Change Markdown renderer to statically link hoedown

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "src/hoedown"]
+	path = src/hoedown
+	url = git@github.com:hoedown/hoedown.git

CMakeLists.txt

@@ -21,9 +21,21 @@ add_custom_command(OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/resources.c"
 	COMMENT "Generating resources"
 )
 
+add_custom_command(OUTPUT "${CMAKE_CURRENT_SOURCE_DIR}/src/hoedown/libhoedown.a"
+	COMMAND make libhoedown.a
+	WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/src/hoedown"
+	COMMENT "Compiling libhoedown"
+)
+
+ADD_LIBRARY(HOEDOWN STATIC IMPORTED)
+SET_TARGET_PROPERTIES(HOEDOWN PROPERTIES
+    IMPORTED_LOCATION "${CMAKE_CURRENT_SOURCE_DIR}/src/hoedown/libhoedown.a"
+)
+
 aux_source_directory(./src SRC_LIST)
 add_executable(${PROJECT_NAME} ${SRC_LIST})
 target_sources(${PROJECT_NAME} PUBLIC "${CMAKE_CURRENT_BINARY_DIR}/resources.c")
-target_link_libraries(${PROJECT_NAME} ${GTK3_LIBRARIES} ${WEBKIT_LIBRARIES})
+target_sources(${PROJECT_NAME} PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/src/hoedown/libhoedown.a")
+target_link_libraries(${PROJECT_NAME} ${GTK3_LIBRARIES} ${WEBKIT_LIBRARIES} HOEDOWN)
 
 install (TARGETS ${PROJECT_NAME} DESTINATION bin)

demo-workspace/2018-01-26.md

@@ -13,7 +13,7 @@ Renders everything as is. You will see the source code except for the header abo
 The following constructs are supported: *italics*, **bold**, Headings 1 to 4.
 
 ## Full HTML with Images
-As the external md command is invoked and a web browser used to render the content, all markdown syntax supported by the md command is supported.
+Markdown is rendered using [Hoedown](https://github.com/hoedown/hoedown/) and displayed using an integrated web browser. This all Markdown syntax (including images) are supported.
 
 # Encrypted Entries Using GPG
 MDiary supports gpg encrypted entries. To use this feature, place a gpg encrypted entry as *<name>.md.gpg* in the workspace. MDiary will automatically show a decrypt button in the header bar which will invoke gpg to decrypt all encrypted entries in the workspace for this session.

src/hoedown

@@ -0,0 +1 @@
+Subproject commit 980b9c549b4348d50b683ecee6abee470b98acda

src/mainwindow.c

@@ -771,16 +771,18 @@ void mainWindow_calendarSelected(GtkWidget *widget, gpointer user_data)
 
 static void mainWindow_set_text(struct mainWindow *mainWindow, gchar *text, gchar *file_url)
 {
-	gchar *tempfile_path = "/tmp/mdiary.tmp.md";
 	gchar *cmd	  = NULL;
 	gchar *cmd_stdout = NULL;
 	gchar *cmd_stderr = NULL;
-	gint exit_status  = 0;
-	gchar *base_url   = NULL;
 	GFileOutputStream *stream = NULL;
 	GFile *file       = NULL;
 	GtkTextIter iter;
 	GtkTextIter iter_end;
+	hoedown_buffer *ob;
+	hoedown_renderer *renderer = NULL;
+	void (*renderer_free)(hoedown_renderer *) = NULL;
+	hoedown_document *document;
+	gchar *base_url   = NULL;
 
 	if (mainWindow->renderer == RENDERER_TEXT) {
 		gtk_text_buffer_set_text(mainWindow->textBuffer, text, strlen(text));
@@ -802,24 +804,21 @@ static void mainWindow_set_text(struct mainWindow *mainWindow, gchar *text, gcha
 	} else {
 		if (text[0] != '\0') {
 			base_url = g_strdup_printf("file://%s", file_url);
-			file = g_file_new_for_path(tempfile_path);
-			stream = g_file_replace(
-						file, NULL, FALSE,
-						G_FILE_CREATE_NONE,
-						NULL, NULL);
-			g_output_stream_write(G_OUTPUT_STREAM(stream), text, strlen(text), NULL, NULL);
-			g_output_stream_flush(G_OUTPUT_STREAM(stream), NULL, NULL);
+			g_info("Rendering markdown as full HTML...");
 
-			cmd = g_strdup_printf("markdown %s", tempfile_path);
-			if (g_spawn_command_line_sync(cmd, &cmd_stdout, &cmd_stderr, &exit_status, NULL) &&
-					exit_status == 0) {
-				webkit_web_view_load_html(WEBKIT_WEB_VIEW(mainWindow->webkitView),
-							  cmd_stdout, base_url);
-			} else {
-				g_warning("Could not render markdown for file. Showing plain text instead.\n");
-				webkit_web_view_load_html(WEBKIT_WEB_VIEW(mainWindow->webkitView),
-							  text, base_url);
-			}
+			renderer = hoedown_html_renderer_new(0, 0);
+			renderer_free = hoedown_html_renderer_free;
+
+			ob = hoedown_buffer_new(64);
+			document = hoedown_document_new(renderer, 0, 16);
+			hoedown_document_render(document, ob, (const uint8_t *) text, strlen(text));
+
+			webkit_web_view_load_html(WEBKIT_WEB_VIEW(mainWindow->webkitView),
+						  hoedown_buffer_cstr(ob), base_url);
+
+			hoedown_buffer_free(ob);
+			hoedown_document_free(document);
+			renderer_free(renderer);
 			g_free(base_url);
 		} else {
 			webkit_web_view_load_html(WEBKIT_WEB_VIEW(mainWindow->webkitView),

src/mainwindow.h

@@ -8,6 +8,9 @@
 #include "mdiary.h"
 #include "md_pango.h"
 
+#include "hoedown/src/document.h"
+#include "hoedown/src/html.h"
+
 #define FILE_LIST_MAX_LEN 5
 
 enum {