genesi

9 files changed, 1188 insertions, 0 deletions

diff --git a/go-poppler/LICENSE.md b/go-poppler/LICENSE.md
new file mode 100644
index 0000000..e96bb63
--- /dev/null
+++ b/go-poppler/LICENSE.md
@@ -0,0 +1,363 @@
+Copyright (c) 2015-2020 Sergey Cherepanov
+
+### GNU GENERAL PUBLIC LICENSE
+
+Version 2, June 1991
+
+    Copyright (C) 1989, 1991 Free Software Foundation, Inc.  
+    51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+
+    Everyone is permitted to copy and distribute verbatim copies
+    of this license document, but changing it is not allowed.
+
+### Preamble
+
+The licenses for most software are designed to take away your freedom
+to share and change it. By contrast, the GNU General Public License is
+intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users. This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it. (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.) You can apply it to
+your programs, too.
+
+When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if
+you distribute copies of the software, or if you modify it.
+
+For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have. You must make sure that they, too, receive or can get the
+source code. And you must show them these terms so they know their
+rights.
+
+We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software. If the software is modified by someone else and passed on,
+we want its recipients to know that what they have is not the
+original, so that any problems introduced by others will not reflect
+on the original authors' reputations.
+
+Finally, any free program is threatened constantly by software
+patents. We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary. To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at
+all.
+
+The precise terms and conditions for copying, distribution and
+modification follow.
+
+### TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+**0.** This License applies to any program or other work which
+contains a notice placed by the copyright holder saying it may be
+distributed under the terms of this General Public License. The
+"Program", below, refers to any such program or work, and a "work
+based on the Program" means either the Program or any derivative work
+under copyright law: that is to say, a work containing the Program or
+a portion of it, either verbatim or with modifications and/or
+translated into another language. (Hereinafter, translation is
+included without limitation in the term "modification".) Each licensee
+is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope. The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the Program
+(independent of having been made by running the Program). Whether that
+is true depends on what the Program does.
+
+**1.** You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a
+fee.
+
+**2.** You may modify your copy or copies of the Program or any
+portion of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+  
+**a)** You must cause the modified files to carry prominent notices
+stating that you changed the files and the date of any change.
+
+  
+**b)** You must cause any work that you distribute or publish, that in
+whole or in part contains or is derived from the Program or any part
+thereof, to be licensed as a whole at no charge to all third parties
+under the terms of this License.
+
+  
+**c)** If the modified program normally reads commands interactively
+when run, you must cause it, when started running for such interactive
+use in the most ordinary way, to print or display an announcement
+including an appropriate copyright notice and a notice that there is
+no warranty (or else, saying that you provide a warranty) and that
+users may redistribute the program under these conditions, and telling
+the user how to view a copy of this License. (Exception: if the
+Program itself is interactive but does not normally print such an
+announcement, your work based on the Program is not required to print
+an announcement.)
+
+These requirements apply to the modified work as a whole. If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works. But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote
+it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+**3.** You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+  
+**a)** Accompany it with the complete corresponding machine-readable
+source code, which must be distributed under the terms of Sections 1
+and 2 above on a medium customarily used for software interchange; or,
+
+  
+**b)** Accompany it with a written offer, valid for at least three
+years, to give any third party, for a charge no more than your cost of
+physically performing source distribution, a complete machine-readable
+copy of the corresponding source code, to be distributed under the
+terms of Sections 1 and 2 above on a medium customarily used for
+software interchange; or,
+
+  
+**c)** Accompany it with the information you received as to the offer
+to distribute corresponding source code. (This alternative is allowed
+only for noncommercial distribution and only if you received the
+program in object code or executable form with such an offer, in
+accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it. For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable. However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+**4.** You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License. Any attempt otherwise
+to copy, modify, sublicense or distribute the Program is void, and
+will automatically terminate your rights under this License. However,
+parties who have received copies, or rights, from you under this
+License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+**5.** You are not required to accept this License, since you have not
+signed it. However, nothing else grants you permission to modify or
+distribute the Program or its derivative works. These actions are
+prohibited by law if you do not accept this License. Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+**6.** Each time you redistribute the Program (or any work based on
+the Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions. You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+**7.** If, as a consequence of a court judgment or allegation of
+patent infringement or for any other reason (not limited to patent
+issues), conditions are imposed on you (whether by court order,
+agreement or otherwise) that contradict the conditions of this
+License, they do not excuse you from the conditions of this License.
+If you cannot distribute so as to satisfy simultaneously your
+obligations under this License and any other pertinent obligations,
+then as a consequence you may not distribute the Program at all. For
+example, if a patent license would not permit royalty-free
+redistribution of the Program by all those who receive copies directly
+or indirectly through you, then the only way you could satisfy both it
+and this License would be to refrain entirely from distribution of the
+Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices. Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+**8.** If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded. In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+**9.** The Free Software Foundation may publish revised and/or new
+versions of the General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Program
+specifies a version number of this License which applies to it and
+"any later version", you have the option of following the terms and
+conditions either of that version or of any later version published by
+the Free Software Foundation. If the Program does not specify a
+version number of this License, you may choose any version ever
+published by the Free Software Foundation.
+
+**10.** If you wish to incorporate parts of the Program into other
+free programs whose distribution conditions are different, write to
+the author to ask for permission. For software which is copyrighted by
+the Free Software Foundation, write to the Free Software Foundation;
+we sometimes make exceptions for this. Our decision will be guided by
+the two goals of preserving the free status of all derivatives of our
+free software and of promoting the sharing and reuse of software
+generally.
+
+**NO WARRANTY**
+
+**11.** BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO
+WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
+EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
+OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY
+KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
+PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
+THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+**12.** IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
+WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
+AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU
+FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
+CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
+PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
+RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
+FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF
+SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+DAMAGES.
+
+### END OF TERMS AND CONDITIONS
+
+### How to Apply These Terms to Your New Programs
+
+If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these
+terms.
+
+To do so, attach the following notices to the program. It is safest to
+attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    one line to give the program's name and an idea of what it does.
+    Copyright (C) yyyy  name of author
+
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; either version 2
+    of the License, or (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+Also add information on how to contact you by electronic and paper
+mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details
+    type `show w'.  This is free software, and you are welcome
+    to redistribute it under certain conditions; type `show c' 
+    for details.
+
+The hypothetical commands \`show w' and \`show c' should show the
+appropriate parts of the General Public License. Of course, the
+commands you use may be called something other than \`show w' and
+\`show c'; they could even be mouse-clicks or menu items--whatever
+suits your program.
+
+You should also get your employer (if you work as a programmer) or
+your school, if any, to sign a "copyright disclaimer" for the program,
+if necessary. Here is a sample; alter the names:
+
+    Yoyodyne, Inc., hereby disclaims all copyright
+    interest in the program `Gnomovision'
+    (which makes passes at compilers) written 
+    by James Hacker.
+
+    signature of Ty Coon, 1 April 1989
+    Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library,
+you may consider it more useful to permit linking proprietary
+applications with the library. If this is what you want to do, use the
+[GNU Lesser General Public
+License](https://www.gnu.org/licenses/lgpl.html) instead of this
+License.
diff --git a/go-poppler/annot.go b/go-poppler/annot.go
new file mode 100644
index 0000000..4527d83
--- /dev/null
+++ b/go-poppler/annot.go
@@ -0,0 +1,194 @@
+package poppler
+
+// #cgo pkg-config: poppler-glib
+// #include <poppler.h>
+// #include <glib.h>
+// #include <cairo.h>
+//
+// /* macro wrappings */
+// gboolean wrap_POPPLER_IS_ANNOT_TEXT_MARKUP(PopplerAnnot *annot){
+//   return POPPLER_IS_ANNOT_TEXT_MARKUP(annot);
+// }
+// PopplerAnnotTextMarkup *wrap_POPPLER_ANNOT_TEXT_MARKUP(PopplerAnnot *annot) {
+//	return POPPLER_ANNOT_TEXT_MARKUP(annot);
+// }
+import "C"
+
+import "unsafe"
+//import "github.com/ungerik/go-cairo"
+
+// DEBUG
+//import "fmt"
+
+type Point struct {
+	X, Y float64
+}
+type Quad struct {
+	P1, P2, P3, P4 Point
+}
+
+type Annot struct {
+	am *C.struct__PopplerAnnotMapping
+}
+
+type AnnotType int
+
+const (
+	AnnotUnknown AnnotType = iota
+	AnnotText
+	AnnotLink
+	AnnotFreeText
+	AnnotLine
+	AnnotSquare
+	AnnotCircle
+	AnnotPolygon
+	AnnotPolyLine
+	AnnotHighlight
+	AnnotUnderline
+	AnnotSquiggly
+	AnnotStrikeOut
+	AnnotStamp
+	AnnotCaret
+	AnnotInk
+	AnnotPopup
+	AnnotFileAttachment
+	AnnotSound
+	AnnotMovie
+	AnnotWidget
+	AnnotScreen
+	AnnotPrinterMark
+	AnnotTrapNet
+	AnnotWatermark
+	Annot3D
+)
+
+type AnnotFlag int
+
+const AnnotFlagUnknown AnnotFlag = 0
+const (
+	AnnotFlagInvisible	AnnotFlag = 1 << iota
+	AnnotFlagHidden
+	AnnotFlagPrint
+	AnnotFlagNoZoom
+	AnnotFlagNoRotate
+	AnnotFlagNoView
+	AnnotFlagReadOnly
+	AnnotFlagLocked
+	AnnotFlagToggleNoView
+	AnnotFlagLockedContents
+)
+
+func (a *Annot) Type() AnnotType {
+	t := C.poppler_annot_get_annot_type(a.am.annot)
+	return AnnotType(t)
+}
+
+func (a *Annot) Index() int {
+	i := C.poppler_annot_get_page_index(a.am.annot)
+	return int(i)
+}
+
+func (a *Annot) Date() string {
+	cText := C.poppler_annot_get_modified(a.am.annot)
+	return C.GoString(cText)
+}
+
+func (a *Annot) Rect() Rectangle {
+	var r C.PopplerRectangle
+	C.poppler_annot_get_rectangle(a.am.annot, &r)
+
+	rect := Rectangle{
+		X1: float64(r.x1),
+		Y1: float64(r.y1),
+		X2: float64(r.x2),
+		Y2: float64(r.y2),
+	}
+
+	return rect
+
+}
+
+func (a *Annot) Color() Color {
+	c := C.poppler_annot_get_color(a.am.annot)
+	if c == nil {
+		return Color{}
+	}
+	defer C.poppler_color_free(c)
+
+	color := Color{
+		R: int(c.red),
+		G: int(c.green),
+		B: int(c.blue),
+	}
+
+	return color
+}
+
+func (a *Annot) Name() string {
+	cText := C.poppler_annot_get_name(a.am.annot)
+	return C.GoString(cText)
+}
+
+func (a *Annot) Contents() string {
+	//if a.am.annot == nil {
+	//return ""
+	//}
+	cText := C.poppler_annot_get_contents(a.am.annot)
+	//fmt.Printf("DEBUG poppler_annot_get_contents returned pointer: %v", cText)
+	if cText == nil {
+		return ""
+	}
+	return C.GoString(cText)
+}
+
+func (a *Annot) Flags() AnnotFlag {
+	f := C.poppler_annot_get_flags(a.am.annot)
+	return AnnotFlag(f)
+}
+
+func (a *Annot) Quads() []Quad {
+	if C.wrap_POPPLER_IS_ANNOT_TEXT_MARKUP(a.am.annot) == C.FALSE {
+		return nil
+	}
+
+
+	textMarkup := C.wrap_POPPLER_ANNOT_TEXT_MARKUP(a.am.annot)
+
+	q := C.poppler_annot_text_markup_get_quadrilaterals(textMarkup)
+
+	quads := gArrayToQuads(q)
+
+	C.g_array_free(q, 1)
+
+	return quads
+}
+
+func (a *Annot) Close() {
+	if a.am != nil {
+		C.poppler_annot_mapping_free(a.am)
+		a.am = nil
+	}
+}
+
+func (a *Annot) SetColor(c Color){
+	pColor := C.poppler_color_new()
+	pColor.red = C.ushort(c.R)
+	pColor.green = C.ushort(c.G)
+	pColor.blue = C.ushort(c.B)
+	defer C.poppler_color_free(pColor)
+
+	C.poppler_annot_set_color(a.am.annot, pColor )
+}
+
+func (a *Annot) SetContents(c string){
+	cStr := C.CString(c)
+	defer C.free(unsafe.Pointer(cStr))
+
+	C.poppler_annot_set_contents(a.am.annot, cStr)
+}
+
+func  (a *Annot) SetFlags(f AnnotFlag){
+	pFlags := C.PopplerAnnotFlag(f)
+
+	C.poppler_annot_set_flags(a.am.annot, pFlags)
+}
diff --git a/go-poppler/document.go b/go-poppler/document.go
new file mode 100644
index 0000000..58365ca
--- /dev/null
+++ b/go-poppler/document.go
@@ -0,0 +1,161 @@
+package poppler
+
+// #cgo pkg-config: poppler-glib
+// #include <poppler.h>
+// #include <stdlib.h>
+// #include <glib.h>
+// #include <unistd.h>
+import "C"
+
+import (
+	"errors"
+	"unsafe"
+	"path/filepath"
+)
+
+type Document struct {
+	doc			poppDoc
+	openedPages		[]*Page
+}
+
+type DocumentInfo struct {
+	PdfVersion		string		`json:"pdf_version,omitempty"`
+	Title			string		`json:"title,omitempty"`
+	Author			string		`json:"author,omitempty"`
+	Subject			string		`json:"subject,omitempty"`
+	KeyWords		string		`json:"keywords,omitempty"`
+	Creator			string		`json:"creator,omitempty"`
+	Producer		string		`json:"producer,omitempty"`
+	Metadata		string		`json:"metadata,omitempty"`
+	CreationDate		int		`json:"creation_date,omitempty"`
+	ModificationDate	int		`json:"modification_date,omitempty"`
+	Pages			int		`json:"pages_number,omitempty"`
+	IsLinearized		bool		`json:"is_linearized,omitempty"`
+}
+
+func (d *Document) Info() DocumentInfo {
+	return DocumentInfo{
+		PdfVersion:       toString(C.poppler_document_get_pdf_version_string(d.doc)),
+		Title:            toString(C.poppler_document_get_title(d.doc)),
+		Author:           toString(C.poppler_document_get_author(d.doc)),
+		Subject:          toString(C.poppler_document_get_subject(d.doc)),
+		KeyWords:         toString(C.poppler_document_get_keywords(d.doc)),
+		Creator:          toString(C.poppler_document_get_creator(d.doc)),
+		Producer:         toString(C.poppler_document_get_producer(d.doc)),
+		Metadata:         toString(C.poppler_document_get_metadata(d.doc)),
+		CreationDate:     int(C.poppler_document_get_creation_date(d.doc)),
+		ModificationDate: int(C.poppler_document_get_modification_date(d.doc)),
+		Pages:            int(C.poppler_document_get_n_pages(d.doc)),
+		IsLinearized:     toBool(C.poppler_document_is_linearized(d.doc)),
+	}
+}
+
+func (d *Document) GetNPages() int {
+	return int(C.poppler_document_get_n_pages(d.doc))
+}
+
+func (d *Document) GetPage(i int) (page *Page) {
+	p := C.poppler_document_get_page(d.doc, C.int(i))
+
+	page = &Page{
+		p:              p,
+		openedAnnots:	nil,
+	}
+	d.openedPages = append(d.openedPages, page)
+
+	return page
+}
+
+func (d *Document) HasAttachments() bool {
+	return toBool(C.poppler_document_has_attachments(d.doc))
+}
+
+func (d *Document) GetNAttachments() int {
+	return int(C.poppler_document_get_n_attachments(d.doc))
+}
+
+func (d *Document) Close() {
+
+	for i := 0; i < len(d.openedPages); i++ {
+		d.openedPages[i].Close()
+	}
+	d.openedPages = []*Page{}
+
+	C.g_object_unref(C.gpointer(d.doc))
+}
+
+
+func (d *Document) NewAnnot(t AnnotType, r Rectangle, q []Quad) (Annot, error) {
+	am := C.poppler_annot_mapping_new();
+
+	annot := Annot {
+		am: am,
+	}
+
+	pRect := rectangleToPopplerRectangle(r)
+
+	pQuad := quadsToGArray(q)
+	defer C.g_array_free(pQuad, 1)
+
+
+	switch (t){
+	case AnnotHighlight:
+		am.annot = C.poppler_annot_text_markup_new_highlight(d.doc, &pRect, pQuad)
+	case AnnotUnderline:
+		am.annot = C.poppler_annot_text_markup_new_underline(d.doc, &pRect, pQuad)
+	case AnnotSquiggly:
+		am.annot = C.poppler_annot_text_markup_new_squiggly(d.doc, &pRect, pQuad)
+	case AnnotStrikeOut:
+		am.annot = C.poppler_annot_text_markup_new_strikeout(d.doc, &pRect, pQuad)
+	default:
+		C.poppler_annot_mapping_free(am)
+		return annot, errors.New("invalid type for new annotation")
+	}
+
+
+	if am.annot == nil {
+		C.poppler_annot_mapping_free(am)
+		return annot, errors.New("failed to create annotation")
+	}
+
+	/* Can't get real annot mapping area as done in
+	 * poppler_page_get_annot_mapping() since page is
+	 * needed for page->page->getCropBox() and
+	 * page->page->getRotate()
+	 *
+	 * as a placeholder we just use the annot rect
+	 */
+	annot.am.area = pRect
+
+	return annot, nil
+}
+
+func (d *Document) Save(filename string) (saved bool, err error) {
+	filename, err = filepath.Abs(filename)
+	if err != nil {
+		return false, err
+	}
+
+	var e *C.GError
+	cFilename := (*C.gchar)(C.CString(filename))
+	defer C.free(unsafe.Pointer(cFilename))
+
+	cUri := C.g_filename_to_uri(cFilename, nil, nil)
+	cBool := C.poppler_document_save (d.doc, cUri, &e);
+	if e != nil {
+		err = errors.New(C.GoString((*C.char)(e.message)))
+		return false, err
+	}
+
+	if cBool == C.TRUE {
+		return true, nil
+	}
+
+	return false, nil
+}
+
+/*
+func (d *Document) GetAttachments() []Attachment {
+	return
+}
+*/
diff --git a/go-poppler/image.go b/go-poppler/image.go
new file mode 100644
index 0000000..ba2abc8
--- /dev/null
+++ b/go-poppler/image.go
@@ -0,0 +1,31 @@
+package poppler
+
+// #cgo pkg-config: poppler-glib
+// #include <poppler.h>
+// #include <glib.h>
+import "C"
+import (
+	"unsafe"
+
+	"github.com/ungerik/go-cairo"
+)
+
+// Image
+
+type Image struct {
+	Id   int
+	Area Rectangle
+	p    *C.struct__PopplerPage
+}
+
+type Rectangle struct {
+	X1, Y1, X2, Y2 float64
+}
+
+func (im *Image) GetSurface() (cs *cairo.Surface) {
+	ci := C.poppler_page_get_image(im.p, C.gint(im.Id))
+	ctx := C.cairo_create(ci)
+	cip := (cairo.Cairo_surface)(unsafe.Pointer(ci))
+	ctxp := (cairo.Cairo_context)(unsafe.Pointer(ctx))
+	return cairo.NewSurfaceFromC(cip, ctxp)
+}
diff --git a/go-poppler/page.go b/go-poppler/page.go
new file mode 100644
index 0000000..efd0706
--- /dev/null
+++ b/go-poppler/page.go
@@ -0,0 +1,217 @@
+package poppler
+
+// #cgo pkg-config: poppler-glib
+// #include <poppler.h>
+// #include <glib.h>
+// #include <cairo.h>
+import "C"
+import "unsafe"
+import "github.com/ungerik/go-cairo"
+
+//import "fmt"
+
+type Page struct {
+	p *C.struct__PopplerPage
+	openedAnnots []*Annot
+}
+
+func (p *Page) Text() string {
+	return C.GoString(C.poppler_page_get_text(p.p))
+}
+
+func (p *Page) TextAttributes() (results []TextAttributes) {
+	a := C.poppler_page_get_text_attributes(p.p)
+	defer C.poppler_page_free_text_attributes(a)
+	var attr *C.PopplerTextAttributes
+	results = make([]TextAttributes, 0)
+	el := C.g_list_first(a)
+	for el != nil {
+		attr = (*C.PopplerTextAttributes)(el.data)
+		fn := attr.font_name
+		result := TextAttributes{
+			FontName:     toString(fn),
+			FontSize:     float64(attr.font_size),
+			IsUnderlined: toBool(attr.is_underlined),
+			StartIndex:   int(attr.start_index),
+			EndIndex:     int(attr.end_index),
+			Color: Color{
+				R: int(attr.color.red),
+				G: int(attr.color.green),
+				B: int(attr.color.blue),
+			},
+		}
+		results = append(results, result)
+		el = el.next
+	}
+	return
+}
+
+func (p *Page) Size() (width, height float64) {
+	var w, h C.double
+	C.poppler_page_get_size(p.p, &w, &h)
+	return float64(w), float64(h)
+}
+
+func (p *Page) Index() int {
+	return int(C.poppler_page_get_index(p.p))
+}
+
+func (p *Page) Label() string {
+	return toString(C.poppler_page_get_label(p.p))
+}
+
+func (p *Page) Duration() float64 {
+	return float64(C.poppler_page_get_duration(p.p))
+}
+
+func (p *Page) Images() (results []Image) {
+	l := C.poppler_page_get_image_mapping(p.p)
+	defer C.poppler_page_free_image_mapping(l)
+	results = make([]Image, 0)
+	var im *C.PopplerImageMapping
+	for el := C.g_list_first(l); el != nil; el = el.next {
+		im = (*C.PopplerImageMapping)(el.data)
+		result := Image{
+			Id: int(im.image_id),
+			Area: Rectangle{
+				X1: float64(im.area.x1),
+				Y1: float64(im.area.y1),
+				X2: float64(im.area.x2),
+				Y2: float64(im.area.y2),
+			},
+			p: p.p,
+		}
+		results = append(results, result)
+	}
+	return
+}
+
+func (p *Page) TextLayout() (layouts []Rectangle) {
+	var rect *C.PopplerRectangle
+	var n C.guint
+	if toBool(C.poppler_page_get_text_layout(p.p, &rect, &n)) {
+		defer C.g_free((C.gpointer)(rect))
+		layouts = make([]Rectangle, int(n))
+		r := (*[1 << 30]C.PopplerRectangle)(unsafe.Pointer(rect))[:n:n]
+		for i := 0; i < int(n); i++ {
+			layouts[i] = Rectangle{
+				X1: float64(r[i].x1),
+				Y1: float64(r[i].y1),
+				X2: float64(r[i].x2),
+				Y2: float64(r[i].y2),
+			}
+		}
+	}
+	return
+}
+
+func (p *Page) TextLayoutAndAttrs() (result []TextEl) {
+	text := p.Text()
+	attrs := p.TextAttributes()
+	layout := p.TextLayout()
+	result = make([]TextEl, len(layout))
+	attrsRef := make([]*TextAttributes, len(attrs))
+	for i, a := range attrs {
+		attr := a
+		attrsRef[i] = &attr
+	}
+	i := 0
+	for _, t := range text {
+		var a *TextAttributes
+		for _, a = range attrsRef {
+			if i >= a.StartIndex && i <= a.EndIndex {
+				break
+			}
+		}
+		result[i] = TextEl{
+			Text:  string(t),
+			Attrs: a,
+			Rect:  layout[i],
+		}
+		i++
+	}
+	return
+}
+
+func (p *Page) Close() {
+	p.closeAnnotMappings()
+
+	if p.p != nil {
+		C.g_object_unref(C.gpointer(p.p))
+		/* avoid double free */
+		p.p = nil
+	}
+}
+
+// Converts a page into SVG and saves to file.
+// Inspired by https://github.com/dawbarton/pdf2svg
+func (p *Page) ConvertToSVG(filename string){
+	width, height := p.Size()
+
+	// Open the SVG file
+	surface := cairo.NewSVGSurface( filename, width, height, cairo.SVG_VERSION_1_2 )
+
+	// TODO Can be improved by using cairo_svg_surface_create_for_stream() instead of
+	//      cairo_svg_surface_create() for stream processing instead of file processing.
+	//      However, this needs to be changed in github.com/ungerik/go-cairo/surface.go
+
+	// Get cairo context pointer
+	_, drawcontext :=  surface.Native()
+
+	// Render the PDF file into the SVG file
+	C.poppler_page_render_for_printing(p.p, (*C.cairo_t)(unsafe.Pointer(drawcontext)) );
+
+	// Close the SVG file
+	surface.ShowPage()
+	surface.Destroy()
+}
+
+func (p *Page) closeAnnotMappings(){
+	for i := 0; i < len(p.openedAnnots); i++ {
+		p.openedAnnots[i].Close()
+	}
+
+	p.openedAnnots = nil
+
+}
+
+func (p *Page) GetAnnots() (Annots []*Annot) {
+	var annots []*Annot
+
+	annotGlist := C.poppler_page_get_annot_mapping(p.p)
+	defer C.g_list_free(annotGlist)
+
+	p.closeAnnotMappings()
+
+	for annotGlist != nil {
+		popplerAnnot := (*C.PopplerAnnotMapping)(annotGlist.data)
+
+
+		annot := &Annot{
+			am: popplerAnnot,
+		}
+
+		/* Maybe we can used openedAnnots instead of annots + openedAnnots
+		 */
+
+		annots = append(annots, annot)
+		p.openedAnnots = append(p.openedAnnots, annot)
+
+
+		annotGlist = annotGlist.next
+	}
+
+	return annots
+}
+
+func (p *Page) AnnotText(a Annot) string {
+	cText := C.poppler_page_get_text_for_area(p.p, &a.am.area)
+	return C.GoString(cText)
+}
+
+func (p *Page) AddAnnot(a Annot) {
+	C.poppler_page_add_annot(p.p, a.am.annot)
+}
+func (p *Page) RemoveAnnot(a Annot) {
+	C.poppler_page_remove_annot(p.p, a.am.annot)
+}
diff --git a/go-poppler/poppler.go b/go-poppler/poppler.go
new file mode 100644
index 0000000..eaa53c4
--- /dev/null
+++ b/go-poppler/poppler.go
@@ -0,0 +1,58 @@
+package poppler
+
+// #cgo pkg-config: poppler-glib
+// #include <poppler.h>
+// #include <stdlib.h>
+// #include <glib.h>
+// #include <unistd.h>
+import "C"
+
+import (
+	"errors"
+	"path/filepath"
+	"unsafe"
+)
+
+type poppDoc *C.struct__PopplerDocument
+
+func Open(filename string) (doc *Document, err error) {
+	filename, err = filepath.Abs(filename)
+	if err != nil {
+		return
+	}
+	var e *C.GError
+	cfilename := (*C.gchar)(C.CString(filename))
+	defer C.free(unsafe.Pointer(cfilename))
+	fn := C.g_filename_to_uri(cfilename, nil, nil)
+	var d poppDoc
+	d = C.poppler_document_new_from_file((*C.char)(fn), nil, &e)
+	if e != nil {
+		err = errors.New(C.GoString((*C.char)(e.message)))
+	}
+	doc = &Document{
+		doc:                d,
+		openedPages: []*Page{},
+	}
+	return
+}
+
+func Load(data []byte) (doc *Document, err error) {
+	var e *C.GError
+	var d poppDoc
+
+	b := C.g_bytes_new((C.gconstpointer)(unsafe.Pointer(&data[0])), (C.ulong)(len(data)))
+	defer C.g_bytes_unref(b)
+
+	d = C.poppler_document_new_from_bytes(b, nil, &e)
+	if e != nil {
+		err = errors.New(C.GoString((*C.char)(e.message)))
+	}
+	doc = &Document{
+		doc: d,
+	}
+	return
+}
+
+func Version() string {
+	return C.GoString(C.poppler_get_version())
+}
diff --git a/go-poppler/tags.go b/go-poppler/tags.go
new file mode 100644
index 0000000..fd24f70
--- /dev/null
+++ b/go-poppler/tags.go
@@ -0,0 +1,57 @@
+package poppler
+
+// #cgo pkg-config: poppler-glib
+// #include <poppler.h>
+// #include <stdlib.h>
+// #include <glib.h>
+// #include <unistd.h>
+import "C"
+import "strings"
+
+
+
+var zeroRect = Rectangle{X1: 0, X2: 0, Y1: 0, Y2: 0}
+
+func (d *Document) Tag(text string){
+	am := C.poppler_annot_mapping_new();
+
+	pRect := rectangleToPopplerRectangle(zeroRect)
+
+	annot := Annot {
+		am: am,
+	}
+	defer annot.Close()
+
+	am.annot = C.poppler_annot_text_new(d.doc, &pRect)
+	annot.SetContents(text)
+	annot.SetFlags(AnnotFlagHidden | AnnotFlagInvisible)
+
+	zeroPage := d.GetPage(0)
+	zeroPage.AddAnnot(annot)
+	defer zeroPage.Close()
+}
+
+
+func (d *Document) GetTags(filter string) []*Annot {
+	page := d.GetPage(0)
+	//defer page.Close()
+
+	annots := page.GetAnnots()
+	var tags []*Annot
+	for _, a := range(annots) {
+		if a.Type() == AnnotText &&
+		  rectEq(a.Rect(), zeroRect) &&
+		  a.Flags() & AnnotFlagHidden != 0 &&
+		  a.Flags() & AnnotFlagInvisible != 0 &&
+		  strings.HasPrefix(a.Contents(), filter){
+			tags = append(tags, a)
+		}
+	}
+
+	return tags
+}
+
+func (d *Document) RemoveTags(filter string){
+//	d.GetPage(0).AddAnnot(annot)
+	// TODO 
+}
diff --git a/go-poppler/text.go b/go-poppler/text.go
new file mode 100644
index 0000000..5550b64
--- /dev/null
+++ b/go-poppler/text.go
@@ -0,0 +1,22 @@
+package poppler
+
+import ()
+
+type TextEl struct {
+	Text  string
+	Attrs *TextAttributes
+	Rect  Rectangle
+}
+
+type TextAttributes struct {
+	FontName             string
+	FontSize             float64
+	IsUnderlined         bool
+	Color                Color
+	StartIndex, EndIndex int
+}
+
+type Color struct {
+	R, G, B int
+}
+
diff --git a/go-poppler/utils.go b/go-poppler/utils.go
new file mode 100644
index 0000000..4bda53a
--- /dev/null
+++ b/go-poppler/utils.go
@@ -0,0 +1,85 @@
+package poppler
+
+// #cgo pkg-config: poppler-glib
+// #include <poppler.h>
+// #include <glib.h>
+// #include <unistd.h>
+// #include <stdlib.h>
+import "C"
+
+import "unsafe"
+
+func toString(in *C.gchar) string {
+	return C.GoString((*C.char)(in))
+}
+
+func toBool(in C.gboolean) bool {
+	return  int(in) > 0
+}
+
+/* convert a Quad struct to a GArray */
+func quadsToGArray(quads []Quad) *C.GArray {
+	garray := C.g_array_new(C.FALSE, C.FALSE, C.sizeof_PopplerQuadrilateral)
+
+	for _, quad := range quads {
+		item := C.PopplerQuadrilateral{
+			p1: C.PopplerPoint{
+				x: C.double(quad.P1.X),
+				y: C.double(quad.P1.Y),
+			},
+			p2: C.PopplerPoint{
+				x: C.double(quad.P2.X),
+				y: C.double(quad.P2.Y),
+			},
+			p3: C.PopplerPoint{
+				x: C.double(quad.P3.X),
+				y: C.double(quad.P3.Y),
+			},
+			p4: C.PopplerPoint{
+				x: C.double(quad.P4.X),
+				y: C.double(quad.P4.Y),
+			},
+		}
+
+		C.g_array_append_vals(garray, C.gconstpointer(&item),1)
+	}
+
+	return garray
+}
+
+/* convert a GArray to a quad */
+func gArrayToQuads(q *C.GArray) []Quad {
+	length := int(q.len)
+
+	quads := make([]Quad, length)
+
+	for i := 0; i < length; i++ {
+		item := (*C.PopplerQuadrilateral)(unsafe.Pointer(uintptr(unsafe.Pointer(q.data)) + uintptr(i)*unsafe.Sizeof(C.PopplerQuadrilateral{})))
+		quads[i] = Quad{
+			P1: Point{X: float64(item.p1.x), Y: float64(item.p1.y)},
+			P2: Point{X: float64(item.p2.x), Y: float64(item.p2.y)},
+			P3: Point{X: float64(item.p3.x), Y: float64(item.p3.y)},
+			P4: Point{X: float64(item.p4.x), Y: float64(item.p4.y)},
+		}
+	}
+
+	return quads
+}
+
+func rectangleToPopplerRectangle (r Rectangle) C.PopplerRectangle {
+	var pRect C.PopplerRectangle
+
+	pRect.x1 = C.double(r.X1)
+	pRect.y1 = C.double(r.Y1)
+	pRect.x2 = C.double(r.X2)
+	pRect.y2 = C.double(r.Y2)
+
+	return pRect
+}
+
+func rectEq(r1 Rectangle, r2 Rectangle) bool {
+	return r1.X1 == r2.X1 &&
+		r1.X2 == r2.X2 &&
+		r1.Y1 == r2.Y1 &&
+		r1.Y2 == r2.Y2
+}