mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-12-18 02:02:36 +03:00
ad343eccb1
This cleans up this header and moves the functionality into more useful places while reducing the include complexity but only pulling in whats required.
327 lines
8.9 KiB
C
327 lines
8.9 KiB
C
/*
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* Copyright 2008 Adam Blokus <adamblokus@gmail.com>
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** \file
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* Implementation of paginated output.
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*/
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#include "utils/config.h"
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#include <assert.h>
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#include <string.h>
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#include <dom/dom.h>
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#include "utils/nsoption.h"
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#include "utils/log.h"
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#include "utils/talloc.h"
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#include "content/content.h"
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#include "content/hlcache.h"
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#include "css/utils.h"
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#include "render/box.h"
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#include "desktop/print.h"
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#include "desktop/printer.h"
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/* Default print settings */
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#define DEFAULT_PAGE_WIDTH 595
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#define DEFAULT_PAGE_HEIGHT 840
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#define DEFAULT_COPIES 1
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static hlcache_handle *print_init(hlcache_handle *, struct print_settings *);
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static bool print_apply_settings(hlcache_handle *, struct print_settings *);
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static float page_content_width, page_content_height;
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static hlcache_handle *printed_content;
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static float done_height;
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bool html_redraw_printing = false;
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int html_redraw_printing_border = 0;
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int html_redraw_printing_top_cropped = 0;
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/**
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* This function calls print setup, prints page after page until the whole
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* content is printed calls cleaning up afterwise.
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*
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* \param content The content to be printed
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* \param printer The printer interface for the printer to be used
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* \param settings The settings for printing to use
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* \return true if successful, false otherwise
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*/
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bool print_basic_run(hlcache_handle *content,
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const struct printer *printer,
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struct print_settings *settings)
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{
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bool ret = true;
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assert(content != NULL && printer != NULL && settings != NULL);
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if (print_set_up(content, printer, settings, NULL))
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return false;
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while (ret && (done_height < content_get_height(printed_content)) ) {
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ret = print_draw_next_page(printer, settings);
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}
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print_cleanup(content, printer, settings);
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return ret;
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}
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/**
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* This function prepares the content to be printed. The current browser content
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* is duplicated and resized, printer initialization is called.
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*
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* \param content The content to be printed
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* \param printer The printer interface for the printer to be used
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* \param settings The settings for printing to use
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* \param height updated to the height of the printed content
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* \return true if successful, false otherwise
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*/
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bool print_set_up(hlcache_handle *content,
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const struct printer *printer, struct print_settings *settings,
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double *height)
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{
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printed_content = print_init(content, settings);
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if (printed_content == NULL)
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return false;
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print_apply_settings(printed_content, settings);
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if (height)
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*height = content_get_height(printed_content);
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printer->print_begin(settings);
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done_height = 0;
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return true;
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}
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/**
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* This function draws one page, beginning with the height offset of done_height
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*
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* \param printer The printer interface for the printer to be used
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* \param settings The settings for printing to use
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* \return true if successful, false otherwise
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*/
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bool print_draw_next_page(const struct printer *printer,
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struct print_settings *settings)
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{
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struct rect clip;
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struct content_redraw_data data;
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struct redraw_context ctx = {
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.interactive = false,
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.background_images = !nsoption_bool(remove_backgrounds),
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.plot = printer->plotter
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};
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html_redraw_printing_top_cropped = INT_MAX;
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clip.x0 = 0;
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clip.y0 = 0;
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clip.x1 = page_content_width * settings->scale;
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clip.y1 = page_content_height * settings->scale;
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data.x = 0;
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data.y = -done_height;
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data.width = 0;
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data.height = 0;
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data.background_colour = 0xFFFFFF;
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data.scale = settings->scale;
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data.repeat_x = false;
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data.repeat_y = false;
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html_redraw_printing = true;
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html_redraw_printing_border = clip.y1;
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printer->print_next_page();
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if (!content_redraw(printed_content, &data, &clip, &ctx))
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return false;
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done_height += page_content_height -
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(html_redraw_printing_top_cropped != INT_MAX ?
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clip.y1 - html_redraw_printing_top_cropped : 0) /
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settings->scale;
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return true;
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}
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/**
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* The content passed to the function is duplicated with its boxes, font
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* measuring functions are being set.
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*
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* \param content The content to be printed
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* \param settings The settings for printing to use
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* \return true if successful, false otherwise
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*/
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hlcache_handle *print_init(hlcache_handle *content,
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struct print_settings *settings)
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{
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hlcache_handle* printed_content;
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hlcache_handle_clone(content, &printed_content);
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return printed_content;
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}
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/**
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* The content is resized to fit page width.
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*
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* \param content The content to be printed
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* \param settings The settings for printing to use
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* \return true if successful, false otherwise
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*/
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bool print_apply_settings(hlcache_handle *content,
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struct print_settings *settings)
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{
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if (settings == NULL)
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return false;
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/* Apply settings - adjust page size etc */
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page_content_width = (settings->page_width -
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FIXTOFLT(FSUB(settings->margins[MARGINLEFT],
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settings->margins[MARGINRIGHT]))) / settings->scale;
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page_content_height = (settings->page_height -
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FIXTOFLT(FSUB(settings->margins[MARGINTOP],
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settings->margins[MARGINBOTTOM]))) / settings->scale;
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content_reformat(content, false, page_content_width, 0);
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LOG(("New layout applied.New height = %d ; New width = %d ",
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content_get_height(content),
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content_get_width(content)));
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return true;
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}
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/**
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* Memory allocated during printing is being freed here.
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*
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* \param content The original content
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* \param printer The printer interface for the printer to be used
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* \return true if successful, false otherwise
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*/
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bool print_cleanup(hlcache_handle *content, const struct printer *printer,
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struct print_settings *settings)
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{
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printer->print_end();
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html_redraw_printing = false;
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if (printed_content) {
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hlcache_handle_release(printed_content);
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}
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free((void *)settings->output);
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free(settings);
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return true;
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}
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/**
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* Generates one of the predefined print settings sets.
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*
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* \param configuration the requested configuration
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* \param filename the filename or NULL
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* \param font handling functions
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* \return print_settings in case if successful, NULL if unknown
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* configuration or lack of memory.
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*/
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struct print_settings *print_make_settings(print_configuration configuration,
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const char *filename, const struct font_functions *font_func)
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{
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struct print_settings *settings;
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css_fixed length = 0;
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css_unit unit = CSS_UNIT_MM;
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switch (configuration){
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case PRINT_DEFAULT:
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settings = (struct print_settings*)
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malloc(sizeof(struct print_settings));
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if (settings == NULL)
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return NULL;
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settings->page_width = DEFAULT_PAGE_WIDTH;
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settings->page_height = DEFAULT_PAGE_HEIGHT;
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settings->copies = DEFAULT_COPIES;
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settings->scale = DEFAULT_EXPORT_SCALE;
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length = INTTOFIX(DEFAULT_MARGIN_LEFT_MM);
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settings->margins[MARGINLEFT] =
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nscss_len2px(length, unit, NULL);
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length = INTTOFIX(DEFAULT_MARGIN_RIGHT_MM);
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settings->margins[MARGINRIGHT] =
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nscss_len2px(length, unit, NULL);
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length = INTTOFIX(DEFAULT_MARGIN_TOP_MM);
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settings->margins[MARGINTOP] =
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nscss_len2px(length, unit, NULL);
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length = INTTOFIX(DEFAULT_MARGIN_BOTTOM_MM);
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settings->margins[MARGINBOTTOM] =
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nscss_len2px(length, unit, NULL);
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break;
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/* use settings from the Export options tab */
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case PRINT_OPTIONS:
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settings = (struct print_settings*)
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malloc(sizeof(struct print_settings));
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if (settings == NULL)
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return NULL;
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settings->page_width = DEFAULT_PAGE_WIDTH;
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settings->page_height = DEFAULT_PAGE_HEIGHT;
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settings->copies = DEFAULT_COPIES;
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settings->scale = (float)nsoption_int(export_scale) / 100;
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length = INTTOFIX(nsoption_int(margin_left));
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settings->margins[MARGINLEFT] =
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nscss_len2px(length, unit, NULL);
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length = INTTOFIX(nsoption_int(margin_right));
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settings->margins[MARGINRIGHT] =
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nscss_len2px(length, unit, NULL);
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length = INTTOFIX(nsoption_int(margin_top));
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settings->margins[MARGINTOP] =
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nscss_len2px(length, unit, NULL);
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length = INTTOFIX(nsoption_int(margin_bottom));
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settings->margins[MARGINBOTTOM] =
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nscss_len2px(length, unit, NULL);
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break;
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default:
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return NULL;
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}
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/* Set font functions */
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settings->font_func = font_func;
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/* Output filename, or NULL if printing */
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if (filename != NULL) {
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settings->output = strdup(filename);
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if (settings->output == NULL) {
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free(settings);
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return NULL;
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}
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} else
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settings->output = NULL;
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return settings;
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}
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