mirror of
https://github.com/michaelrsweet/pdfio.git
synced 2024-12-26 05:18:21 +01:00
Save work on image support.
This commit is contained in:
Michael R Sweet
parent
a39b01ec9c
commit
dc65eb8d2f
@ -20,6 +20,11 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef _WIN32
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# include <io.h>
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#else
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# include <unistd.h>
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#endif // _WIN32
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#include "mmd.h"
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#include <pdfio.h>
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#include <pdfio-content.h>
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@ -55,6 +60,14 @@ typedef struct docimage_s // Document image info
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#define DOCIMAGE_MAX 1000 // Maximum number of images
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typedef struct doclink_s // Document link info
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{
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const char *url; // Reference URL
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pdfio_rect_t box; // Link box
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} doclink_t;
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#define DOCLINK_MAX 1000 // Maximum number of links/page
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typedef struct docdata_s // Document formatting data
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{
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pdfio_file_t *pdf; // PDF file
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@ -69,6 +82,9 @@ typedef struct docdata_s // Document formatting data
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pdfio_stream_t *st; // Current page stream
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double y; // Current position on page
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doccolor_t color; // Current color
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pdfio_obj_t *annots; // Annotations object (for links)
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size_t num_links; // Number of links for this page
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doclink_t links[DOCLINK_MAX]; // Links for this page
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} docdata_t;
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@ -128,6 +144,90 @@ static const char * const docfont_names[] =
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#define UNICODE_VALUE true // `true` for Unicode text, `false` for ISO-8859-1
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//
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// 'mmd_walk_next()' - Find the next markdown node.
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//
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static mmd_t * // O - Next node or `NULL` at end
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mmd_walk_next(mmd_t *top, // I - Top node
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mmd_t *node) // I - Current node
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{
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mmd_t *next, // Next node
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*parent; // Parent node
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// Figure out the next node under "top"...
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if ((next = mmdGetFirstChild(node)) == NULL)
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{
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if ((next = mmdGetNextSibling(node)) == NULL)
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{
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if ((parent = mmdGetParent(node)) != top)
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{
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while ((next = mmdGetNextSibling(parent)) == NULL)
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{
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if ((parent = mmdGetParent(parent)) == top)
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break;
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}
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}
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}
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}
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return (next);
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}
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//
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// 'add_images()' - Scan the markdown document for images.
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//
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static void
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add_images(docdata_t *dd, // I - Document data
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mmd_t *doc) // I - Markdown document
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{
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mmd_t *current, // Current node
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*next; // Next node
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// Scan the entire document for images...
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for (current = mmdGetFirstChild(doc); current; current = next)
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{
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// Get next node
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next = mmd_walk_next(doc, current);
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// Look for image nodes...
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if (mmdGetType(current) == MMD_TYPE_IMAGE)
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{
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const char *url, // URL for image
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*ext; // Extension
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url = mmdGetURL(current);
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ext = strrchr(url, '.');
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fprintf(stderr, "IMAGE(%s), ext=\"%s\"\n", url, ext);
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if (!access(url, 0) && ext && (!strcmp(ext, ".png") || !strcmp(ext, ".jpg") || !strcmp(ext, ".jpeg")))
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{
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// Local JPEG or PNG file, so add it if we haven't already...
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size_t i; // Looping var
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for (i = 0; i < dd->num_images; i ++)
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{
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if (!strcmp(dd->images[i].url, url))
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break;
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}
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if (i >= dd->num_images && dd->num_images < DOCIMAGE_MAX)
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{
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dd->images[i].url = url;
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if ((dd->images[i].obj = pdfioFileCreateImageObjFromFile(dd->pdf, url, false)) != NULL)
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dd->num_images ++;
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}
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}
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}
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}
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}
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//
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// 'set_color()' - Set the stroke and fill color.
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//
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@ -286,10 +386,13 @@ format_block(docdata_t *dd, // I - Document data
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const char *curtext, // Current text
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*cururl; // Current URL, if any
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bool curws; // Current whitespace
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pdfio_obj_t *curimage; // Current image, if any
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char curimagename[32]; // Current image name
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docfont_t curface, // Current font face
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prevface; // Previous font face
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double x, y; // Current position
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double width, // Width of current fragment
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height, // Height of current fragment
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lwidth, // Leader width
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wswidth; // Width of whitespace
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doccolor_t color; // Color of text
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@ -327,34 +430,37 @@ format_block(docdata_t *dd, // I - Document data
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for (current = mmdGetFirstChild(block), x = left; current; current = next)
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{
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// Get information about the current node...
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curtype = mmdGetType(current);
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curtext = mmdGetText(current);
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cururl = mmdGetURL(current);
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curws = mmdGetWhitespace(current);
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// fprintf(stderr, "current=%p, curtype=%d, curtext=\"%s\", cururl=\"%s\", curws=%s\n", (void *)current, curtype, curtext, cururl, curws ? "true" : "false");
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// Figure out the next node under this block...
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if ((next = mmdGetFirstChild(current)) == NULL)
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{
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if ((next = mmdGetNextSibling(current)) == NULL)
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{
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mmd_t *parent; // Parent node
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if ((parent = mmdGetParent(current)) != block)
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{
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while ((next = mmdGetNextSibling(parent)) == NULL)
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{
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if ((parent = mmdGetParent(parent)) == block)
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break;
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}
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}
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}
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}
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curtype = mmdGetType(current);
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curtext = mmdGetText(current);
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curimage = NULL;
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curimagename[0] = '\0';
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cururl = mmdGetURL(current);
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curws = mmdGetWhitespace(current);
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next = mmd_walk_next(block, current);
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// Process the node...
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if (!curtext)
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if (curtype == MMD_TYPE_IMAGE && cururl)
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{
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// Embed an image
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size_t i; // Looping var
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for (i = 0; i < dd->num_images; i ++)
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{
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if (!strcmp(dd->images[i].url, cururl))
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{
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curimage = dd->images[i].obj;
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snprintf(curimagename, sizeof(curimagename), "I%u", (unsigned)i);
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break;
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}
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}
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if (!curimage)
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continue;
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}
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else if (!curtext)
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{
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continue;
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}
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if (curtype == MMD_TYPE_EMPHASIZED_TEXT)
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curface = DOCFONT_ITALIC;
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@ -372,7 +478,52 @@ format_block(docdata_t *dd, // I - Document data
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else
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color = DOCCOLOR_BLACK;
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width = pdfioContentTextMeasure(dd->fonts[curface], curtext, fontsize);
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if (curimage)
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{
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// Image - treat as 100dpi
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width = 72.0 * pdfioImageGetWidth(curimage) / 100.0;
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height = 72.0 * pdfioImageGetHeight(curimage) / 100.0;
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if (width > (right - left))
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{
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// Too wide, scale to width...
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width = right - left;
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height = width * pdfioImageGetHeight(curimage) / pdfioImageGetWidth(curimage);
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}
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else if (height > (dd->art_box.y2 - dd->art_box.y1))
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{
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// Too tall, scale to height...
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height = dd->art_box.y2 - dd->art_box.y1;
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width = height * pdfioImageGetWidth(curimage) / pdfioImageGetHeight(curimage);
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}
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if (x <= left)
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{
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y -= height - fontsize * LINE_HEIGHT;
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if (prevface != DOCFONT_MAX)
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{
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pdfioContentTextEnd(dd->st);
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prevface = DOCFONT_MAX;
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}
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if (y < dd->art_box.y1)
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{
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// New page...
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new_page(dd);
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x = left;
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y = dd->y - height;
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}
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}
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}
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else
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{
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// Text fragment...
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width = pdfioContentTextMeasure(dd->fonts[curface], curtext, fontsize);
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height = fontsize * LINE_HEIGHT;
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}
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if (curws)
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wswidth = pdfioContentTextMeasure(dd->fonts[curface], " ", fontsize);
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else
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@ -382,7 +533,7 @@ format_block(docdata_t *dd, // I - Document data
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{
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// New line...
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x = left;
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y -= fontsize * LINE_HEIGHT;
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y -= height;
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if (y < dd->art_box.y1)
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{
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@ -395,7 +546,7 @@ format_block(docdata_t *dd, // I - Document data
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new_page(dd);
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y = dd->y - fontsize * LINE_HEIGHT;
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y = dd->y - height;
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}
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else
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{
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@ -404,29 +555,46 @@ format_block(docdata_t *dd, // I - Document data
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}
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}
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if (curface != prevface)
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fprintf(stderr, "curtext=\"%s\", curimage=\"%s\", x=%g, y=%g, width=%g, height=%g\n", curtext, curimagename, x, y, width, height);
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if (curimage)
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{
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if (prevface == DOCFONT_MAX)
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// Image
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if (prevface != DOCFONT_MAX)
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{
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pdfioContentTextBegin(dd->st);
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pdfioContentTextMoveTo(dd->st, x, y);
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pdfioContentTextEnd(dd->st);
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prevface = DOCFONT_MAX;
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}
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pdfioContentSetTextFont(dd->st, docfont_names[prevface = curface], fontsize);
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}
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if (color != dd->color)
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set_color(dd, color);
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if (x > left && curws)
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{
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pdfioContentTextShowf(dd->st, UNICODE_VALUE, " %s", curtext);
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x += width + wswidth;
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pdfioContentDrawImage(dd->st, curimagename, x, y, width, height);
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}
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else
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{
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pdfioContentTextShow(dd->st, UNICODE_VALUE, curtext);
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x += width;
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// Text
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if (curface != prevface)
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{
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if (prevface == DOCFONT_MAX)
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{
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pdfioContentTextBegin(dd->st);
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pdfioContentTextMoveTo(dd->st, x, y);
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}
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pdfioContentSetTextFont(dd->st, docfont_names[prevface = curface], fontsize);
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}
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if (color != dd->color)
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set_color(dd, color);
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if (x > left && curws)
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{
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pdfioContentTextShowf(dd->st, UNICODE_VALUE, " %s", curtext);
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x += width + wswidth;
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}
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else
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{
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pdfioContentTextShow(dd->st, UNICODE_VALUE, curtext);
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x += width;
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}
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}
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if (blocktype == MMD_TYPE_CODE_BLOCK)
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@ -632,6 +800,9 @@ main(int argc, // I - Number of command-line arguments
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return (1);
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}
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// Add images...
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add_images(&dd, doc);
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// Parse the markdown document...
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format_doc(&dd, doc, dd.art_box.x1, dd.art_box.x2);
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235
examples/md2pdf.md
Normal file
235
examples/md2pdf.md
Normal file
@ -0,0 +1,235 @@
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---
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title: Mini-Markdown Test Document
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...
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All heading levels are supported from 1 to 6, using both the ATX and Setext
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forms. As an indented code block:
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# Heading 1
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## Heading 2
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### Heading 3
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#### Heading 4
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##### Heading 5
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###### Heading 6
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Setext Heading 1
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================
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Setext Heading 2
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----------------
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As block headings:
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# Heading 1
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## Heading 2
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### Heading 3
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#### Heading 4
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##### Heading 5
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###### Heading 6
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Setext Heading 1
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================
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Setext Heading 2
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----------------
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And block quotes:
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> # BQ Heading 1
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> ## BQ Heading 2
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> ### BQ Heading 3
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> #### BQ Heading 4
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> ##### BQ Heading 5
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> ###### BQ Heading 6
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>
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> Setext Heading 1
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> ================
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>
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> Setext Heading 2
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> ----------------
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And ordered lists:
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1. First item.
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2. Second item.
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3. Third item with very long text that wraps
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across multiple lines.
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With a secondary paragraph associated with
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the third item.
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And unordered lists:
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- First item.
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+ Second item.
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* Third item.
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* [ ] Fourth item (unchecked)
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- [x] Fifth item (checked)
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Code block with `\``:
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```
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#include <stdio.h>
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int main(void)
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{
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puts("Hello, World!");
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return (0);
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}
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~~~
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```
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Code block with `~`:
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~~~
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#include <stdio.h>
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int main(void)
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{
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puts("Hello, World!");
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return (0);
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}
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```
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~~~
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Link to [mmd web site](https://michaelrsweet.github.io/mmd).
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Normal link to [Heading 1](@).
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Code link to [`Heading 2`](@).
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Inner emphasized link to [*Heading 3*](@).
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Outer emphasized link to *[Heading 3](@)*.
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Inner strong link to [**Heading 4**](@).
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Outer strong link to **[Heading 4](@)**.
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Implicit link to [reference1][].
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Shortcut link to [reference1] without a link title.
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[reference1]: https://michaelrsweet.github.io/mmd 'MMD Home Page'
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[reference2]: https://michaelrsweet.github.io/mmd/mmd.html 'MMD Documentation'
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[reference3]: https://michaelrsweet.github.io/mmd/mmd-160.png "MMD Logo"
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Link to [mmd web site][reference1] works.
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Link to [mmd documentation][reference2] works.
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Link to ![mmd logo][reference3] image.
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Link to [bad reference][reference4] doesn't work.
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Autolink to <https://michaelrsweet.github.io/mmd>.
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Autolink in parenthesis (<https://michaelrsweet.github.io/mmd>).
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[Link broken
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across two lines](https://michaelrsweet.github.io/mmd)
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Color JPEG Image: 
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Grayscale JPEG Image: 
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Color PNG Image: 
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Grayscale PNG Image: 
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Indexed PNG Image: 
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This sentence contains *Emphasized Text*, **Bold Text**, and `Code Text` for
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testing the MMD parser. The `<mmd.h>` header file.
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This sentence contains _Emphasized Text_, __Bold Text__, and
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~~Strikethrough Text~~ for testing the MMD parser.
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*Emphasized Text Split
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Across Two Lines*
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**Bold Text Split
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Across Two Lines**
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`Code Text Split
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Across Two lines`
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_Emphasized Text Split
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Across Two Lines_
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__Bold Text Split
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Across Two Lines__
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~~Strikethrough Text Split
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Across Two Lines~~
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All work and no play makes Johnny a dull boy.
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All work and no play makes Johnny a dull boy.
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All work and no play makes Johnny a dull boy.
|
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All work and no play makes Johnny a dull boy.
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All work and no play makes Johnny a dull boy.
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All work and no play makes Johnny a dull boy.
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\(Escaped Parenthesis)
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\(*Emphasized Parenthesis*)
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\(**Boldface Parenthesis**)
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\(`Code Parenthesis`)
|
||||
|
||||
Escaped backtick (`\``)
|
||||
|
||||
Table as code:
|
||||
|
||||
| Heading 1 | Heading 2 | Heading 3 |
|
||||
| --------- | --------- | --------- |
|
||||
| Cell 1,1 | Cell 1,2 | Cell 1,3 |
|
||||
| Cell 2,1 | Cell 2,2 | Cell 2,3 |
|
||||
| Cell 3,1 | Cell 3,2 | Cell 3,3 |
|
||||
|
||||
Table with leading/trailing pipes:
|
||||
|
||||
| Heading 1 | Heading 2 | Heading 3 |
|
||||
| --------- | --------- | --------- |
|
||||
| Cell 1,1 | Cell 1,2 | Cell 1,3 |
|
||||
| Cell 2,1 | Cell 2,2 | Cell 2,3 |
|
||||
| Cell 3,1 | Cell 3,2 | Cell 3,3 |
|
||||
|
||||
Table without leading/trailing pipes:
|
||||
|
||||
Heading 1 | Heading 2 | Heading 3
|
||||
--------- | --------- | ---------
|
||||
Cell 1,1 | Cell 1,2 | Cell 1,3
|
||||
Cell 2,1 | Cell 2,2 | Cell 2,3
|
||||
Cell 3,1 | Cell 3,2 | Cell 3,3
|
||||
|
||||
Table with alignment:
|
||||
|
||||
Left Alignment | Center Alignment | Right Alignment
|
||||
:-------- | :-------: | --------:
|
||||
Cell 1,1 | Cell 1,2 | 1
|
||||
Cell 2,1 | Cell 2,2 | 12
|
||||
Cell 3,1 | Cell 3,2 | 123
|
||||
|
||||
Table in block quote:
|
||||
|
||||
> Heading 1 | Heading 2 | Heading 3
|
||||
> --------- | --------- | ---------
|
||||
> Cell 1,1 | Cell 1,2 | Cell 1,3
|
||||
> Cell 2,1 | Cell 2,2 | Cell 2,3
|
||||
> Cell 3,1 | Cell 3,2 | Cell 3,3
|
||||
|
||||
# Tests for Bugs/Edge Cases
|
||||
|
||||
Paragraph with "|" that should not
|
||||
be interpreted as a table.
|
||||
|
||||
code before a bulleted list
|
||||
|
||||
- First item
|
||||
- Second item
|
||||
- Some pathological nested link and inline style features supported by
|
||||
CommonMark like "`******Really Strong Text******`".
|
||||
Loading…
Reference in New Issue
Block a user