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Add text color and optimize text groups into whole blocks.

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Add UNICODE_VALUE define to allow toggling between Unicode and ISO-8859-1 modes.
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Michael R Sweet 2024-12-10 18:41:23 -05:00
parent 5a4afad566
commit 4b29c9a1c2
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GPG Key ID: BE67C75EC81F3244
1 changed files with 110 additions and 36 deletions
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146
examples/md2pdf.c
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@ -29,6 +29,15 @@
// Types... // Types...
// //
typedef enum doccolor_e // Document color enumeration
{
DOCCOLOR_BLACK, // #000
DOCCOLOR_RED, // #900
DOCCOLOR_GREEN, // #090
DOCCOLOR_BLUE, // #00C
DOCCOLOR_GRAY // #555
} doccolor_t;
typedef enum docfont_e // Document font enumeration typedef enum docfont_e // Document font enumeration
{ {
DOCFONT_REGULAR, // Roboto-Regular DOCFONT_REGULAR, // Roboto-Regular
@ -59,6 +68,7 @@ typedef struct docdata_s // Document formatting data
char *heading; // Current document heading char *heading; // Current document heading
pdfio_stream_t *st; // Current page stream pdfio_stream_t *st; // Current page stream
double y; // Current position on page double y; // Current position on page
doccolor_t color; // Current color
} docdata_t; } docdata_t;
@ -90,17 +100,18 @@ static const char * const docfont_names[] =
"FM" "FM"
}; };
#define LINE_HEIGHT 1.2 // Multiplier for line height #define LINE_HEIGHT 1.4 // Multiplier for line height
#define SIZE_BODY 11.0 // Size of body text (points) #define SIZE_BODY 11.0 // Size of body text (points)
#define SIZE_HEADFOOT 9.0 // Size of header/footer text #define SIZE_CODEBLOCK 10.0 // Size of code block text (points)
#define SIZE_HEADING_1 18.0 // Size of first level heading #define SIZE_HEADFOOT 9.0 // Size of header/footer text (points)
#define SIZE_HEADING_2 16.0 // Size of top level heading #define SIZE_HEADING_1 18.0 // Size of first level heading (points)
#define SIZE_HEADING_3 15.0 // Size of top level heading #define SIZE_HEADING_2 16.0 // Size of top level heading (points)
#define SIZE_HEADING_4 14.0 // Size of top level heading #define SIZE_HEADING_3 15.0 // Size of top level heading (points)
#define SIZE_HEADING_5 13.0 // Size of top level heading #define SIZE_HEADING_4 14.0 // Size of top level heading (points)
#define SIZE_HEADING_6 12.0 // Size of top level heading #define SIZE_HEADING_5 13.0 // Size of top level heading (points)
#define SIZE_TABLE 10.0 // Size of table text #define SIZE_HEADING_6 12.0 // Size of top level heading (points)
#define SIZE_TABLE 10.0 // Size of table text (points)
#define PAGE_WIDTH mm2pt(210) // Page width in points #define PAGE_WIDTH mm2pt(210) // Page width in points
#define PAGE_LENGTH in2pt(11) // Page length in points #define PAGE_LENGTH in2pt(11) // Page length in points
@ -114,6 +125,44 @@ static const char * const docfont_names[] =
// Vertical position of header // Vertical position of header
#define PAGE_FOOTER in2pt(0.5) // Vertical position of footer #define PAGE_FOOTER in2pt(0.5) // Vertical position of footer
#define UNICODE_VALUE true // `true` for Unicode text, `false` for ISO-8859-1
//
// 'set_color()' - Set the stroke and fill color.
//
static void
set_color(docdata_t *dd, // I - Document data
doccolor_t color) // I - Document color
{
switch (color)
{
case DOCCOLOR_BLACK :
pdfioContentSetFillColorDeviceGray(dd->st, 0.0);
pdfioContentSetStrokeColorDeviceGray(dd->st, 0.0);
break;
case DOCCOLOR_RED :
pdfioContentSetFillColorDeviceRGB(dd->st, 0.6, 0.0, 0.0);
pdfioContentSetStrokeColorDeviceRGB(dd->st, 0.6, 0.0, 0.0);
break;
case DOCCOLOR_GREEN :
pdfioContentSetFillColorDeviceRGB(dd->st, 0.0, 0.6, 0.0);
pdfioContentSetStrokeColorDeviceRGB(dd->st, 0.0, 0.6, 0.0);
break;
case DOCCOLOR_BLUE :
pdfioContentSetFillColorDeviceRGB(dd->st, 0.0, 0.0, 0.8);
pdfioContentSetStrokeColorDeviceRGB(dd->st, 0.0, 0.0, 0.8);
break;
case DOCCOLOR_GRAY :
pdfioContentSetFillColorDeviceGray(dd->st, 0.333);
pdfioContentSetStrokeColorDeviceGray(dd->st, 0.333);
break;
}
dd->color = color;
}
// //
// 'new_page()' - Start a new page. // 'new_page()' - Start a new page.
@ -151,8 +200,7 @@ new_page(docdata_t *dd) // I - Document data
dd->st = pdfioFileCreatePage(dd->pdf, page_dict); dd->st = pdfioFileCreatePage(dd->pdf, page_dict);
// Add header/footer text // Add header/footer text
pdfioContentSetFillColorGray(dd->st, 0.333); set_color(dd, DOCCOLOR_GRAY);
pdfioContentSetStrokeColorGray(dd->st, 0.333);
pdfioContentSetTextFont(dd->st, docfont_names[DOCFONT_REGULAR], SIZE_HEADFOOT); pdfioContentSetTextFont(dd->st, docfont_names[DOCFONT_REGULAR], SIZE_HEADFOOT);
if (pdfioFileGetNumPages(dd->pdf) > 1 && dd->title) if (pdfioFileGetNumPages(dd->pdf) > 1 && dd->title)
@ -162,7 +210,7 @@ new_page(docdata_t *dd) // I - Document data
pdfioContentTextBegin(dd->st); pdfioContentTextBegin(dd->st);
pdfioContentTextMoveTo(dd->st, dd->crop_box.x1 + 0.5 * (dd->crop_box.x2 - dd->crop_box.x1 - width), dd->crop_box.y2 - SIZE_HEADFOOT); pdfioContentTextMoveTo(dd->st, dd->crop_box.x1 + 0.5 * (dd->crop_box.x2 - dd->crop_box.x1 - width), dd->crop_box.y2 - SIZE_HEADFOOT);
pdfioContentTextShow(dd->st, /*unicode*/true, dd->title); pdfioContentTextShow(dd->st, UNICODE_VALUE, dd->title);
pdfioContentTextEnd(dd->st); pdfioContentTextEnd(dd->st);
pdfioContentPathMoveTo(dd->st, dd->crop_box.x1, dd->crop_box.y2 - 2 * SIZE_HEADFOOT * LINE_HEIGHT + SIZE_HEADFOOT); pdfioContentPathMoveTo(dd->st, dd->crop_box.x1, dd->crop_box.y2 - 2 * SIZE_HEADFOOT * LINE_HEIGHT + SIZE_HEADFOOT);
@ -189,12 +237,13 @@ new_page(docdata_t *dd) // I - Document data
pdfioContentTextMoveTo(dd->st, dd->crop_box.x1, dd->crop_box.y1); pdfioContentTextMoveTo(dd->st, dd->crop_box.x1, dd->crop_box.y1);
} }
pdfioContentTextShow(dd->st, /*unicode*/true, temp); pdfioContentTextShow(dd->st, UNICODE_VALUE, temp);
pdfioContentTextEnd(dd->st); pdfioContentTextEnd(dd->st);
if (dd->heading) if (dd->heading)
{ {
pdfioContentTextBegin(dd->st); pdfioContentTextBegin(dd->st);
if (pdfioFileGetNumPages(dd->pdf) & 1) if (pdfioFileGetNumPages(dd->pdf) & 1)
{ {
// Current heading on left... // Current heading on left...
@ -206,13 +255,12 @@ new_page(docdata_t *dd) // I - Document data
pdfioContentTextMoveTo(dd->st, dd->crop_box.x2 - width, dd->crop_box.y1); pdfioContentTextMoveTo(dd->st, dd->crop_box.x2 - width, dd->crop_box.y1);
} }
pdfioContentTextShow(dd->st, /*unicode*/true, dd->heading); pdfioContentTextShow(dd->st, UNICODE_VALUE, dd->heading);
pdfioContentTextEnd(dd->st); pdfioContentTextEnd(dd->st);
} }
// The rest of the text will be full black... // The rest of the text will be full black...
pdfioContentSetFillColorGray(dd->st, 0.0); set_color(dd, DOCCOLOR_BLACK);
pdfioContentSetStrokeColorGray(dd->st, 0.0);
dd->y = dd->art_box.y2; dd->y = dd->art_box.y2;
} }
@ -242,7 +290,9 @@ format_block(docdata_t *dd, // I - Document data
prevface; // Previous font face prevface; // Previous font face
double x, y; // Current position double x, y; // Current position
double width, // Width of current fragment double width, // Width of current fragment
lwidth, // Leader width
wswidth; // Width of whitespace wswidth; // Width of whitespace
doccolor_t color; // Color of text
blocktype = mmdGetType(block); blocktype = mmdGetType(block);
@ -261,16 +311,17 @@ format_block(docdata_t *dd, // I - Document data
// Add leader text on first line... // Add leader text on first line...
pdfioContentSetTextFont(dd->st, docfont_names[prevface = fontface], fontsize); pdfioContentSetTextFont(dd->st, docfont_names[prevface = fontface], fontsize);
width = pdfioContentTextMeasure(dd->fonts[fontface], leader, fontsize); lwidth = pdfioContentTextMeasure(dd->fonts[fontface], leader, fontsize);
pdfioContentTextBegin(dd->st); pdfioContentTextBegin(dd->st);
pdfioContentTextMoveTo(dd->st, left - width, y); pdfioContentTextMoveTo(dd->st, left - lwidth, y);
pdfioContentTextShow(dd->st, /*unicode*/true, leader); pdfioContentTextShow(dd->st, UNICODE_VALUE, leader);
} }
else else
{ {
// No leader text... // No leader text...
prevface = DOCFONT_MAX; prevface = DOCFONT_MAX;
lwidth = 0.0;
} }
for (current = mmdGetFirstChild(block), x = left; current; current = next) for (current = mmdGetFirstChild(block), x = left; current; current = next)
@ -314,6 +365,13 @@ format_block(docdata_t *dd, // I - Document data
else else
curface = fontface; curface = fontface;
if (curtype == MMD_TYPE_CODE_TEXT)
color = DOCCOLOR_RED;
else if (curtype == MMD_TYPE_LINKED_TEXT)
color = DOCCOLOR_BLUE;
else
color = DOCCOLOR_BLACK;
width = pdfioContentTextMeasure(dd->fonts[curface], curtext, fontsize); width = pdfioContentTextMeasure(dd->fonts[curface], curtext, fontsize);
if (curws) if (curws)
wswidth = pdfioContentTextMeasure(dd->fonts[curface], " ", fontsize); wswidth = pdfioContentTextMeasure(dd->fonts[curface], " ", fontsize);
@ -326,38 +384,48 @@ format_block(docdata_t *dd, // I - Document data
x = left; x = left;
y -= fontsize * LINE_HEIGHT; y -= fontsize * LINE_HEIGHT;
if (prevface != DOCFONT_MAX)
pdfioContentTextEnd(dd->st);
prevface = DOCFONT_MAX;
if (y < dd->art_box.y1) if (y < dd->art_box.y1)
{ {
// New page... // New page...
if (prevface != DOCFONT_MAX)
{
pdfioContentTextEnd(dd->st);
prevface = DOCFONT_MAX;
}
new_page(dd); new_page(dd);
y = dd->y - fontsize * LINE_HEIGHT; y = dd->y - fontsize * LINE_HEIGHT;
} }
else
{
pdfioContentTextMoveTo(dd->st, lwidth, -fontsize * LINE_HEIGHT);
lwidth = 0.0;
}
} }
if (curface != prevface) if (curface != prevface)
{ {
if (prevface != DOCFONT_MAX) if (prevface == DOCFONT_MAX)
pdfioContentTextEnd(dd->st); {
pdfioContentTextBegin(dd->st);
pdfioContentTextMoveTo(dd->st, x, y);
}
pdfioContentSetTextFont(dd->st, docfont_names[prevface = curface], fontsize); pdfioContentSetTextFont(dd->st, docfont_names[prevface = curface], fontsize);
pdfioContentTextBegin(dd->st);
pdfioContentTextMoveTo(dd->st, x, y);
} }
if (color != dd->color)
set_color(dd, color);
if (x > left && curws) if (x > left && curws)
{ {
pdfioContentTextShowf(dd->st, /*unicode*/true, " %s", curtext); pdfioContentTextShowf(dd->st, UNICODE_VALUE, " %s", curtext);
x += width + wswidth; x += width + wswidth;
} }
else else
{ {
pdfioContentTextShow(dd->st, /*unicode*/true, curtext); pdfioContentTextShow(dd->st, UNICODE_VALUE, curtext);
x += width; x += width;
} }
@ -367,18 +435,24 @@ format_block(docdata_t *dd, // I - Document data
x = left; x = left;
y -= fontsize * LINE_HEIGHT; y -= fontsize * LINE_HEIGHT;
if (prevface != DOCFONT_MAX)
pdfioContentTextEnd(dd->st);
prevface = DOCFONT_MAX;
if (y < dd->art_box.y1) if (y < dd->art_box.y1)
{ {
// New page... // New page...
if (prevface != DOCFONT_MAX)
{
pdfioContentTextEnd(dd->st);
prevface = DOCFONT_MAX;
}
new_page(dd); new_page(dd);
y = dd->y - fontsize * LINE_HEIGHT; y = dd->y - fontsize * LINE_HEIGHT;
} }
else
{
pdfioContentTextMoveTo(dd->st, lwidth, -fontsize * LINE_HEIGHT);
lwidth = 0.0;
}
} }
} }
@ -539,7 +613,7 @@ main(int argc, // I - Number of command-line arguments
// Add fonts... // Add fonts...
for (fontface = DOCFONT_REGULAR; fontface < DOCFONT_MAX; fontface ++) for (fontface = DOCFONT_REGULAR; fontface < DOCFONT_MAX; fontface ++)
{ {
if ((dd.fonts[fontface] = pdfioFileCreateFontObjFromFile(dd.pdf, docfont_filenames[fontface], /*unicode*/true)) == NULL) if ((dd.fonts[fontface] = pdfioFileCreateFontObjFromFile(dd.pdf, docfont_filenames[fontface], UNICODE_VALUE)) == NULL)
return (1); return (1);
} }