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Migrated text.c.

This commit is contained in:
Pietro Gagliardi 2016-04-21 23:29:44 -04:00
parent 63ce320021
commit dafdaa4de4
5 changed files with 97 additions and 64 deletions
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62
windows/text.c
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@ -1,62 +0,0 @@
// 9 april 2015
#include "uipriv_windows.h"
WCHAR *windowText(HWND hwnd)
{
LRESULT n;
WCHAR *text;
n = SendMessageW(hwnd, WM_GETTEXTLENGTH, 0, 0);
// WM_GETTEXTLENGTH does not include the null terminator
text = (WCHAR *) uiAlloc((n + 1) * sizeof (WCHAR), "WCHAR[]");
// note the comparison: the size includes the null terminator, but the return does not
if (GetWindowTextW(hwnd, text, n + 1) != n)
logLastError("error getting window text in windowText()");
return text;
}
void uiFreeText(char *text)
{
uiFree(text);
}
intmax_t uiWindowsWindowTextWidth(HWND hwnd)
{
LRESULT len;
WCHAR *text;
HDC dc;
HFONT prevfont;
SIZE size;
size.cx = 0;
size.cy = 0;
// first we need the window text
// this copies what windowText() does because we need the len
// we could replace this with a call to windowText() but then we'd also need a call to wcslen() (or some other function that both this and windowText() would call to do the real work)
len = SendMessageW(hwnd, WM_GETTEXTLENGTH, 0, 0);
if (len == 0) // no text; nothing to do
return 0;
text = (WCHAR *) uiAlloc((len + 1) * sizeof (WCHAR), "WCHAR[]");
// note the comparison: the size includes the null terminator, but the return does not
if (GetWindowText(hwnd, text, len + 1) != len)
logLastError("error getting window text in uiWindowsWindowTextWidth()");
// now we can do the calculations
dc = GetDC(hwnd);
if (dc == NULL)
logLastError("error getting DC in uiWindowsWindowTextWidth()");
prevfont = (HFONT) SelectObject(dc, hMessageFont);
if (prevfont == NULL)
logLastError("error loading control font into device context in uiWindowsWindowTextWidth()");
if (GetTextExtentPoint32W(dc, text, len, &size) == 0)
logLastError("error getting text extent point in uiWindowsWindowTextWidth()");
if (SelectObject(dc, prevfont) != hMessageFont)
logLastError("error restoring previous font into device context in uiWindowsWindowTextWidth()");
if (ReleaseDC(hwnd, dc) == 0)
logLastError("error releasing DC in uiWindowsWindowTextWidth()");
uiFree(text);
return size.cx;
}

87
windows/text.cpp Normal file
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@ -0,0 +1,87 @@
// 9 april 2015
#include "uipriv_windows.h"
WCHAR *windowTextAndLen(HWND hwnd, LRESULT *len)
{
LRESULT n;
WCHAR *text;
n = SendMessageW(hwnd, WM_GETTEXTLENGTH, 0, 0);
if (len != NULL)
*len = n;
// WM_GETTEXTLENGTH does not include the null terminator
text = (WCHAR *) uiAlloc((n + 1) * sizeof (WCHAR), "WCHAR[]");
// note the comparison: the size includes the null terminator, but the return does not
if (GetWindowTextW(hwnd, text, n + 1) != n) {
logLastError(L"error getting window text");
// on error, return an empty string to be safe
*text = L'\0';
if (len != NULL)
*len = 0;
}
return text;
}
WCHAR *windowText(HWND hwnd)
{
return windowTextAndLen(hwnd, NULL);
}
void setWindowText(HWND hwnd, WCHAR *wtext)
{
if (SetWindowTextW(hwnd, wtext) == 0)
logLastError(L"error setting window text");
}
void uiFreeText(char *text)
{
uiFree(text);
}
intmax_t uiWindowsWindowTextWidth(HWND hwnd)
{
LRESULT len;
WCHAR *text;
HDC dc;
HFONT prevfont;
SIZE size;
size.cx = 0;
size.cy = 0;
text = windowTextAndLen(hwnd, &len);
if (len == 0) // no text; nothing to do
goto noTextOrError;
// now we can do the calculations
dc = GetDC(hwnd);
if (dc == NULL) {
logLastError(L"error getting DC");
// on any error, assume no text
goto noTextOrError;
}
prevfont = (HFONT) SelectObject(dc, hMessageFont);
if (prevfont == NULL) {
logLastError(L"error loading control font into device context");
ReleaseDC(hwnd, dc);
goto noTextOrError;
}
if (GetTextExtentPoint32W(dc, text, len, &size) == 0) {
logLastError("error getting text extent point");
// continue anyway, assuming size is 0
size.cx = 0;
size.cy = 0;
}
// continue on errors; we got what we want
if (SelectObject(dc, prevfont) != hMessageFont)
logLastError(L"error restoring previous font into device context");
if (ReleaseDC(hwnd, dc) == 0)
logLastError(L"error releasing DC");
uiFree(text);
return size.cx;
noTextOrError:
uiFree(text);
return 0;
}

3
windows/ui_windows_new.h
View File

@ -9,6 +9,9 @@ _UI_EXTERN void uiWindowsEnsureSetParent(HWND hwnd, HWND parent);
// TODO document
_UI_EXTERN void uiWindowsEnsureAssignControlIDZOrder(HWND hwnd, LONG_PTR controlID, HWND insertAfter);
// TODO document
_UI_EXTERN intmax_t uiWindowsWindowTextWidth(HWND hwnd);
// TODO document
_UI_EXTERN void uiWindowsRegisterWM_COMMANDHandler(HWND hwnd, BOOL (*handler)(uiControl *, HWND, WORD, LRESULT *), uiControl *c);
_UI_EXTERN void uiWindowsUnregisterWM_COMMANDHandler(HWND hwnd);

7
windows/uipriv_windows_new.hpp
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@ -7,6 +7,8 @@ extern BOOL runWM_HSCROLL(WPARAM wParam, LPARAM lParam, LRESULT *lResult);
extern void issueWM_WININICHANGE(WPARAM wParam, LPARAM lParam);
// utf16.cpp
#define emptyUTF16() ((WCHAR *) uiAlloc(1 * sizeof (WCHAR), "WCHAR[]"))
#define emptyUTF8() ((char *) uiAlloc(1 * sizeof (char), "char[]"))
extern WCHAR *toUTF16(const char *str);
extern char *toUTF8(const WCHAR *wstr);
extern WCHAR *strf(const WCHAR *format, ...);
@ -35,3 +37,8 @@ extern void setExStyle(HWND hwnd, DWORD exstyle);
extern void clientSizeToWindowSize(HWND hwnd, intmax_t *width, intmax_t *height, BOOL hasMenubar);
extern HWND parentOf(HWND child);
extern HWND parentToplevel(HWND child);
// text.cpp
extern WCHAR *windowTextAndLen(HWND hwnd, LRESULT *len);
extern WCHAR *windowText(HWND hwnd);
extern void setWindowText(HWND hwnd, WCHAR *wtext);

2
windows/utf16.cpp
View File

@ -4,7 +4,6 @@
// see http://stackoverflow.com/a/29556509/3408572
#define MBTWC(str, wstr, bufsiz) MultiByteToWideChar(CP_UTF8, 0, str, -1, wstr, bufsiz)
#define emptyUTF16() ((WCHAR *) uiAlloc(1 * sizeof (WCHAR), "WCHAR[]"))
WCHAR *toUTF16(const char *str)
{
@ -28,7 +27,6 @@ WCHAR *toUTF16(const char *str)
}
#define WCTMB(wstr, str, bufsiz) WideCharToMultiByte(CP_UTF8, 0, wstr, -1, str, bufsiz, NULL, NULL)
#define emptyUTF8() ((char *) uiAlloc(1 * sizeof (char), "char[]"))
char *toUTF8(const WCHAR *wstr)
{