diff options
| -rw-r--r-- | fpdf.go | 41 | ||||
| -rw-r--r-- | fpdf_test.go | 20 | ||||
| -rw-r--r-- | htmlbasic.go | 18 |
3 files changed, 73 insertions, 6 deletions
@@ -2160,6 +2160,47 @@ func (f *Fpdf) WriteLinkID(h float64, displayStr string, linkID int) { f.write(h, displayStr, linkID, "") } +// WriteAligned is an implementation of Write that makes it possible to align +// text. +// +// width indicates the width of the box the text will be drawn in. This is in +// the unit of measure specified in New(). If it is set to 0, the bounding box +//of the page will be taken (pageWidth - leftMargin - rightMargin). +// +// lineHeight indicates the line height in the unit of measure specified in +// New(). +// +// alignStr sees to horizontal alignment of the given textStr. The options are +// "L", "C" and "R" (Left, Center, Right). The default is "L". +func (f *Fpdf) WriteAligned(width, lineHeight float64, textStr, alignStr string) { + lMargin, _, rMargin, _ := f.GetMargins() + + if width == 0 { + pageWidth, _ := f.GetPageSize() + width = pageWidth - (lMargin + rMargin) + } + + lines := f.SplitLines([]byte(textStr), width) + + for _, lineBt := range lines { + lineStr := string(lineBt[:]) + lineWidth := f.GetStringWidth(lineStr) + + switch alignStr { + case "C": + f.SetLeftMargin(lMargin + ((width - lineWidth) / 2)) + f.Write(lineHeight, lineStr) + f.SetLeftMargin(lMargin) + case "R": + f.SetLeftMargin(lMargin + (width - lineWidth) - rMargin) + f.Write(lineHeight, lineStr) + f.SetLeftMargin(lMargin) + default: + f.Write(lineHeight, lineStr) + } + } +} + // Ln performs a line break. The current abscissa goes back to the left margin // and the ordinate increases by the amount passed in parameter. A negative // value of h indicates the height of the last printed cell. diff --git a/fpdf_test.go b/fpdf_test.go index ff8c5da..966767f 100644 --- a/fpdf_test.go +++ b/fpdf_test.go @@ -463,6 +463,7 @@ func ExampleFpdf_HTMLBasicNew() { _, lineHt = pdf.GetFontSize() htmlStr := `You can now easily print text mixing different styles: <b>bold</b>, ` + `<i>italic</i>, <u>underlined</u>, or <b><i><u>all at once</u></i></b>!<br><br>` + + `<center>You can also center text.</center>` + `You can also insert links on text, such as ` + `<a href="http://www.fpdf.org">www.fpdf.org</a>, or on an image: click on the logo.` html := pdf.HTMLBasicNew() @@ -488,6 +489,25 @@ func ExampleFpdf_AddFont() { // Successfully generated pdf/Fpdf_AddFont.pdf } +// This example demonstrates how to align text with the Write function. +func ExampleFpdf_WriteAligned() { + pdf := gofpdf.New("P", "mm", "A4", example.FontDir()) + pdf.AddPage() + pdf.SetFont("Helvetica", "", 12) + pdf.WriteAligned(0, 35, "This text is the default alignment, Left", "") + pdf.Ln(35) + pdf.WriteAligned(0, 35, "This text is aligned Left", "L") + pdf.Ln(35) + pdf.WriteAligned(0, 35, "This text is aligned Center", "C") + pdf.Ln(35) + pdf.WriteAligned(0, 35, "This text is aligned Right", "R") + fileStr := example.Filename("Fpdf_WriteAligned") + err := pdf.OutputFileAndClose(fileStr) + example.Summary(err, fileStr) + // Output: + // Successfully generated pdf/Fpdf_WriteAligned.pdf +} + // This example demonstrates how images are included in documents. func ExampleFpdf_Image() { pdf := gofpdf.New("P", "mm", "A4", "") diff --git a/htmlbasic.go b/htmlbasic.go index e602b7d..6998128 100644 --- a/htmlbasic.go +++ b/htmlbasic.go @@ -116,10 +116,10 @@ func (f *Fpdf) HTMLBasicNew() (html HTMLBasicType) { // Write prints text from the current position using the currently selected // font. See HTMLBasicNew() to create a receiver that is associated with the // PDF document instance. The text can be encoded with a basic subset of HTML -// that includes hyperlinks and tags for italic (I), bold (B) and underscore -// (U) attributes. When the right margin is reached a line break occurs and -// text continues from the left margin. Upon method exit, the current position -// is left at the end of the text. +// that includes hyperlinks and tags for italic (I), bold (B), underscore +// (U) and center (CENTER) attributes. When the right margin is reached a line +// break occurs and text continues from the left margin. Upon method exit, the +// current position is left at the end of the text. // // lineHt indicates the line height in the unit of measure specified in New(). func (html *HTMLBasicType) Write(lineHt float64, htmlStr string) { @@ -161,6 +161,7 @@ func (html *HTMLBasicType) Write(lineHt float64, htmlStr string) { } list := HTMLBasicTokenize(htmlStr) var ok bool + alignStr := "L" for _, el := range list { switch el.Cat { case 'T': @@ -168,7 +169,7 @@ func (html *HTMLBasicType) Write(lineHt float64, htmlStr string) { putLink(hrefStr, el.Str) hrefStr = "" } else { - html.pdf.Write(lineHt, el.Str) + html.pdf.WriteAligned(0, lineHt, el.Str, alignStr) } case 'O': switch el.Str { @@ -180,6 +181,9 @@ func (html *HTMLBasicType) Write(lineHt float64, htmlStr string) { setStyle(0, 0, 1) case "br": html.pdf.Ln(lineHt) + case "center": + html.pdf.Ln(lineHt) + alignStr = "C" case "a": hrefStr, ok = el.Attr["href"] if !ok { @@ -194,7 +198,9 @@ func (html *HTMLBasicType) Write(lineHt float64, htmlStr string) { setStyle(0, -1, 0) case "u": setStyle(0, 0, -1) - + case "center": + html.pdf.Ln(lineHt) + alignStr = "L" } } } |