diff options
Diffstat (limited to 'desktop/print.c')
-rw-r--r-- | desktop/print.c | 280 |
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; +} |