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| 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef CHROME_COMMON_GFX_TEXT_ELIDER_H_ | |
| 6 #define CHROME_COMMON_GFX_TEXT_ELIDER_H_ | |
| 7 | |
| 8 #include <unicode/coll.h> | |
| 9 #include <unicode/uchar.h> | |
| 10 | |
| 11 #include "app/gfx/chrome_font.h" | |
| 12 #include "base/basictypes.h" | |
| 13 #include "base/string16.h" | |
| 14 | |
| 15 class FilePath; | |
| 16 class GURL; | |
| 17 | |
| 18 namespace url_parse { | |
| 19 struct Parsed; | |
| 20 } | |
| 21 | |
| 22 // TODO(port): this file should deal in string16s rather than wstrings. | |
| 23 namespace gfx { | |
| 24 | |
| 25 // A function to get URL string from a GURL that will be suitable for display | |
| 26 // to the user. The parsing of the URL may change because various parts of the | |
| 27 // string will change lengths. The new parsing will be placed in the given out | |
| 28 // parameter. |prefix_end| is set to the end of the prefix (spec and separator | |
| 29 // characters before host). | |
| 30 // |languages|, |new_parsed|, and |prefix_end| may all be empty or NULL. | |
| 31 std::wstring GetCleanStringFromUrl(const GURL& url, | |
| 32 const std::wstring& languages, | |
| 33 url_parse::Parsed* new_parsed, | |
| 34 size_t* prefix_end); | |
| 35 | |
| 36 // This function takes a GURL object and elides it. It returns a string | |
| 37 // which composed of parts from subdomain, domain, path, filename and query. | |
| 38 // A "..." is added automatically at the end if the elided string is bigger | |
| 39 // than the available pixel width. For available pixel width = 0, empty | |
| 40 // string is returned. |languages| is a comma separted list of ISO 639 | |
| 41 // language codes and is used to determine what characters are understood | |
| 42 // by a user. It should come from |prefs::kAcceptLanguages|. | |
| 43 // | |
| 44 // Note: in RTL locales, if the URL returned by this function is going to be | |
| 45 // displayed in the UI, then it is likely that the string needs to be marked | |
| 46 // as an LTR string (using l10n_util::WrapStringWithLTRFormatting()) so that it | |
| 47 // is displayed properly in an RTL context. Please refer to | |
| 48 // http://crbug.com/6487 for more information. | |
| 49 std::wstring ElideUrl(const GURL& url, | |
| 50 const ChromeFont& font, | |
| 51 int available_pixel_width, | |
| 52 const std::wstring& languages); | |
| 53 | |
| 54 std::wstring ElideText(const std::wstring& text, | |
| 55 const ChromeFont& font, | |
| 56 int available_pixel_width); | |
| 57 | |
| 58 // Elide a filename to fit a given pixel width, with an emphasis on not hiding | |
| 59 // the extension unless we have to. If filename contains a path, the path will | |
| 60 // be removed if filename doesn't fit into available_pixel_width. | |
| 61 std::wstring ElideFilename(const FilePath& filename, | |
| 62 const ChromeFont& font, | |
| 63 int available_pixel_width); | |
| 64 | |
| 65 // SortedDisplayURL maintains a string from a URL suitable for display to the | |
| 66 // use. SortedDisplayURL also provides a function used for comparing two | |
| 67 // SortedDisplayURLs for use in visually ordering the SortedDisplayURLs. | |
| 68 // | |
| 69 // SortedDisplayURL is relatively cheap and supports value semantics. | |
| 70 class SortedDisplayURL { | |
| 71 public: | |
| 72 SortedDisplayURL(const GURL& url, const std::wstring& languages); | |
| 73 SortedDisplayURL() {} | |
| 74 | |
| 75 // Compares this SortedDisplayURL to |url| using |collator|. Returns a value | |
| 76 // < 0, = 1 or > 0 as to whether this url is less then, equal to or greater | |
| 77 // than the supplied url. | |
| 78 int Compare(const SortedDisplayURL& other, Collator* collator) const; | |
| 79 | |
| 80 // Returns the display string for the URL. | |
| 81 const string16& display_url() const { return display_url_; } | |
| 82 | |
| 83 private: | |
| 84 // Returns everything after the host. This is used by Compare if the hosts | |
| 85 // match. | |
| 86 string16 AfterHost() const; | |
| 87 | |
| 88 // Host name minus 'www.'. Used by Compare. | |
| 89 string16 sort_host_; | |
| 90 | |
| 91 // End of the prefix (spec and separator) in display_url_. | |
| 92 size_t prefix_end_; | |
| 93 | |
| 94 string16 display_url_; | |
| 95 }; | |
| 96 | |
| 97 } // namespace gfx. | |
| 98 | |
| 99 #endif // CHROME_COMMON_GFX_TEXT_ELIDER_H_ | |
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