//////////////////////////////////////////////////////////////////////////////////////////////////
// GetPageObjectTextState
// get text object's of specified mcid the text state
//////////////////////////////////////////////////////////////////////////////////////////////////
static PdfTextState GetPageObjectTextState(PdsPageObject page_object, int mcid)
{
if (page_object.GetObjectType() == PdfPageObjectType.kPdsPageText)
{
PdsText text = (PdsText)page_object;
// check if this text page object has the same mcid
PdsContentMark content_mark = page_object.GetContentMark();
if (content_mark != null && content_mark.GetTagMcid() == mcid)
{
PdfTextState ts = text.GetTextState();
if (ts.font != null)
{
return(ts);
}
}
}
else if (page_object.GetObjectType() == PdfPageObjectType.kPdsPageForm)
{
// search for the text object inside of the form XObject
PdsForm form = (PdsForm)page_object;
var content = form.GetContent();
for (int i = 0; i < content.GetNumObjects(); i++)
{
var ts = GetPageObjectTextState(content.GetObject(i), mcid);
if (ts.font != null)
{
return(ts);
}
}
}
return(new PdfTextState());
}
//////////////////////////////////////////////////////////////////////////////////////////////////
// TagParagraphAsHeading
// re-tag the struct element to heading based on font properties
//////////////////////////////////////////////////////////////////////////////////////////////////
static void TagParagraphAsHeading(PdsStructElement struct_elem)
{
string type = struct_elem.GetType_(true);
if (type == "P")
{
// get the paragraph text_state
PdfTextState ts = GetParagraphTextState(struct_elem);
// get the font name
string font_name = ts.font != null?ts.font.GetFontName() : "";
string tag_type = "";
if (font_name.Contains("Black") && ts.font_size >= 25)
{
tag_type = "H1";
}
else if (font_name.Contains("Bold") && ts.font_size >= 16)
{
tag_type = "H2";
}
// update tag type
if (tag_type.Length != 0)
{
struct_elem.SetType(tag_type);
}
return; // this was a P tag, no need to continue to kid struct elements
}
// search kid struct elements
for (int i = 0; i < struct_elem.GetNumKids(); i++)
{
if (struct_elem.GetKidType(i) == PdfStructElementType.kPdsStructKidElement)
{
PdsObject kid_obj = struct_elem.GetKidObject(i);
PdsStructElement kid_elem = struct_elem.GetStructTree().AcquireStructElement(kid_obj);
TagParagraphAsHeading(kid_elem);
kid_elem.Release();
}
}
}
//////////////////////////////////////////////////////////////////////////////////////////////////
// TagParagraphAsHeading
// re-tag the struct element to heading based on font properties
//////////////////////////////////////////////////////////////////////////////////////////////////
static void TagParagraphAsHeading(PdsStructElement struct_elem)
{
string type = struct_elem.GetType_(true);
// if (type == "P") {
// get the paragraph text_state
PdfTextState ts = GetParagraphTextState(struct_elem);
// get the font name
//string font_name = ts.font != null ? ts.font.GetFontName() : "";
string tag_type = "";
//if (font_name.Contains("Black") && ts.font_size >= 25)
// tag_type = "H1";
//else if (font_name.Contains("Bold") && ts.font_size >= 16)
// tag_type = "H2";
Console.WriteLine("Before replacing..");
if (ts.font_size >= 14)
{
tag_type = "H1";
Console.WriteLine("Replacing paragraph with Heading 1");
}
else if (ts.font_size >= 12)
{
tag_type = "H2";
Console.WriteLine("Replacing paragraph with Heading 2");
}
else if (ts.font_size >= 6)
{
tag_type = "H3";
Console.WriteLine("Replacing paragraph with Heading 2");
}
// update tag type
if (tag_type.Length != 0)
{
struct_elem.SetType(tag_type);
}
// return; // this was a P tag, no need to continue to kid struct elements
//}
// search kid struct elements
for (int i = 0; i < struct_elem.GetNumKids(); i++)
{
string actualText = struct_elem.GetActualText();
if (struct_elem.GetKidType(i) == PdfStructElementType.kPdsStructKidElement)
{
PdsObject kid_obj = struct_elem.GetKidObject(i);
PdsStructElement kid_elem = struct_elem.GetStructTree().AcquireStructElement(kid_obj);
TagParagraphAsHeading(kid_elem);
kid_elem.Release();
}
else if (struct_elem.GetKidType(i) == PdfStructElementType.kPdsStructKidPageContent)
{
PdfTextState textState = GetParagraphTextState(struct_elem);
//PdsObject kid_obj =
//PdsStructElement kid_elem = struct_elem.GetStructTree().AcquireStructElement(kid_obj);
//var element_text = kid_elem.GetActualText();
}
}
}
public static void Run(
String openPath, // source PDF document
String savePath, // output PDF document
String imgPath // watermark to apply
)
{
Pdfix pdfix = PdfixEngine.Instance;
PdfDoc doc = pdfix.OpenDoc(openPath, "");
if (doc == null)
{
throw new Exception(pdfix.GetError());
}
// identify image format from file path
PdfImageFormat format = PdfImageFormat.kImageFormatJpg;
if (Path.GetExtension(imgPath).ToLower() == ".png")
{
format = PdfImageFormat.kImageFormatPng;
}
// load image file data into memory stream
byte[] bytes = File.ReadAllBytes(imgPath);
var memStm = pdfix.CreateMemStream();
if (memStm == null)
{
throw new Exception(pdfix.GetError());
}
memStm.Write(0, bytes);
// create XObject from the image
var image_obj = doc.CreateXObjectFromImage(memStm, format);
if (image_obj == null)
{
throw new Exception(pdfix.GetError());
}
// add annotation on the first page
var page = doc.AcquirePage(0);
if (page == null)
{
throw new Exception(pdfix.GetError());
}
var page_view = page.AcquirePageView(1, PdfRotate.kRotate0);
if (page_view == null)
{
throw new Exception(pdfix.GetError());
}
// rect for the new annotation
PdfRect annot_rect = new PdfRect()
{
left = 100,
right = 300,
bottom = 100,
top = 200
};
PdfAnnot annot = page.CreateAnnot(PdfAnnotSubtype.kAnnotStamp, annot_rect);
page.AddAnnot(0, annot);
// create content
var content = doc.CreateContent();
// add image to content
var xobjdict = image_obj.GetStreamDict();
var width = xobjdict.GetNumber("Width");
var height = xobjdict.GetNumber("Height");
var ratio = height / width;
var res_width = annot_rect.right - annot_rect.left;
var res_height = res_width * ratio;
var center_adj = ((annot_rect.top - annot_rect.bottom) - res_height) / 2;
var imageobject = content.AddNewImage(-1, image_obj, new PdfMatrix(res_width, 0, 0, res_height, 0, center_adj));
PdfGraphicState imageGs = new PdfGraphicState();
imageGs.color_state.fill_opacity = 255;
imageobject.SetGState(imageGs);
// create text state
PdfTextState textState = new PdfTextState();
var colorSpace = doc.CreateColorSpace(PdfColorSpaceFamily.kColorSpaceDeviceRGB);
var fontName = "Segoe UI";
var fn = fontName.Trim();
var sysFont = pdfix.FindSysFont(fn, 0, PdfFontCodepage.kFontDefANSICodepage);
if (sysFont == null)
{
throw new Exception(pdfix.GetError());
}
textState.font = doc.CreateFont(sysFont, PdfFontCharset.kFontAnsiCharset, 0);
sysFont.Destroy();
if (textState.font == null)
{
throw new Exception(pdfix.GetError());
}
textState.font_size = 11;
textState.color_state.fill_type = PdfFillType.kFillTypeSolid;
var fill_color = colorSpace.CreateColor();
fill_color.SetValue(0, 0.5f);
fill_color.SetValue(1, 0.5f);
fill_color.SetValue(2, 0.5f);
textState.color_state.fill_color = fill_color;
textState.color_state.fill_opacity = 255;
textState.color_state.stroke_type = PdfFillType.kFillTypeSolid;
var stroke_color = colorSpace.CreateColor();
stroke_color.SetValue(0, 0);
stroke_color.SetValue(1, 0);
stroke_color.SetValue(2, 0);
textState.color_state.stroke_color = stroke_color;
textState.color_state.stroke_opacity = 255;
textState.char_spacing = 2;
// add text to content
var line = "test text in appearance";
var textObject = content.AddNewText(-1, textState.font, new PdfMatrix(1, 0, 0, 1, 10, 10));
if (textObject == null)
{
throw new Exception(pdfix.GetError());
}
textObject.SetTextState(textState);
textObject.SetText(line);
// set annotation appearance
PdsContentParams contentParams = new PdsContentParams();
contentParams.bbox = new PdfRect(annot_rect.right - annot_rect.left, 0, 0, annot_rect.top - annot_rect.bottom);
contentParams.matrix = new PdfMatrix(1, 0, 0, 1, 0, 0);
contentParams.form_type = 1;
contentParams.flags = 2;
var appearance_stream = content.ToObject(doc, contentParams);
annot.SetAppearanceFromXObject(appearance_stream, PdfAnnotAppearanceMode.kAppearanceNormal);
page.Release();
// save document
if (!doc.Save(savePath, Pdfix.kSaveFull))
{
throw new Exception(pdfix.GetError());
}
doc.Close();
}
