First merge of Adam Blokus' GSoC work from his branch 'branches/adamblokus/netsurf'.

Merged revisions 4212-4552,4554-4709,4711-4724 via svnmerge from 
svn://svn.netsurf-browser.org/branches/adamblokus/netsurf

........
  r4212 | adamblokus | 2008-05-26 19:42:31 +0200 (Mon, 26 May 2008) | 4 lines
  
  Pdf plotting skeleton pinned on Print Preview in GTK.
  Just creates a file and draws lines. 
........
  r4213 | adamblokus | 2008-05-27 00:11:03 +0200 (Tue, 27 May 2008) | 4 lines
  
  Pdf plotter - added drawing some graphic primitives.
  Still with limited functionality, but a snapshot of the
  currently viewed page can be made and resembles the original.
........
  r4214 | adamblokus | 2008-05-27 11:43:31 +0200 (Tue, 27 May 2008) | 2 lines
  
  Corrected encoding name
........
  r4215 | adamblokus | 2008-05-27 12:47:26 +0200 (Tue, 27 May 2008) | 3 lines
  
  Colours and polygons added.
........
  r4217 | adamblokus | 2008-05-27 21:39:35 +0200 (Tue, 27 May 2008) | 6 lines
  
  Added rectangles, filled boxes and clipping.
  Taken into consideration joty's comments.
  Added a todo list for this part.
  Added some debug stuff and checking boundaries.
........
  r4218 | adamblokus | 2008-05-28 12:37:30 +0200 (Wed, 28 May 2008) | 2 lines
  
  Added path ploting (not sure if valid argument order for bezier) and dashed/dotted line styles
........
  r4221 | adamblokus | 2008-05-28 22:11:05 +0200 (Wed, 28 May 2008) | 3 lines
  
  Some more options in graphic primitives and normalizing some parameters.
........
  r4235 | adamblokus | 2008-05-31 22:54:56 +0200 (Sat, 31 May 2008) | 4 lines
  
  Plotting changed as jmb suggested (is the least invasive one from the possible)
  Added dummy bitmap plotting - way of plotting an image is determined by its type. 
........
  r4251 | adamblokus | 2008-06-03 17:12:15 +0200 (Tue, 03 Jun 2008) | 3 lines
  
  Added plotting jpg and png images - quite a lot to improve in this code, but it seems to work ;)
........
  r4263 | adamblokus | 2008-06-05 14:20:32 +0200 (Thu, 05 Jun 2008) | 3 lines
  
  Added hadling images other than png and jpeg - with transparency.
........
  r4267 | adamblokus | 2008-06-06 15:36:34 +0200 (Fri, 06 Jun 2008) | 5 lines
  
  Added handling NULL-returns from all mallocs.
  Added plot_bitmap_tile handling.
  Changed code style a little.
........
  r4327 | adamblokus | 2008-06-12 17:46:34 +0200 (Thu, 12 Jun 2008) | 5 lines
  
  Added a first prototype of the paged-output organization.
  Still not sure about naming, file locations etc.
  Works with the same pdf plotting as before.
........
  r4328 | adamblokus | 2008-06-13 13:52:15 +0200 (Fri, 13 Jun 2008) | 4 lines
  
  Added primitive width adjustment and outputing the whole
  website in multiple pages.
........
  r4336 | joty | 2008-06-15 15:06:57 +0200 (Sun, 15 Jun 2008) | 1 line
  
  Fix RISC OS build failure (change r4235 wasn't complete).
........
  r4337 | joty | 2008-06-15 18:15:32 +0200 (Sun, 15 Jun 2008) | 16 lines
  
  This enables "Export PDF" in RISC OS build:
  
  - Docs/Doxyfile(PREDEFINED): Added WITH_PDF_EXPORT
  - Makefile.sources(S_PDF): Add to RISC OS target as well.
  - utils/config.h: Define WITH_PDF_EXPORT which controls if we want to have
    PDF export functionality or not.
  - riscos/save_pdf.c,riscos/save_pdf.h(save_as_pdf): Use PDF print API made
    by Adam Blokus to write a PDF file under RISC OS.
  - riscos/save.c: Call save_as_pdf added.
  - riscos/menus.c: Add 'Export->PDF' menu entry.
  - riscos/menus.h(menu_action): Added BROWSER_EXPORT_PDF.
  - desktop/gui.h(gui_save_type): Added GUI_SAVE_PDF.
  - desktop/print.c(print_run): Added return value.
  - Makefile(CCACHE): Moved closed to the place where CC is set for the first time.
    (LDFLAGS): Centralised adding all non-pkgconfig libraries and added Haru + PNG libs.
........
  r4343 | adamblokus | 2008-06-16 01:08:52 +0200 (Mon, 16 Jun 2008) | 3 lines
  
  Added margins and page size adjustment.
........
  r4412 | adamblokus | 2008-06-21 20:22:07 +0200 (Sat, 21 Jun 2008) | 4 lines
  
  Added 'fuzzy' margins on page bottom. 
  Disabled direct png embedding, because it is too unstable in Haru now.
........
  r4421 | adamblokus | 2008-06-22 18:52:28 +0200 (Sun, 22 Jun 2008) | 2 lines
  
  Added "Save as.." dialog and Export->PDF menu entry. Print preview still works with default path.
........
  r4437 | adamblokus | 2008-06-25 02:44:46 +0200 (Wed, 25 Jun 2008) | 4 lines
  
  Added skeleton of applying loose layout.
  Minor code cleaning-up.
........
  r4492 | adamblokus | 2008-07-02 09:02:42 +0200 (Wed, 02 Jul 2008) | 5 lines
  
  Implemented the elementar ideas of the loose layout.
  Added scaling in the printing routine.
  Added some basic demonstrations.
........
  r4493 | adamblokus | 2008-07-02 09:05:55 +0200 (Wed, 02 Jul 2008) | 3 lines
  
  Cleaned up the loosing code - commited to much of leftover rubbish code.
........
  r4507 | adamblokus | 2008-07-04 14:25:48 +0200 (Fri, 04 Jul 2008) | 4 lines
  
  Added duplicating box tree and current content - window flickering during printing solved.
  Minor error checking after new HPDF_Image_AddSMask call.
........
  r4515 | adamblokus | 2008-07-06 22:28:16 +0200 (Sun, 06 Jul 2008) | 2 lines
  
  Changes in loosen layout (image resizing).
........
  r4517 | adamblokus | 2008-07-06 22:38:23 +0200 (Sun, 06 Jul 2008) | 2 lines
  
  Added pdf font handling and rendering functions with the use of Haru functions.
........
  r4555 | adamblokus | 2008-07-10 00:59:05 +0200 (Thu, 10 Jul 2008) | 2 lines
  
  Added a very basic and still buggy GTK print implementation.
........
  r4565 | adamblokus | 2008-07-10 14:50:16 +0200 (Thu, 10 Jul 2008) | 2 lines
  
  Added gtk printing one more time - I have forgotten to add the main file.
........
  r4566 | adamblokus | 2008-07-10 14:57:02 +0200 (Thu, 10 Jul 2008) | 2 lines
  
  removed error with comment
........
  r4569 | adamblokus | 2008-07-10 15:52:55 +0200 (Thu, 10 Jul 2008) | 5 lines
  
  Major style improvements - added a lot of doxygen comments, 
  followed tlsa's style guide.
  Added some more error checking, too.
........
  r4575 | adamblokus | 2008-07-10 18:48:26 +0200 (Thu, 10 Jul 2008) | 2 lines
  
  Cleaned up the code.
........
  r4687 | adamblokus | 2008-07-17 14:17:19 +0200 (Thu, 17 Jul 2008) | 2 lines
  
  Changed everything according to jmb's review plus some minor bug fixes to gtk_print.
........
  r4688 | adamblokus | 2008-07-17 17:16:34 +0200 (Thu, 17 Jul 2008) | 2 lines
  
  Solved the netsurf.glade clash from r4421.
........
  r4693 | adamblokus | 2008-07-18 18:11:51 +0200 (Fri, 18 Jul 2008) | 2 lines
  
  Fixed bug with wrong number of pages in gtk printing.
........
  r4695 | adamblokus | 2008-07-18 19:59:24 +0200 (Fri, 18 Jul 2008) | 3 lines
  
  - fixed uncommented line from the previous commit
  - fixed bug with scale bigger than 1.0 (incorretly clipped page)
........
  r4696 | adamblokus | 2008-07-18 23:28:00 +0200 (Fri, 18 Jul 2008) | 2 lines
  
  Fixed bug in gtk_print_font_paint (and nsfont_paint).
........
  r4697 | adamblokus | 2008-07-18 23:35:38 +0200 (Fri, 18 Jul 2008) | 2 lines
  
  Bug fix in nsfont_paint.
........
  r4711 | adamblokus | 2008-07-19 22:44:15 +0200 (Sat, 19 Jul 2008) | 2 lines
  
  Added gtk_selection files.
........
  r4712 | adamblokus | 2008-07-20 11:15:06 +0200 (Sun, 20 Jul 2008) | 2 lines
  
  Addam missing glade files.
........
  r4713 | joty | 2008-07-20 17:13:10 +0200 (Sun, 20 Jul 2008) | 1 line
  
  Follow change r4517 for RISC OS and BeOS platforms : Added pdf font handling and rendering functions with the use of Haru functions.
........
  r4714 | joty | 2008-07-20 18:19:50 +0200 (Sun, 20 Jul 2008) | 1 line
  
  Declare haru_nsfont iso define an instance for each C source including the font_haru.h header.  This fixes breakage of PDF export on RISC OS.
........
  r4724 | adamblokus | 2008-07-23 03:30:08 +0200 (Wed, 23 Jul 2008) | 6 lines
  
  Applied changes according to joty's review.
  Added checking the dimensions of a plotted image to pdf plotter.
  Commented out jpg embedding (it seems to cause some problems
  I'll bring it back when I figure out what's wrong) .
  Added back some files removed by mistake.
........


svn path=/trunk/netsurf/; revision=4741

1 files changed, 280 insertions, 0 deletions

diff --git a/desktop/print.c b/desktop/print.c
new file mode 100644
index 000000000..0852fa34c
--- /dev/null
+++ b/desktop/print.c
@@ -0,0 +1,280 @@
+/*
+ * Copyright 2008 Adam Blokus <adamblokus@gmail.com>
+ *
+ * This file is part of NetSurf, http://www.netsurf-browser.org/
+ *
+ * NetSurf is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * NetSurf is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** \file
+ * Output-in-pages implementation
+*/
+
+#include "desktop/print.h"
+#include "desktop/printer.h"
+
+#include "content/content.h"
+
+#include "utils/log.h"
+#include "utils/talloc.h"
+
+#include "render/loosen.h"
+#include "render/box.h"
+
+#include "pdf/font_haru.h"
+
+static struct content *print_init(struct content *, struct print_settings *);
+static bool print_apply_settings(struct content *, struct print_settings *);
+
+
+/*TODO:	should these be passed as parameters in order to allow simultaneous
+	printings?
+*/
+static float page_content_width, page_content_height;
+static float text_margin_height;
+static struct content *printed_content;
+static float done_height;
+
+/**
+ * This function calls print setup, prints page after page until the whole
+ * content is printed calls cleaning up afterwise.
+ * \param content The content to be printed
+ * \param printer The printer interface for the printer to be used
+ * \param settings The settings for printing to use or NULL for DEFAULT
+ * \return true if successful, false otherwise
+*/
+bool print_basic_run(struct content *content,
+		const struct printer *printer,
+		struct print_settings *settings)
+{
+	bool ret = true;
+
+	if (settings == NULL)
+		settings = print_make_settings(DEFAULT);
+
+	if (!print_set_up(content, printer, settings, NULL))
+		ret = false;
+	
+	while (ret && (done_height < printed_content->height) )
+		ret = print_draw_next_page(printer, settings);
+
+	print_cleanup(content, printer);
+	
+	return ret;
+}
+
+/**
+ * This function prepares the content to be printed. The current browser content
+ * is duplicated and resized, printer initialization is called.
+ * \param content The content to be printed
+ * \param printer The printer interface for the printer to be used
+ * \param settings The settings for printing to use
+ * \param height updated to the height of the printed content
+ * \return true if successful, false otherwise
+*/
+bool print_set_up(struct content *content,
+		const struct printer *printer, struct print_settings *settings,
+		double *height)
+{
+
+	printed_content = print_init(content, settings);
+	
+	if (!printed_content)
+		return false;
+	
+	print_apply_settings(printed_content, settings);
+
+	if (height)
+		*height = printed_content->height;
+	
+	printer->print_begin(settings);
+
+	done_height = 0;
+	
+	return true;	
+}
+
+/**
+ * This function draws one page, beginning with the height offset of done_height
+ * \param printer The printer interface for the printer to be used
+ * \param settings The settings for printing to use
+ * \return true if successful, false otherwise
+ */
+bool print_draw_next_page(const struct printer *printer,
+			struct print_settings *settings)
+{
+	
+	/*TODO:Plotter will have to be duplicated and passed
+	as an argument - to allow simultaneous screen and
+	page plotting*/
+	plot = *(printer->plotter);
+
+	printer->print_next_page();
+	if( !content_redraw(printed_content,
+			0,
+			-done_height,
+			0,0,
+			0,
+			0,
+			page_content_width * settings->scale,
+   			page_content_height  * settings->scale,
+			settings->scale, 0xffffff))
+		return false;
+	done_height += page_content_height - text_margin_height;
+	
+	return true;
+}
+
+/**
+ * The content passed to the function is duplicated with its boxes, font
+ * measuring functions are being set.
+ * \param content The content to be printed
+ * \param settings The settings for printing to use
+ * \return true if successful, false otherwise
+ */
+struct content *print_init(struct content *content,
+		struct print_settings *settings)
+{
+	struct content* printed_content;
+	struct content_user *user_sentinel;
+	
+	content_add_user(content, NULL, (intptr_t)print_init, 0);
+	
+	printed_content = talloc_memdup(content, content, sizeof *content);
+	
+	if (!printed_content)
+		return NULL;
+	
+	printed_content->data.html.bw = 0;
+	
+	user_sentinel = talloc(printed_content, struct content_user);
+	user_sentinel->callback = 0;
+	user_sentinel->p1 = user_sentinel->p2 = 0;
+	user_sentinel->next = 0;
+	printed_content->user_list = user_sentinel;
+	content_add_user(printed_content, NULL, (intptr_t)print_init, 0);
+	
+	printed_content->data.html.layout =
+			box_duplicate_tree(content->data.html.layout,
+					   printed_content);
+	
+	if (!printed_content->data.html.layout)
+		return NULL;
+	
+	if (settings->font_func == NULL)
+ 		printed_content->data.html.font_func = &haru_nsfont;
+	else
+		printed_content->data.html.font_func = settings->font_func;
+	
+	return printed_content;
+}
+
+/**
+ * The content is resized to fit page width. In case it is to wide, it is
+ * loosened.
+ * \param content The content to be printed
+ * \param settings The settings for printing to use
+ * \return true if successful, false otherwise
+ */
+bool print_apply_settings(struct content *content,
+			  struct print_settings *settings)
+{
+	if (settings == NULL)
+		return false;
+	
+	/*Apply settings - adjust page size etc*/
+	
+	text_margin_height = settings->margins[MARGINTEXT];
+	
+	page_content_width = (settings->page_width - settings->margins[MARGINLEFT] - 
+			settings->margins[MARGINRIGHT]) / settings->scale;
+	
+	page_content_height = (settings->page_height - settings->margins[MARGINTOP] - 
+			settings->margins[MARGINBOTTOM]) / settings->scale;
+	
+	content_reformat(content, page_content_width, 0);
+	LOG(("New layout applied.New height = %d ; New width = %d ",
+	     content->height, content->width));
+	
+	if (content->width > page_content_width)
+		return loosen_document_layout(content, content->data.html.layout,
+				page_content_width, page_content_height);
+			
+	return true;	
+}
+
+/**
+ * Memory allocated during printing is being freed here.
+ * \param content The original content
+ * \param printer The printer interface for the printer to be used
+ * \return true if successful, false otherwise
+ */
+bool print_cleanup(struct content *content,
+		   const struct printer *printer)
+{
+	printer->print_end();
+	
+	if (printed_content) {
+		content_remove_user(printed_content, NULL, (intptr_t)print_init, 0);
+		talloc_free(printed_content);
+	}
+	
+	content_remove_user(content, NULL, (intptr_t)print_init, 0);
+	
+	return true;
+}
+
+/**
+ * Generates one of the predefined print settings sets.
+ * \return print_settings in case if successful, NULL if unknown configuration \
+ * 	or lack of memory.
+ */
+struct print_settings *print_make_settings(print_configuration configuration)
+{
+	
+	struct print_settings *settings;
+	
+	switch (configuration){
+		case DEFAULT:	
+			settings = (struct print_settings*) 
+					malloc(sizeof (struct print_settings) );
+			
+			if (settings == NULL)
+				return NULL;
+			
+			settings->page_width  = 595;
+			settings->page_height = 840;
+			settings->copies = 1;
+			/*with 0.7 the pages look the best, the value in 
+			haru_nsfont_apply_style should be kept the same as this
+			*/
+			settings->scale = 0.7;
+			
+			settings->margins[MARGINLEFT] = 30;
+			settings->margins[MARGINRIGHT] = 30;
+			settings->margins[MARGINTOP] = 30;
+			settings->margins[MARGINBOTTOM] = 30;
+			
+			settings->margins[MARGINTEXT] = 10;
+			
+			settings->output = "out.pdf";
+			settings->font_func = &haru_nsfont;
+			
+			break;
+		
+		default:
+			return NULL;
+	}
+	
+	return settings;	
+}