Bug 64509

Problem description: 

There are many fonts in existence, yet one's system doesn't have it all installed.

There are fonts which originated from real world types (digitized fonts), but each type designer or foundry made it differently from each other.

They are the so called fonts variations, as Adobe Caslon (Carol Twombly based on William Caslon's specimens pages), and ITC Founder's Caslon (digitized by Justin Howes, based on  resources of the St. Bride Printing Library).

And there are fonts whose types originated on the virtual world (virtual typefaces), even if the initial drawings were made on paper. These fonts could have been abandoned by their designers or foundries, but adopted by others; they could have been licensed in such a way the name of the font should be changed; or they could have intended variations for each script so to avoid software issues.

The primary examples for the first case are the TeX GYRE Collection of Fonts (Bonum, Chorus, Cursor, Heros, Pagella, Schola, Termes are all based, respectively, on URW Gothic L, URW Bookman L, URW Chancery L Medium Italic, URW Nimbus Mono L - itself based on IBM's Courier, URW Nimbus Sans - itself based on Helvetica, URW Palladio L, URW Century Schoolbook L, Nimbus Roman No9 L - itself based on Times); for the second case we have the BitStream Vera and DejaVu families of fonts; and for the latter we have the DejaVu and DejaVu LGC (which contains only Latin, Greek, and Cyrillic characters, instead of Chinese, Japanese, Korean and Arabic characters).

To ease the life of many users not typographic savvy, LibreOffice should have a preinstalled font substitution table, at the same time it should indicate when the fonts needed to render a file isn't installed on the system (such as a warning when opening it).

Steps to reproduce:

1. Create a document on a machine which has, for example, the Calligraffiti font installed (a calligraphic font available for free at http://www.fontsquirrel.com/fonts/calligraffiti), and format it to use the font.
2. Send it to another user who doesn't have the font (or just uninstall the font from the system).
3. Open the file on a system without the font.

Current behavior:

LibreOffice doesn't show any messages the font specified on the file doesn't exist on the system; worse, it shows the name of the font on the toolbar and presents it as the sans serif font DejaVu Sans.

Expected behavior:

LibreOffice should warn the user that because the Calligraffiti font isn't available on the system it will use <font name> on its place.

And for the well known families of fonts which have been substituted, such as the TeX GYRE Fonts (http://www.gust.org.pl/projects-1/e-foundry/tex-gyre), LibreOffice could have it prepopulated on the font substitution table.
Operating System: All
Version: unspecified