currentLayer int
|
|
openLayerPane bool
|
|
}
|
|
|
|
func (f *Fpdf) layerInit() {
|
|
f.layer.list = make([]layerType, 0)
|
|
f.layer.currentLayer = -1
|
|
f.layer.openLayerPane = false
|
|
}
|
|
|
|
// AddLayer defines a layer that can be shown or hidden when the document is
|
|
// displayed. name specifies the layer name that the document reader will
|
|
// display in the layer list. visible specifies whether the layer will be
|
|
// initially visible. The return value is an integer ID that is used in a call
|
|
// to BeginLayer().
|
|
func (f *Fpdf) AddLayer(name string, visible bool) (layerID int) {
|
|
layerID = len(f.layer.list)
|
|
f.layer.list = append(f.layer.list, layerType{name: name, visible: visible})
|
|
return
|
|
}
|
|
|
|
// BeginLayer is called to begin adding content to the specified layer. All
|
|
// content added to the page between a call to BeginLayer and a call to
|
|
// EndLayer is added to the layer specified by id. See AddLayer for more
|
|
// details.
|
|
func (f *Fpdf) BeginLayer(id int) {
|
|
f.EndLayer()
|
|
if id >= 0 && id < len(f.layer.list) {
|
|
f.outf("/OC /OC%d BDC", id)
|
|
f.layer.currentLayer = id
|
|
}
|
|
}
|
|
|
|
// EndLayer is called to stop adding content to the currently active layer. See
|
|
// BeginLayer for more details.
|
|
func (f *Fpdf) EndLayer() {
|
|
if f.layer.currentLayer >= 0 {
|
|
f.out("EMC")
|
|
f.layer.currentLayer = -1
|
|
}
|
|
}
|
|
|
|
// OpenLayerPane advises the document reader to open the layer pane when the
|
|
// document is initially displayed.
|
|
func (f *Fpdf) OpenLayerPane() {
|
|
f.layer.openLayerPane = true
|
|
}
|
|
|
|
func (f *Fpdf) layerEndDoc() {
|
|
if len(f.layer.list) > 0 {
|
|
if f.pdfVersion < "1.5" {
|
|
f.pdfVersion = "1.5"
|
|
}
|
|
}
|
|
}
|
|
|
|
func (f *Fpdf) layerPutLayers() {
|
|
for j, l := range f.layer.list {
|
|
f.newobj()
|
|
f.layer.list[j].objNum = f.n
|
|
f.outf("<</Type /OCG /Name %s>>", f.textstring(utf8toutf16(l.name)))
|
|
f.out("endobj")
|
|
}
|
|
}
|
|
|
|
func (f *Fpdf) layerPutResourceDict() {
|
|
if len(f.layer.list) > 0 {
|
|
f.out("/Properties <<")
|
|
for j, layer := range f.layer.list {
|
|
f.outf("/OC%d %d 0 R", j, layer.objNum)
|
|
}
|
|
f.out(">>")
|
|
}
|
|
|
|
}
|
|
|
|
func (f *Fpdf) layerPutCatalog() {
|
|
if len(f.layer.list) > 0 {
|
|
onStr := ""
|
|
offStr := ""
|
|
for _, layer := range f.layer.list {
|
|
onStr += sprintf("%d 0 R ", layer.objNum)
|
|
if !layer.visible {
|
|
offStr += sprintf("%d 0 R ", layer.objNum)
|
|
}
|
|
}
|
|
f.outf("/OCProperties <</OCGs [%s] /D <</OFF [%s] /Order [%s]>>>>", onStr, offStr, onStr)
|
|
if f.layer.openLayerPane {
|
|
f.out("/PageMode /UseOC")
|
|
}
|
|
}
|
|
}
|