/* INCLUDES ******************************************************************/
#include <windows.h>
+#include <string.h>
#include <user32.h>
#include <debug.h>
/* FUNCTIONS *****************************************************************/
+/*
+ * @unimplemented
+ */
DWORD
STDCALL
GetTabbedTextExtentA(
int nTabPositions,
CONST LPINT lpnTabStopPositions)
{
+ UNIMPLEMENTED;
return 0;
}
+
+/*
+ * @unimplemented
+ */
DWORD
STDCALL
GetTabbedTextExtentW(
int nTabPositions,
CONST LPINT lpnTabStopPositions)
{
+ UNIMPLEMENTED;
return 0;
}
-int
-STDCALL
-DrawTextA(
- HDC hDC,
- LPCSTR lpString,
- int nCount,
- LPRECT lpRect,
- UINT uFormat)
+
+/*********************************************************************
+ *
+ * DrawText functions
+ *
+ * Copied from Wine.
+ * Copyright 1993, 1994 Alexandre Julliard
+ * Copyright 2002 Bill Medland
+ *
+ * Design issues
+ * How many buffers to use
+ * While processing in DrawText there are potentially three different forms
+ * of the text that need to be held. How are they best held?
+ * 1. The original text is needed, of course, to see what to display.
+ * 2. The text that will be returned to the user if the DT_MODIFYSTRING is
+ * in effect.
+ * 3. The buffered text that is about to be displayed e.g. the current line.
+ * Typically this will exclude the ampersands used for prefixing etc.
+ *
+ * Complications.
+ * a. If the buffered text to be displayed includes the ampersands then
+ * we will need special measurement and draw functions that will ignore
+ * the ampersands (e.g. by copying to a buffer without the prefix and
+ * then using the normal forms). This may involve less space but may
+ * require more processing. e.g. since a line containing tabs may
+ * contain several underlined characters either we need to carry around
+ * a list of prefix locations or we may need to locate them several
+ * times.
+ * b. If we actually directly modify the "original text" as we go then we
+ * will need some special "caching" to handle the fact that when we
+ * ellipsify the text the ellipsis may modify the next line of text,
+ * which we have not yet processed. (e.g. ellipsification of a W at the
+ * end of a line will overwrite the W, the \n and the first character of
+ * the next line, and a \0 will overwrite the second. Try it!!)
+ *
+ * Option 1. Three separate storages. (To be implemented)
+ * If DT_MODIFYSTRING is in effect then allocate an extra buffer to hold
+ * the edited string in some form, either as the string itself or as some
+ * sort of "edit list" to be applied just before returning.
+ * Use a buffer that holds the ellipsified current line sans ampersands
+ * and accept the need occasionally to recalculate the prefixes (if
+ * DT_EXPANDTABS and not DT_NOPREFIX and not DT_HIDEPREFIX)
+ */
+
+#define TAB 9
+#define LF 10
+#define CR 13
+#define SPACE 32
+#define PREFIX 38
+
+#define FORWARD_SLASH '/'
+#define BACK_SLASH '\\'
+
+static const WCHAR ELLIPSISW[] = {'.','.','.', 0};
+
+typedef struct tag_ellipsis_data
{
- return 0;
+ int before;
+ int len;
+ int under;
+ int after;
+} ellipsis_data;
+
+/*********************************************************************
+ * TEXT_Ellipsify (static)
+ *
+ * Add an ellipsis to the end of the given string whilst ensuring it fits.
+ *
+ * If the ellipsis alone doesn't fit then it will be returned anyway.
+ *
+ * See Also TEXT_PathEllipsify
+ *
+ * Arguments
+ * hdc [in] The handle to the DC that defines the font.
+ * str [in/out] The string that needs to be modified.
+ * max_str [in] The dimension of str (number of WCHAR).
+ * len_str [in/out] The number of characters in str
+ * width [in] The maximum width permitted (in logical coordinates)
+ * size [out] The dimensions of the text
+ * modstr [out] The modified form of the string, to be returned to the
+ * calling program. It is assumed that the caller has
+ * made sufficient space available so we don't need to
+ * know the size of the space. This pointer may be NULL if
+ * the modified string is not required.
+ * len_before [out] The number of characters before the ellipsis.
+ * len_ellip [out] The number of characters in the ellipsis.
+ *
+ * See for example Microsoft article Q249678.
+ *
+ * For now we will simply use three dots rather than worrying about whether
+ * the font contains an explicit ellipsis character.
+ */
+static void TEXT_Ellipsify (HDC hdc, WCHAR *str, unsigned int max_len,
+ unsigned int *len_str, int width, SIZE *size,
+ WCHAR *modstr,
+ int *len_before, int *len_ellip)
+{
+ unsigned int len_ellipsis;
+ unsigned int lo, mid, hi;
+
+ len_ellipsis = wcslen (ELLIPSISW);
+ if (len_ellipsis > max_len) len_ellipsis = max_len;
+ if (*len_str > max_len - len_ellipsis)
+ *len_str = max_len - len_ellipsis;
+
+ /* First do a quick binary search to get an upper bound for *len_str. */
+ if (*len_str > 0 &&
+ GetTextExtentExPointW(hdc, str, *len_str, width, NULL, NULL, size) &&
+ size->cx > width)
+ {
+ for (lo = 0, hi = *len_str; lo < hi; )
+ {
+ mid = (lo + hi) / 2;
+ if (!GetTextExtentExPointW(hdc, str, mid, width, NULL, NULL, size))
+ break;
+ if (size->cx > width)
+ hi = mid;
+ else
+ lo = mid + 1;
+ }
+ *len_str = hi;
+ }
+ /* Now this should take only a couple iterations at most. */
+ for ( ; ; )
+ {
+ wcsncpy (str + *len_str, ELLIPSISW, len_ellipsis);
+
+ if (!GetTextExtentExPointW (hdc, str, *len_str + len_ellipsis, width,
+ NULL, NULL, size)) break;
+
+ if (!*len_str || size->cx <= width) break;
+
+ (*len_str)--;
+ }
+ *len_ellip = len_ellipsis;
+ *len_before = *len_str;
+ *len_str += len_ellipsis;
+
+ if (modstr)
+ {
+ wcsncpy (modstr, str, *len_str);
+ *(str+*len_str) = '\0';
+ }
}
-int
-STDCALL
-DrawTextExA(
- HDC hdc,
- LPSTR lpchText,
- int cchText,
- LPRECT lprc,
- UINT dwDTFormat,
- LPDRAWTEXTPARAMS lpDTParams)
+/*********************************************************************
+ * TEXT_PathEllipsify (static)
+ *
+ * Add an ellipsis to the provided string in order to make it fit within
+ * the width. The ellipsis is added as specified for the DT_PATH_ELLIPSIS
+ * flag.
+ *
+ * See Also TEXT_Ellipsify
+ *
+ * Arguments
+ * hdc [in] The handle to the DC that defines the font.
+ * str [in/out] The string that needs to be modified
+ * max_str [in] The dimension of str (number of WCHAR).
+ * len_str [in/out] The number of characters in str
+ * width [in] The maximum width permitted (in logical coordinates)
+ * size [out] The dimensions of the text
+ * modstr [out] The modified form of the string, to be returned to the
+ * calling program. It is assumed that the caller has
+ * made sufficient space available so we don't need to
+ * know the size of the space. This pointer may be NULL if
+ * the modified string is not required.
+ * pellip [out] The ellipsification results
+ *
+ * For now we will simply use three dots rather than worrying about whether
+ * the font contains an explicit ellipsis character.
+ *
+ * The following applies, I think to Win95. We will need to extend it for
+ * Win98 which can have both path and end ellipsis at the same time (e.g.
+ * C:\MyLongFileName.Txt becomes ...\MyLongFileN...)
+ *
+ * The resulting string consists of as much as possible of the following:
+ * 1. The ellipsis itself
+ * 2. The last \ or / of the string (if any)
+ * 3. Everything after the last \ or / of the string (if any) or the whole
+ * string if there is no / or \. I believe that under Win95 this would
+ * include everything even though some might be clipped off the end whereas
+ * under Win98 that might be ellipsified too.
+ * Yet to be investigated is whether this would include wordbreaking if the
+ * filename is more than 1 word and splitting if DT_EDITCONTROL was in
+ * effect. (If DT_EDITCONTROL is in effect then on occasions text will be
+ * broken within words).
+ * 4. All the stuff before the / or \, which is placed before the ellipsis.
+ */
+static void TEXT_PathEllipsify (HDC hdc, WCHAR *str, unsigned int max_len,
+ unsigned int *len_str, int width, SIZE *size,
+ WCHAR *modstr, ellipsis_data *pellip)
{
- return 0;
+ unsigned int len_ellipsis;
+ int len_trailing;
+ int len_under;
+ WCHAR *lastBkSlash, *lastFwdSlash, *lastSlash;
+
+ len_ellipsis = wcslen (ELLIPSISW);
+ if (!max_len) return;
+ if (len_ellipsis >= max_len) len_ellipsis = max_len - 1;
+ if (*len_str + len_ellipsis >= max_len)
+ *len_str = max_len - len_ellipsis-1;
+ /* Hopefully this will never happen, otherwise it would probably lose
+ * the wrong character
+ */
+ str[*len_str] = '\0'; /* to simplify things */
+
+ lastBkSlash = wcsrchr (str, BACK_SLASH);
+ lastFwdSlash = wcsrchr (str, FORWARD_SLASH);
+ lastSlash = lastBkSlash > lastFwdSlash ? lastBkSlash : lastFwdSlash;
+ if (!lastSlash) lastSlash = str;
+ len_trailing = *len_str - (lastSlash - str);
+
+ /* overlap-safe movement to the right */
+ memmove (lastSlash+len_ellipsis, lastSlash, len_trailing * sizeof(WCHAR));
+ wcsncpy (lastSlash, ELLIPSISW, len_ellipsis);
+ len_trailing += len_ellipsis;
+ /* From this point on lastSlash actually points to the ellipsis in front
+ * of the last slash and len_trailing includes the ellipsis
+ */
+
+ len_under = 0;
+ for ( ; ; )
+ {
+ if (!GetTextExtentExPointW (hdc, str, *len_str + len_ellipsis, width,
+ NULL, NULL, size)) break;
+
+ if (lastSlash == str || size->cx <= width) break;
+
+ /* overlap-safe movement to the left */
+ memmove (lastSlash-1, lastSlash, len_trailing * sizeof(WCHAR));
+ lastSlash--;
+ len_under++;
+
+ assert (*len_str);
+ (*len_str)--;
+ }
+ pellip->before = lastSlash-str;
+ pellip->len = len_ellipsis;
+ pellip->under = len_under;
+ pellip->after = len_trailing - len_ellipsis;
+ *len_str += len_ellipsis;
+
+ if (modstr)
+ {
+ wcsncpy (modstr, str, *len_str);
+ *(str+*len_str) = '\0';
+ }
}
-int
-STDCALL
-DrawTextExW(
- HDC hdc,
- LPWSTR lpchText,
- int cchText,
- LPRECT lprc,
- UINT dwDTFormat,
- LPDRAWTEXTPARAMS lpDTParams)
+/*********************************************************************
+ * TEXT_WordBreak (static)
+ *
+ * Perform wordbreak processing on the given string
+ *
+ * Assumes that DT_WORDBREAK has been specified and not all the characters
+ * fit. Note that this function should even be called when the first character
+ * that doesn't fit is known to be a space or tab, so that it can swallow them.
+ *
+ * Note that the Windows processing has some strange properties.
+ * 1. If the text is left-justified and there is room for some of the spaces
+ * that follow the last word on the line then those that fit are included on
+ * the line.
+ * 2. If the text is centred or right-justified and there is room for some of
+ * the spaces that follow the last word on the line then all but one of those
+ * that fit are included on the line.
+ * 3. (Reasonable behaviour) If the word breaking causes a space to be the first
+ * character of a new line it will be skipped.
+ *
+ * Arguments
+ * hdc [in] The handle to the DC that defines the font.
+ * str [in/out] The string that needs to be broken.
+ * max_str [in] The dimension of str (number of WCHAR).
+ * len_str [in/out] The number of characters in str
+ * width [in] The maximum width permitted
+ * format [in] The format flags in effect
+ * chars_fit [in] The maximum number of characters of str that are already
+ * known to fit; chars_fit+1 is known not to fit.
+ * chars_used [out] The number of characters of str that have been "used" and
+ * do not need to be included in later text. For example this will
+ * include any spaces that have been discarded from the start of
+ * the next line.
+ * size [out] The size of the returned text in logical coordinates
+ *
+ * Pedantic assumption - Assumes that the text length is monotonically
+ * increasing with number of characters (i.e. no weird kernings)
+ *
+ * Algorithm
+ *
+ * Work back from the last character that did fit to either a space or the last
+ * character of a word, whichever is met first.
+ * If there was one or the first character didn't fit then
+ * If the text is centred or right justified and that one character was a
+ * space then break the line before that character
+ * Otherwise break the line after that character
+ * and if the next character is a space then discard it.
+ * Suppose there was none (and the first character did fit).
+ * If Break Within Word is permitted
+ * break the word after the last character that fits (there must be
+ * at least one; none is caught earlier).
+ * Otherwise
+ * discard any trailing space.
+ * include the whole word; it may be ellipsified later
+ *
+ * Break Within Word is permitted under a set of circumstances that are not
+ * totally clear yet. Currently our best guess is:
+ * If DT_EDITCONTROL is in effect and neither DT_WORD_ELLIPSIS nor
+ * DT_PATH_ELLIPSIS is
+ */
+
+static void TEXT_WordBreak (HDC hdc, WCHAR *str, unsigned int max_str,
+ unsigned int *len_str,
+ int width, int format, unsigned int chars_fit,
+ unsigned int *chars_used, SIZE *size)
{
- return 0;
+ WCHAR *p;
+ int word_fits;
+ assert (format & DT_WORDBREAK);
+ assert (chars_fit < *len_str);
+
+ /* Work back from the last character that did fit to either a space or the
+ * last character of a word, whichever is met first.
+ */
+ p = str + chars_fit; /* The character that doesn't fit */
+ word_fits = TRUE;
+ if (!chars_fit)
+ ; /* we pretend that it fits anyway */
+ else if (*p == SPACE) /* chars_fit < *len_str so this is valid */
+ p--; /* the word just fitted */
+ else
+ {
+ while (p > str && *(--p) != SPACE)
+ ;
+ word_fits = (p != str || *p == SPACE);
+ }
+ /* If there was one or the first character didn't fit then */
+ if (word_fits)
+ {
+ int next_is_space;
+ /* break the line before/after that character */
+ if (!(format & (DT_RIGHT | DT_CENTER)) || *p != SPACE)
+ p++;
+ next_is_space = (unsigned int) (p - str) < *len_str && *p == SPACE;
+ *len_str = p - str;
+ /* and if the next character is a space then discard it. */
+ *chars_used = *len_str;
+ if (next_is_space)
+ (*chars_used)++;
+ }
+ /* Suppose there was none. */
+ else
+ {
+ if ((format & (DT_EDITCONTROL | DT_WORD_ELLIPSIS | DT_PATH_ELLIPSIS)) ==
+ DT_EDITCONTROL)
+ {
+ /* break the word after the last character that fits (there must be
+ * at least one; none is caught earlier).
+ */
+ *len_str = chars_fit;
+ *chars_used = chars_fit;
+
+ /* FIXME - possible error. Since the next character is now removed
+ * this could make the text longer so that it no longer fits, and
+ * so we need a loop to test and shrink.
+ */
+ }
+ /* Otherwise */
+ else
+ {
+ /* discard any trailing space. */
+ const WCHAR *e = str + *len_str;
+ p = str + chars_fit;
+ while (p < e && *p != SPACE)
+ p++;
+ *chars_used = p - str;
+ if (p < e) /* i.e. loop failed because *p == SPACE */
+ (*chars_used)++;
+
+ /* include the whole word; it may be ellipsified later */
+ *len_str = p - str;
+ /* Possible optimisation; if DT_WORD_ELLIPSIS only use chars_fit+1
+ * so that it will be too long
+ */
+ }
+ }
+ /* Remeasure the string */
+ GetTextExtentExPointW (hdc, str, *len_str, 0, NULL, NULL, size);
}
-int
-STDCALL
-DrawTextW(
- HDC hDC,
- LPCWSTR lpString,
- int nCount,
- LPRECT lpRect,
- UINT uFormat)
+/*********************************************************************
+ * TEXT_SkipChars
+ *
+ * Skip over the given number of characters, bearing in mind prefix
+ * substitution and the fact that a character may take more than one
+ * WCHAR (Unicode surrogates are two words long) (and there may have been
+ * a trailing &)
+ *
+ * Parameters
+ * new_count [out] The updated count
+ * new_str [out] The updated pointer
+ * start_count [in] The count of remaining characters corresponding to the
+ * start of the string
+ * start_str [in] The starting point of the string
+ * max [in] The number of characters actually in this segment of the
+ * string (the & counts)
+ * n [in] The number of characters to skip (if prefix then
+ * &c counts as one)
+ * prefix [in] Apply prefix substitution
+ *
+ * Return Values
+ * none
+ *
+ * Remarks
+ * There must be at least n characters in the string
+ * We need max because the "line" may have ended with a & followed by a tab
+ * or newline etc. which we don't want to swallow
+ */
+
+static void TEXT_SkipChars (int *new_count, const WCHAR **new_str,
+ int start_count, const WCHAR *start_str,
+ int max, int n, int prefix)
{
- return 0;
+ /* This is specific to wide characters, MSDN doesn't say anything much
+ * about Unicode surrogates yet and it isn't clear if _wcsinc will
+ * correctly handle them so we'll just do this the easy way for now
+ */
+
+ if (prefix)
+ {
+ const WCHAR *str_on_entry = start_str;
+ assert (max >= n);
+ max -= n;
+ while (n--)
+ if (*start_str++ == PREFIX && max--)
+ start_str++;
+ else;
+ start_count -= (start_str - str_on_entry);
+ }
+ else
+ {
+ start_str += n;
+ start_count -= n;
+ }
+ *new_str = start_str;
+ *new_count = start_count;
+}
+
+/*********************************************************************
+ * TEXT_Reprefix
+ *
+ * Reanalyse the text to find the prefixed character. This is called when
+ * wordbreaking or ellipsification has shortened the string such that the
+ * previously noted prefixed character is no longer visible.
+ *
+ * Parameters
+ * str [in] The original string segment (including all characters)
+ * ns [in] The number of characters in str (including prefixes)
+ * pe [in] The ellipsification data
+ *
+ * Return Values
+ * The prefix offset within the new string segment (the one that contains the
+ * ellipses and does not contain the prefix characters) (-1 if none)
+ */
+
+static int TEXT_Reprefix (const WCHAR *str, unsigned int ns,
+ const ellipsis_data *pe)
+{
+ int result = -1;
+ unsigned int i = 0;
+ unsigned int n = pe->before + pe->under + pe->after;
+ assert (n <= ns);
+ while (i < n)
+ {
+ if (i == (unsigned int) pe->before)
+ {
+ /* Reached the path ellipsis; jump over it */
+ if (ns < (unsigned int) pe->under) break;
+ str += pe->under;
+ ns -= pe->under;
+ i += pe->under;
+ if (!pe->after) break; /* Nothing after the path ellipsis */
+ }
+ if (!ns) break;
+ ns--;
+ if (*str++ == PREFIX)
+ {
+ if (!ns) break;
+ if (*str != PREFIX)
+ result = (i < (unsigned int) pe->before || pe->under == 0) ? i : i - pe->under + pe->len;
+ /* pe->len may be non-zero while pe_under is zero */
+ str++;
+ ns--;
+ }
+ else;
+ i++;
+ }
+ return result;
+}
+
+/*********************************************************************
+ * Returns true if and only if the remainder of the line is a single
+ * newline representation or nothing
+ */
+
+static int remainder_is_none_or_newline (int num_chars, const WCHAR *str)
+{
+ if (!num_chars) return TRUE;
+ if (*str != LF && *str != CR) return FALSE;
+ if (!--num_chars) return TRUE;
+ if (*str == *(str+1)) return FALSE;
+ str++;
+ if (*str != CR && *str != LF) return FALSE;
+ if (--num_chars) return FALSE;
+ return TRUE;
+}
+
+/*********************************************************************
+ * Return next line of text from a string.
+ *
+ * hdc - handle to DC.
+ * str - string to parse into lines.
+ * count - length of str.
+ * dest - destination in which to return line.
+ * len - dest buffer size in chars on input, copied length into dest on output.
+ * width - maximum width of line in pixels.
+ * format - format type passed to DrawText.
+ * retsize - returned size of the line in pixels.
+ * last_line - TRUE if is the last line that will be processed
+ * p_retstr - If DT_MODIFYSTRING this points to a cursor in the buffer in which
+ * the return string is built.
+ * tabwidth - The width of a tab in logical coordinates
+ * pprefix_offset - Here is where we return the offset within dest of the first
+ * prefixed (underlined) character. -1 is returned if there
+ * are none. Note that there may be more; the calling code
+ * will need to use TEXT_Reprefix to find any later ones.
+ * pellip - Here is where we return the information about any ellipsification
+ * that was carried out. Note that if tabs are being expanded then
+ * this data will correspond to the last text segment actually
+ * returned in dest; by definition there would not have been any
+ * ellipsification in earlier text segments of the line.
+ *
+ * Returns pointer to next char in str after end of the line
+ * or NULL if end of str reached.
+ */
+static const WCHAR *TEXT_NextLineW( HDC hdc, const WCHAR *str, int *count,
+ WCHAR *dest, int *len, int width, DWORD format,
+ SIZE *retsize, int last_line, WCHAR **p_retstr,
+ int tabwidth, int *pprefix_offset,
+ ellipsis_data *pellip)
+{
+ int i = 0, j = 0;
+ int plen = 0;
+ SIZE size;
+ int maxl = *len;
+ int seg_i, seg_count, seg_j;
+ int max_seg_width;
+ int num_fit;
+ int word_broken;
+ int line_fits;
+ int j_in_seg;
+ int ellipsified;
+ *pprefix_offset = -1;
+
+ /* For each text segment in the line */
+
+ retsize->cy = 0;
+ while (*count)
+ {
+
+ /* Skip any leading tabs */
+
+ if (str[i] == TAB && (format & DT_EXPANDTABS))
+ {
+ plen = ((plen/tabwidth)+1)*tabwidth;
+ (*count)--; if (j < maxl) dest[j++] = str[i++]; else i++;
+ while (*count && str[i] == TAB)
+ {
+ plen += tabwidth;
+ (*count)--; if (j < maxl) dest[j++] = str[i++]; else i++;
+ }
+ }
+
+
+ /* Now copy as far as the next tab or cr/lf or eos */
+
+ seg_i = i;
+ seg_count = *count;
+ seg_j = j;
+
+ while (*count &&
+ (str[i] != TAB || !(format & DT_EXPANDTABS)) &&
+ ((str[i] != CR && str[i] != LF) || (format & DT_SINGLELINE)))
+ {
+ if (str[i] == PREFIX && !(format & DT_NOPREFIX) && *count > 1)
+ {
+ (*count)--, i++; /* Throw away the prefix itself */
+ if (str[i] == PREFIX)
+ {
+ /* Swallow it before we see it again */
+ (*count)--; if (j < maxl) dest[j++] = str[i++]; else i++;
+ }
+ else if (*pprefix_offset == -1 || *pprefix_offset >= seg_j)
+ {
+ *pprefix_offset = j;
+ }
+ /* else the previous prefix was in an earlier segment of the
+ * line; we will leave it to the drawing code to catch this
+ * one.
+ */
+ }
+ else
+ {
+ (*count)--; if (j < maxl) dest[j++] = str[i++]; else i++;
+ }
+ }
+
+
+ /* Measure the whole text segment and possibly WordBreak and
+ * ellipsify it
+ */
+
+ j_in_seg = j - seg_j;
+ max_seg_width = width - plen;
+ GetTextExtentExPointW (hdc, dest + seg_j, j_in_seg, max_seg_width, &num_fit, NULL, &size);
+
+ /* The Microsoft handling of various combinations of formats is weird.
+ * The following may very easily be incorrect if several formats are
+ * combined, and may differ between versions (to say nothing of the
+ * several bugs in the Microsoft versions).
+ */
+ word_broken = 0;
+ line_fits = (num_fit >= j_in_seg);
+ if (!line_fits && (format & DT_WORDBREAK))
+ {
+ const WCHAR *s;
+ int chars_used;
+ TEXT_WordBreak (hdc, dest+seg_j, maxl-seg_j, &j_in_seg,
+ max_seg_width, format, num_fit, &chars_used, &size);
+ line_fits = (size.cx <= max_seg_width);
+ /* and correct the counts */
+ TEXT_SkipChars (count, &s, seg_count, str+seg_i, i-seg_i,
+ chars_used, !(format & DT_NOPREFIX));
+ i = s - str;
+ word_broken = 1;
+ }
+ pellip->before = j_in_seg;
+ pellip->under = 0;
+ pellip->after = 0;
+ pellip->len = 0;
+ ellipsified = 0;
+ if (!line_fits && (format & DT_PATH_ELLIPSIS))
+ {
+ TEXT_PathEllipsify (hdc, dest + seg_j, maxl-seg_j, &j_in_seg,
+ max_seg_width, &size, *p_retstr, pellip);
+ line_fits = (size.cx <= max_seg_width);
+ ellipsified = 1;
+ }
+ /* NB we may end up ellipsifying a word-broken or path_ellipsified
+ * string */
+ if ((!line_fits && (format & DT_WORD_ELLIPSIS)) ||
+ ((format & DT_END_ELLIPSIS) &&
+ ((last_line && *count) ||
+ (remainder_is_none_or_newline (*count, &str[i]) && !line_fits))))
+ {
+ int before, len_ellipsis;
+ TEXT_Ellipsify (hdc, dest + seg_j, maxl-seg_j, &j_in_seg,
+ max_seg_width, &size, *p_retstr, &before, &len_ellipsis);
+ if (before > pellip->before)
+ {
+ /* We must have done a path ellipsis too */
+ pellip->after = before - pellip->before - pellip->len;
+ /* Leave the len as the length of the first ellipsis */
+ }
+ else
+ {
+ /* If we are here after a path ellipsification it must be
+ * because even the ellipsis itself didn't fit.
+ */
+ assert (pellip->under == 0 && pellip->after == 0);
+ pellip->before = before;
+ pellip->len = len_ellipsis;
+ /* pellip->after remains as zero as does
+ * pellip->under
+ */
+ }
+ line_fits = (size.cx <= max_seg_width);
+ ellipsified = 1;
+ }
+ /* As an optimisation if we have ellipsified and we are expanding
+ * tabs and we haven't reached the end of the line we can skip to it
+ * now rather than going around the loop again.
+ */
+ if ((format & DT_EXPANDTABS) && ellipsified)
+ {
+ if (format & DT_SINGLELINE)
+ *count = 0;
+ else
+ {
+ while ((*count) && str[i] != CR && str[i] != LF)
+ {
+ (*count)--, i++;
+ }
+ }
+ }
+
+ j = seg_j + j_in_seg;
+ if (*pprefix_offset >= seg_j + pellip->before)
+ {
+ *pprefix_offset = TEXT_Reprefix (str + seg_i, i - seg_i, pellip);
+ if (*pprefix_offset != -1)
+ *pprefix_offset += seg_j;
+ }
+
+ plen += size.cx;
+ if (size.cy > retsize->cy)
+ retsize->cy = size.cy;
+
+ if (word_broken)
+ break;
+ else if (!*count)
+ break;
+ else if (str[i] == CR || str[i] == LF)
+ {
+ (*count)--, i++;
+ if (*count && (str[i] == CR || str[i] == LF) && str[i] != str[i-1])
+ {
+ (*count)--, i++;
+ }
+ break;
+ }
+ /* else it was a Tab and we go around again */
+ }
+
+ retsize->cx = plen;
+ *len = j;
+ if (*count)
+ return (&str[i]);
+ else
+ return NULL;
+}
+
+
+/***********************************************************************
+ * TEXT_DrawUnderscore
+ *
+ * Draw the underline under the prefixed character
+ *
+ * Parameters
+ * hdc [in] The handle of the DC for drawing
+ * x [in] The x location of the line segment (logical coordinates)
+ * y [in] The y location of where the underscore should appear
+ * (logical coordinates)
+ * str [in] The text of the line segment
+ * offset [in] The offset of the underscored character within str
+ */
+
+static void TEXT_DrawUnderscore (HDC hdc, int x, int y, const WCHAR *str, int offset)
+{
+ int prefix_x;
+ int prefix_end;
+ SIZE size;
+ HPEN hpen;
+ HPEN oldPen;
+
+ GetTextExtentPointW (hdc, str, offset, &size);
+ prefix_x = x + size.cx;
+ GetTextExtentPointW (hdc, str, offset+1, &size);
+ prefix_end = x + size.cx - 1;
+ /* The above method may eventually be slightly wrong due to kerning etc. */
+
+ hpen = CreatePen (PS_SOLID, 1, GetTextColor (hdc));
+ oldPen = SelectObject (hdc, hpen);
+ MoveToEx (hdc, prefix_x, y, NULL);
+ LineTo (hdc, prefix_end, y);
+ SelectObject (hdc, oldPen);
+ DeleteObject (hpen);
+}
+
+/***********************************************************************
+ * DrawTextExW (USER32.@)
+ *
+ * The documentation on the extra space required for DT_MODIFYSTRING at MSDN
+ * is not quite complete, especially with regard to \0. We will assume that
+ * the returned string could have a length of up to i_count+3 and also have
+ * a trailing \0 (which would be 4 more than a not-null-terminated string but
+ * 3 more than a null-terminated string). If this is not so then increase
+ * the allowance in DrawTextExA.
+ */
+#define MAX_STATIC_BUFFER 1024
+/*
+ * @implemented
+ */
+int STDCALL
+DrawTextExW( HDC hdc, LPWSTR str, INT i_count,
+ LPRECT rect, UINT flags, LPDRAWTEXTPARAMS dtp )
+{
+ SIZE size;
+ const WCHAR *strPtr;
+ WCHAR *retstr, *p_retstr;
+ size_t size_retstr;
+ static WCHAR line[MAX_STATIC_BUFFER];
+ int len, lh, count=i_count;
+ TEXTMETRICW tm;
+ int lmargin = 0, rmargin = 0;
+ int x = rect->left, y = rect->top;
+ int width = rect->right - rect->left;
+ int max_width = 0;
+ int last_line;
+ int tabwidth /* to keep gcc happy */ = 0;
+ int prefix_offset;
+ ellipsis_data ellip;
+
+#if 0
+ TRACE("%s, %d , [(%d,%d),(%d,%d)]\n", debugstr_wn (str, count), count,
+ rect->left, rect->top, rect->right, rect->bottom);
+
+ if (dtp) TRACE("Params: iTabLength=%d, iLeftMargin=%d, iRightMargin=%d\n",
+ dtp->iTabLength, dtp->iLeftMargin, dtp->iRightMargin);
+#endif
+
+ if (!str) return 0;
+ if (count == -1) count = wcslen(str);
+ if (count == 0) return 0;
+ strPtr = str;
+
+ if (flags & DT_SINGLELINE)
+ flags &= ~DT_WORDBREAK;
+
+ GetTextMetricsW(hdc, &tm);
+ if (flags & DT_EXTERNALLEADING)
+ lh = tm.tmHeight + tm.tmExternalLeading;
+ else
+ lh = tm.tmHeight;
+
+ if (dtp)
+ {
+ lmargin = dtp->iLeftMargin * tm.tmAveCharWidth;
+ rmargin = dtp->iRightMargin * tm.tmAveCharWidth;
+ if (!(flags & (DT_CENTER | DT_RIGHT)))
+ x += lmargin;
+ dtp->uiLengthDrawn = 0; /* This param RECEIVES number of chars processed */
+ }
+
+ if (flags & DT_EXPANDTABS)
+ {
+ int tabstop = ((flags & DT_TABSTOP) && dtp) ? dtp->iTabLength : 8;
+ tabwidth = tm.tmAveCharWidth * tabstop;
+ }
+
+ if (flags & DT_CALCRECT) flags |= DT_NOCLIP;
+
+ if (flags & DT_MODIFYSTRING)
+ {
+ size_retstr = (count + 4) * sizeof (WCHAR);
+ retstr = HeapAlloc(GetProcessHeap(), 0, size_retstr);
+ if (!retstr) return 0;
+ memcpy (retstr, str, size_retstr);
+ }
+ else
+ {
+ size_retstr = 0;
+ retstr = NULL;
+ }
+ p_retstr = retstr;
+
+ do
+ {
+ len = MAX_STATIC_BUFFER;
+ last_line = !(flags & DT_NOCLIP) && y + ((flags & DT_EDITCONTROL) ? 2*lh-1 : lh) > rect->bottom;
+ strPtr = TEXT_NextLineW(hdc, strPtr, &count, line, &len, width, flags, &size, last_line, &p_retstr, tabwidth, &prefix_offset, &ellip);
+
+ if (flags & DT_CENTER) x = (rect->left + rect->right -
+ size.cx) / 2;
+ else if (flags & DT_RIGHT) x = rect->right - size.cx;
+
+ if (flags & DT_SINGLELINE)
+ {
+ if (flags & DT_VCENTER) y = rect->top +
+ (rect->bottom - rect->top) / 2 - size.cy / 2;
+ else if (flags & DT_BOTTOM) y = rect->bottom - size.cy;
+ }
+
+ if (!(flags & DT_CALCRECT))
+ {
+ const WCHAR *str = line;
+ int xseg = x;
+ while (len)
+ {
+ int len_seg;
+ SIZE size;
+ if ((flags & DT_EXPANDTABS))
+ {
+ const WCHAR *p;
+ p = str; while (p < str+len && *p != TAB) p++;
+ len_seg = p - str;
+ if (len_seg != len && !GetTextExtentPointW(hdc, str, len_seg, &size))
+ return 0;
+ }
+ else
+ len_seg = len;
+
+ if (!ExtTextOutW( hdc, xseg, y,
+ ((flags & DT_NOCLIP) ? 0 : ETO_CLIPPED) |
+ ((flags & DT_RTLREADING) ? ETO_RTLREADING : 0),
+ rect, str, len_seg, NULL )) return 0;
+ if (prefix_offset != -1 && prefix_offset < len_seg)
+ {
+ TEXT_DrawUnderscore (hdc, xseg, y + tm.tmAscent + 1, str, prefix_offset);
+ }
+ len -= len_seg;
+ str += len_seg;
+ if (len)
+ {
+ assert ((flags & DT_EXPANDTABS) && *str == TAB);
+ len--; str++;
+ xseg += ((size.cx/tabwidth)+1)*tabwidth;
+ if (prefix_offset != -1)
+ {
+ if (prefix_offset < len_seg)
+ {
+ /* We have just drawn an underscore; we ought to
+ * figure out where the next one is. I am going
+ * to leave it for now until I have a better model
+ * for the line, which will make reprefixing easier.
+ * This is where ellip would be used.
+ */
+ prefix_offset = -1;
+ }
+ else
+ prefix_offset -= len_seg;
+ }
+ }
+ }
+ }
+ else if (size.cx > max_width)
+ max_width = size.cx;
+
+ y += lh;
+ if (dtp)
+ dtp->uiLengthDrawn += len;
+ }
+ while (strPtr && !last_line);
+
+ if (flags & DT_CALCRECT)
+ {
+ rect->right = rect->left + max_width;
+ rect->bottom = y;
+ if (dtp)
+ rect->right += lmargin + rmargin;
+ }
+ if (retstr)
+ {
+ memcpy (str, retstr, size_retstr);
+ HeapFree (GetProcessHeap(), 0, retstr);
+ }
+ return y - rect->top;
+}
+
+/***********************************************************************
+ * DrawTextExA (USER32.@)
+ *
+ * If DT_MODIFYSTRING is specified then there must be room for up to
+ * 4 extra characters. We take great care about just how much modified
+ * string we return.
+ *
+ * @unimplemented
+ */
+int STDCALL
+DrawTextExA( HDC hdc, LPSTR str, INT count,
+ LPRECT rect, UINT flags, LPDRAWTEXTPARAMS dtp )
+{
+ WCHAR *wstr;
+ WCHAR *p;
+ INT ret = 0;
+ int i;
+ DWORD wcount;
+ DWORD wmax;
+ DWORD amax;
+
+ if (!str) return 0;
+ if (count == -1) count = strlen(str);
+ if (!count) return 0;
+ wcount = MultiByteToWideChar( CP_ACP, 0, str, count, NULL, 0 );
+ wmax = wcount;
+ amax = count;
+ if (flags & DT_MODIFYSTRING)
+ {
+ wmax += 4;
+ amax += 4;
+ }
+ wstr = HeapAlloc(GetProcessHeap(), 0, wmax * sizeof(WCHAR));
+ if (wstr)
+ {
+ MultiByteToWideChar( CP_ACP, 0, str, count, wstr, wcount );
+ if (flags & DT_MODIFYSTRING)
+ for (i=4, p=wstr+wcount; i--; p++) *p=0xFFFE;
+ /* Initialise the extra characters so that we can see which ones
+ * change. U+FFFE is guaranteed to be not a unicode character and
+ * so will not be generated by DrawTextEx itself.
+ */
+ ret = DrawTextExW( hdc, wstr, wcount, rect, flags, NULL );
+ if (flags & DT_MODIFYSTRING)
+ {
+ /* Unfortunately the returned string may contain multiple \0s
+ * and so we need to measure it ourselves.
+ */
+ for (i=4, p=wstr+wcount; i-- && *p != 0xFFFE; p++) wcount++;
+ WideCharToMultiByte( CP_ACP, 0, wstr, wcount, str, amax, NULL, NULL );
+ }
+ HeapFree(GetProcessHeap(), 0, wstr);
+ }
+ return ret;
+}
+
+/***********************************************************************
+ * DrawTextW (USER32.@)
+ *
+ * @implemented
+ */
+int STDCALL
+DrawTextW( HDC hdc, LPCWSTR str, INT count, LPRECT rect, UINT flags )
+{
+ DRAWTEXTPARAMS dtp;
+
+ memset (&dtp, 0, sizeof(dtp));
+ if (flags & DT_TABSTOP)
+ {
+ dtp.iTabLength = (flags >> 8) && 0xff;
+ flags &= 0xffff00ff;
+ }
+ return DrawTextExW(hdc, (LPWSTR)str, count, rect, flags, &dtp);
+}
+
+/***********************************************************************
+ * DrawTextA (USER32.@)
+ *
+ * @implemented
+ */
+int STDCALL
+DrawTextA( HDC hdc, LPCSTR str, INT count, LPRECT rect, UINT flags )
+{
+ DRAWTEXTPARAMS dtp;
+
+ memset (&dtp, 0, sizeof(dtp));
+ if (flags & DT_TABSTOP)
+ {
+ dtp.iTabLength = (flags >> 8) && 0xff;
+ flags &= 0xffff00ff;
+ }
+ return DrawTextExA( hdc, (LPSTR)str, count, rect, flags, &dtp );
}
git://git.jankratochvil.net / reactos.git / blobdiff