windows-server-2003/windows/core/ntuser/client/edmlonce.c

/****************************************************************************\
* edmlonce.c
*
* Copyright (c) 1985 - 1999, Microsoft Corporation
*
* dec 1990 mikeke from win30
\****************************************************************************/

#include "precomp.h"
#pragma hdrstop

/***************************************************************************\
* MLCreate
*
* Creates the edit control for the window hwnd by allocating memory as
* required from the application's heap. Notifies parent if no memory error
* (after cleaning up if needed). Returns TRUE if no error else return s
* -1.
*
* History:
\***************************************************************************/
LONG MLCreate(
    PED ped,
    LPCREATESTRUCT lpCreateStruct)
{
    LONG windowStyle;
    LPWSTR lpszName;

    /*
     * Get values from the window instance data structure and put them in
     * the ped so that we can access them easier.
     */
    windowStyle = ped->pwnd->style;

    /*
     * Do the standard creation stuff.
     */
    if (!ECCreate(ped, windowStyle)) {
        return -1;
    }

    /*
     * Allocate line start array in local heap and lock it down.
     */
    ped->chLines = (LPICH)UserLocalAlloc(HEAP_ZERO_MEMORY, 2 * sizeof(int));
    if (ped->chLines == NULL) {
        return -1;
    }

    /*
     * Call it one line of text.
     */
    ped->cLines = 1;

    /*
     * If app wants WS_VSCROLL or WS_HSCROLL, it automatically gets
     * AutoVScroll or AutoHScroll.
     */
    if ((windowStyle & ES_AUTOVSCROLL) || (windowStyle & WS_VSCROLL)) {
        ped->fAutoVScroll = 1;
    }

    if (ped->format != ES_LEFT) {
        /*
         * If user wants right or center justified text, then we turn off
         * AUTOHSCROLL and WS_HSCROLL since non-left styles don't make sense
         * otherwise.
         */
        windowStyle &= ~WS_HSCROLL;
        ClearWindowState(ped->pwnd, WFHSCROLL);
        ped->fAutoHScroll = FALSE;
    } else if (windowStyle & WS_HSCROLL) {
        ped->fAutoHScroll = TRUE;
    }

    ped->fWrap = (!ped->fAutoHScroll && !(windowStyle & WS_HSCROLL));

    /*
     * Max # chars we will allow user to enter.
     */
    ped->cchTextMax = MAXTEXT;

    /*
     * Set the default font to be the system font.
     */
    ECSetFont(ped, NULL, FALSE);

    /*
     * Set the window text if needed and notify parent if not enough memory to
     * set the initial text.
     */
    if ((ULONG_PTR)lpCreateStruct->lpszName > gHighestUserAddress) {
        lpszName = REBASEPTR(ped->pwnd, (PVOID)lpCreateStruct->lpszName);
    } else {
        lpszName = (LPWSTR)lpCreateStruct->lpszName;
    }

    if (!ECSetText(ped, (LPSTR)lpszName)) {
        return -1;
    }

    return TRUE;
}