Re: Searching for text in PDF files is wrong
On Fri, Nov 30, 2018 at 09:56:12PM +0100, Радомир Хаџић via gtk-app-devel-list wrote: > I use poppler_page_find_text() to find text in PDF files. This returns > GList of pointers to PopplerRectangles. Then I use > poppler_page_render_selection() to mark the found text. > > What is wrong is that PopplerRectangles returned by > poppler_page_find_text() are incompatible with those that > poppler_page_render_selection() requests, which is why the wrong text > is selected. > > I have found that to make those two compatible, I have to do the > following to PopplerRectangles returned by poppler_page_find_text(): > 1) SWAP(rectangle.x1, rectangle.x2); > 2) SWAP(rectangle.y1, rectangle.y2); > 3) rectangle.y1 = page_height - rectangle.y1; > 4) rectangle.y2 = page_height - rectangle.y2; > But this does not solve the problem because the marked text cycles > between right and wrong again while resizing the window. > is: https://pastebin.com/h3F56Yv7 You're doing in-place coordinate conversions in your drawing code. Every expose event will change the coordinates event, which is why you're seeing the flip-flopping. Do the conversion only once, or use a local temporary PopplerRectangle variable and avoid in-place conversions. (I'm not familiar with poppler's APIs and cannot say if your conversion code is correct.) HTH, Marius Gedminas -- Lutetium is the heaviest and hardest of the rare earth metals, and is used in the production of umlauts and other fraktur font features. -- Charles Stross ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Searching for text in PDF files is wrong
Hi; this list is for the development of applications with GTK; your question relates to Poppler, so you should ask on a Poppler-related mailing list or developers forum, e.g. https://lists.freedesktop.org/mailman/listinfo/poppler Ciao, Emmanuele. On Fri, 30 Nov 2018 at 20:56, Радомир Хаџић via gtk-app-devel-list < gtk-app-devel-list@gnome.org> wrote: > Hi. > > I use poppler_page_find_text() to find text in PDF files. This returns > GList of pointers to PopplerRectangles. Then I use > poppler_page_render_selection() to mark the found text. > > What is wrong is that PopplerRectangles returned by > poppler_page_find_text() are incompatible with those that > poppler_page_render_selection() requests, which is why the wrong text > is selected. > > I have found that to make those two compatible, I have to do the > following to PopplerRectangles returned by poppler_page_find_text(): > 1) SWAP(rectangle.x1, rectangle.x2); > 2) SWAP(rectangle.y1, rectangle.y2); > 3) rectangle.y1 = page_height - rectangle.y1; > 4) rectangle.y2 = page_height - rectangle.y2; > But this does not solve the problem because the marked text cycles > between right and wrong again while resizing the window. > > I have created a small program that illustrates the problem. Here it > is: https://pastebin.com/h3F56Yv7 (I've also sent an attachment but > last time you didn't get it so this paste is a fallback in case you > don't get it again.) > You ought to supply two arguments when running the program: the > absolute path to a PDF file and the text you want to search for, > respectively. Pay attention to the selected text with and without > lines 54-57. > > How can I make the found text to be marked properly? This "workaround" > does not work very well and it is an ugly solution anyway. > ___ > gtk-app-devel-list mailing list > gtk-app-devel-list@gnome.org > https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list > -- https://www.bassi.io [@] ebassi [@gmail.com] ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
