medit.c

在ｅｃｏｓ 下mingui 的移植开发

					// added by leon to optimize display
					// added by leon for scrollbars
					edtSetScrollInfo (hWnd, pMLEditData, TRUE);
	   	   		  	// added by leon for scrollbars
				}
				break;
                case SCANCODE_INSERT:
                    pMLEditData->status ^= EST_REPLACE;
                break;

                case SCANCODE_REMOVE:
				{
					PLINEDATA temp;
					int leftLen;

					pLineData = GetLineData(pMLEditData, pMLEditData->editLine);
                    if ((pMLEditData->status & EST_READONLY) ){
                        Ping ();
                        return 0;
                    }
                   	temp = pLineData->next; 
					if (pMLEditData->veditPos == pMLEditData->fit_chars && temp)
					{
						if(pLineData->dataEnd + temp->dataEnd <= LEN_MLEDIT_BUFFER)
						{
							memcpy(pLineData->buffer+pLineData->dataEnd,temp->buffer,temp->dataEnd);	
							pLineData->dataEnd += temp->dataEnd;
							pLineData->buffer[pLineData->dataEnd] = '\0';
							if(temp->next)
							{
							    pLineData->next = temp->next;
								temp->next->previous = pLineData;	
							}
							else
								pLineData->next = NULL;
							free(temp);
							temp = pLineData->next;
							while (temp)
							{
								temp->lineNO--;
								temp = temp->next;
							}
							edtGetLineInfo (hWnd, pLineData);
					
							if(pMLEditData->EndlineDisp >= pMLEditData->lines-1)		
							{
							// added by leon to optimize display
							if ((pMLEditData->EndlineDisp == pMLEditData->lines -1) 
										&& (pMLEditData->StartlineDisp != 0)) {
								InvRect.bottom = (pMLEditData->editLine - pMLEditData->StartlineDisp + 1) 
													* GetSysCharHeight() + pMLEditData->topMargin;
							}else {
								InvRect.top = (pMLEditData->editLine - pMLEditData->StartlineDisp) * GetSysCharHeight()
			        	       		            + pMLEditData->topMargin;
							}
							// added by leon to optimize display
								if(pMLEditData->StartlineDisp !=0)
								{
									pMLEditData->StartlineDisp--;
									pMLEditData->EndlineDisp =min( pMLEditData->lines-1,
										pMLEditData->StartlineDisp+pMLEditData->MaxlinesDisp -1);
									pMLEditData->linesDisp = pMLEditData->EndlineDisp -
										pMLEditData->StartlineDisp +1; 
								}
								else
								{
									pMLEditData->EndlineDisp--;
									pMLEditData->linesDisp = pMLEditData->EndlineDisp -
												pMLEditData->StartlineDisp+1;
								}
							}
							else if (pMLEditData->lines <= pMLEditData->MaxlinesDisp)
							{
								pMLEditData->EndlineDisp--;
								pMLEditData->linesDisp = pMLEditData->EndlineDisp -
												pMLEditData->StartlineDisp+1;
							}
							pMLEditData->lines--;
						}
						else if (temp->dataEnd > 0)
						{
							leftLen = LEN_MLEDIT_BUFFER - pLineData->dataEnd;
							memcpy(pLineData->buffer+pLineData->dataEnd,temp->buffer,leftLen);
							pLineData->dataEnd +=leftLen;
							pLineData->buffer[pLineData->dataEnd] = '\0';
							memcpy(temp->buffer,temp->buffer+leftLen,temp->dataEnd-leftLen);  
							temp->dataEnd -=leftLen;
							temp->buffer[temp->dataEnd] = '\0';
							// added by leon to optimize display
							InvRect.top = (pMLEditData->editLine - pMLEditData->StartlineDisp) * GetSysCharHeight()
			                	            + pMLEditData->topMargin;
							// added by leon to optimize display
						}
					}
					else if (pMLEditData->veditPos != pMLEditData->fit_chars)
					{	
						edtGetLineInfo (hWnd, GetLineData (pMLEditData, pMLEditData->editLine));
					//fprintf (stderr, "veditPos = %d\n", pMLEditData->veditPos);
					//fprintf (stderr, "fit_chars= %d\n", pMLEditData->fit_chars);
					//fprintf (stderr, "buffer = %s\n", pLineData->buffer);
					//fprintf (stderr, "dataEnd= %d\n", pLineData->dataEnd);
					//fprintf (stderr, "buffer left = %s\n", pLineData->buffer
					//				+ pMLEditData->dx_chars[pMLEditData->veditPos]);

						deleted = pMLEditData->pos_chars[pMLEditData->veditPos + 1]
									- pMLEditData->pos_chars[pMLEditData->veditPos];
					//fprintf (stderr, "deleted = %d\n", deleted);

            	        for (i = pMLEditData->pos_chars[pMLEditData->veditPos]; 
                	            i < pLineData->dataEnd - deleted;
                    	        i++)
 	                       pLineData->buffer [i] 
    	                        = pLineData->buffer [i + deleted];

        	            pLineData->dataEnd -= deleted;
						if (pLineData->dataEnd == 0) {
							pMLEditData->fit_chars = 0;
							pMLEditData->pos_chars[0] = 0;
							pMLEditData->dx_chars[0] = 0;
						}
						pLineData->buffer[pLineData->dataEnd] = '\0';
					//fprintf (stderr, "buffer = %s\n", pLineData->buffer);
					//fprintf (stderr, "dataEnd= %d\n", pLineData->dataEnd);
					// added by leon to optimize display
						// only current line to redraw
					//fprintf (stderr, "dx= %d\n", pMLEditData->dx_chars[pMLEditData->veditPos]);
						if (pMLEditData->EndlineDisp <= pMLEditData->lines - 1) {
							InvRect.left = pMLEditData->dx_chars[pMLEditData->veditPos] 
											- pMLEditData->dx_chars[pMLEditData->vdispPos]
        	          		          		+ pMLEditData->leftMargin; 
							InvRect.top = (pMLEditData->editLine - pMLEditData->StartlineDisp) 
											* GetSysCharHeight()//Mneeded
		        	        	            + pMLEditData->topMargin;
							InvRect.bottom = InvRect.top + GetSysCharWidth () * 2;
						}
					//fprintf (stderr, "left= %d\n",pMLEditData->dx_chars[pMLEditData->vdispPos]);
					}
					else {
						InvRect.left = InvRect.top = InvRect.right = InvRect.bottom = 0;
						Ping ();
					}
					// added by leon to optimize display
                	
					edtGetLineInfo (hWnd, GetLineData (pMLEditData, pMLEditData->editLine));
					bChange = TRUE;
					edtSetCaretPos (hWnd);
					InvalidateRect (hWnd, &InvRect,FALSE); // modified by leon to display
					// added by leon for scrollbars
					edtSetScrollInfo (hWnd, pMLEditData, TRUE);
	   	   		  	// added by leon for scrollbars
				}
                break;

                case SCANCODE_BACKSPACE:
				{
					PLINEDATA temp;
					int leftLen,tempEnd;
                    if ((pMLEditData->status & EST_READONLY) ){
                        Ping ();
                        return 0;
                    }
					GetClientRect (hWnd, &InvRect);
					
					pLineData = GetLineData(pMLEditData,pMLEditData->editLine);
					temp = pLineData->previous;	
					//the caret is at the head of current line
					if (pMLEditData->veditPos == 0 && temp)
					{
						tempEnd = temp->dataEnd;
						edtGetLineInfo (hWnd, temp);
						if ( pMLEditData->sz.cx < edtGetOutWidth (hWnd)) { 
							if ( pMLEditData->lines - 1 != pMLEditData->EndlineDisp) {
								//partly redraw
								InvRect.top = (pMLEditData->editLine - 
												pMLEditData->StartlineDisp - 1 )
							   				* GetSysCharHeight() //Mneeded
			               	            	+ pMLEditData->topMargin;
							}else {
								InvRect.bottom =(pMLEditData->editLine - 
												pMLEditData->StartlineDisp + 1)
							   				* GetSysCharHeight() //Mneeded
			               	            	+ pMLEditData->topMargin;
							}
						}
						// added by leon to optimize display
								
						if(pLineData->dataEnd + temp->dataEnd <= LEN_MLEDIT_BUFFER)	
						{
							edtGetLineInfo (hWnd, temp);
							pMLEditData->veditPos = pMLEditData->fit_chars;
							memcpy(temp->buffer+temp->dataEnd,pLineData->buffer,pLineData->dataEnd);	
							temp->dataEnd +=pLineData->dataEnd;
							temp->buffer[temp->dataEnd] = '\0';
							if(pLineData->next)
							{
							    temp->next = pLineData->next;
								pLineData->next->previous = temp;
							}
							else
								temp->next = NULL;
							free(pLineData);
							pLineData = temp;
							temp = temp->next;
							while(temp)
							{
								temp->lineNO--;
								temp = temp->next;
							}
							pMLEditData->lines--;
							if (pMLEditData->StartlineDisp == pMLEditData->editLine
									&& pMLEditData->StartlineDisp != 0)
							{
                                pMLEditData->StartlineDisp--;
								if(pMLEditData->EndlineDisp >= pMLEditData->lines - 1 )
                                {
								    pMLEditData->EndlineDisp = min(pMLEditData->lines - 1,
									   pMLEditData->MaxlinesDisp + pMLEditData->StartlineDisp - 1 );
									pMLEditData->linesDisp = pMLEditData->EndlineDisp
													- pMLEditData->StartlineDisp + 1;	
								}
								else 
								{
									pMLEditData->EndlineDisp--;
									pMLEditData->linesDisp = pMLEditData->EndlineDisp -
												pMLEditData->StartlineDisp + 1;
								}
                            }
							else if ( pMLEditData->EndlineDisp >= pMLEditData->lines - 1
									&& pMLEditData->editLine != pMLEditData->StartlineDisp )
							{
								if( pMLEditData->StartlineDisp != 0)
								{
									pMLEditData->StartlineDisp--;	
									if(pMLEditData->EndlineDisp >= pMLEditData->lines -1)
									{
										pMLEditData->EndlineDisp--;
										pMLEditData->linesDisp = pMLEditData->EndlineDisp -
												pMLEditData->StartlineDisp + 1;
									}
								}
							    else 
								{
									pMLEditData->EndlineDisp--;
									pMLEditData->linesDisp = pMLEditData->EndlineDisp -
												pMLEditData->StartlineDisp + 1;
								}
							}
							pMLEditData->editLine--;
						}
						else if (pLineData->dataEnd > 0)
						{
							edtGetLineInfo (hWnd, temp);
							pMLEditData->veditPos = pMLEditData->fit_chars;
							leftLen = LEN_MLEDIT_BUFFER - temp->dataEnd;
							memcpy(temp->buffer+temp->dataEnd,pLineData->buffer,leftLen);
							temp->dataEnd +=leftLen;
							temp->buffer[temp->dataEnd] = '\0';
							memcpy(pLineData->buffer,pLineData->buffer+leftLen,pLineData->dataEnd-leftLen);  
							pLineData->dataEnd -=leftLen;
							pLineData->buffer[pLineData->dataEnd] = '\0';
						}
						// added by leon to fix the 'roll window' bug
						if (pMLEditData->veditPos > edtGetStartDispPosAtEnd(hWnd,pLineData))
							pMLEditData->vdispPos = edtGetStartDispPosAtEnd(hWnd,pLineData);
						else {
							if (edtGetNewvPos (hWnd,
												GetLineData(pMLEditData,pMLEditData->editLine),
												pMLEditData->dx_chars[pMLEditData->veditPos] 
												- edtGetOutWidth (hWnd)/4) == -1)
								pMLEditData->vdispPos = 0;
							else
								pMLEditData->vdispPos = edtGetNewvPos (hWnd,
												GetLineData(pMLEditData,pMLEditData->editLine),
												pMLEditData->dx_chars[pMLEditData->veditPos] 
												- edtGetOutWidth (hWnd)/4);
						}
						// added by leon to fix the 'roll window' bug
						
           		        if (pMLEditData->vdispPos == pMLEditData->veditPos 
                	            && pMLEditData->veditPos != 0) {
							if (edtGetNewvPos (hWnd,
												GetLineData(pMLEditData,pMLEditData->editLine),
												pMLEditData->dx_chars[pMLEditData->veditPos] 
												- edtGetOutWidth (hWnd)/4) == -1)
								pMLEditData->vdispPos = 0;
							else
								pMLEditData->vdispPos = edtGetNewvPos (hWnd,
												GetLineData(pMLEditData,pMLEditData->editLine),
												pMLEditData->dx_chars[pMLEditData->veditPos] 
												- edtGetOutWidth (hWnd)/4);
                   	 	}
					}
					// not the head
					else if (pMLEditData->veditPos != 0 )
					{
						deleted = pMLEditData->pos_chars[pMLEditData->veditPos] 
									- pMLEditData->pos_chars[pMLEditData->veditPos - 1];
    	                for (i = pMLEditData->pos_chars[pMLEditData->veditPos]; 
        	                    i < pLineData->dataEnd;
            	                i++)
                	        pLineData->buffer [i - deleted] 
                    	        = pLineData->buffer [i];

  	    	            pLineData->dataEnd -= deleted;
    	                pMLEditData->veditPos -= 1;
                	    //pMLEditData->caretPos -= deleted;
						pLineData->buffer[pLineData->dataEnd] = '\0';
	                    if (pMLEditData->vdispPos == pMLEditData->veditPos) {
							if (edtGetNewvPos (hWnd,
												GetLineData(pMLEditData,pMLEditData->editLine),
												pMLEditData->dx_chars[pMLEditData->veditPos] 
												- edtGetOutWidth (hWnd)/4) == -1)
								pMLEditData->vdispPos = 0;
							else
								pMLEditData->vdispPos = edtGetNewvPos (hWnd,
												GetLineData(pMLEditData,pMLEditData->editLine),
												pMLEditData->dx_chars[pMLEditData->veditPos] 
												- edtGetOutWidth (hWnd)/4);
                	    }else {
							InvRect.left = pMLEditData->dx_chars[pMLEditData->veditPos]
								   			- pMLEditData->dx_chars[pMLEditData->vdispPos]	
                  		    	      		+ pMLEditData->leftMargin; 
							InvRect.top = (pMLEditData->editLine - pMLEditData->StartlineDisp)
								   			* GetSysCharHeight()
		                		            + pMLEditData->topMargin;
							InvRect.bottom = InvRect.top + GetSysCharWidth ()*2;

						}
					}
					// added by leon to optimize display
					else {
						InvRect.left = InvRect.top = InvRect.right = InvRect.bottom = 0;
						Ping ();
					}
					// added by leon to optimize display
					
            	    bChange = TRUE;
					edtSetCaretPos (hWnd);
                    InvalidateRect (hWnd, &InvRect, FALSE);// modified by leon
					// added by leon for scrollbars
					edtSetScrollInfo (hWnd, pMLEditData, TRUE);
	   	   		  	// added by leon for scrollbars
				}
                break;
				// added by leon for display
				case SCANCODE_PAGEUP:
				{
					int olddispPos;
					int newOff;
					int LinesDisp = pMLEditData->MaxlinesDisp;
					
					olddispPos = pMLEditData->dx_chars[pMLEditData->vdispPos];
					newOff = pMLEditData->dx_chars[pMLEditData->veditPos];
					
					if (pMLEditData->StartlineDisp == 0)
						return 0;
					if (pMLEditData->StartlineDisp > LinesDisp - 1) {
						pMLEditData->EndlineDisp = pMLEditData->StartlineDisp;
						pMLEditData->StartlineDisp -= LinesDisp - 1;
						pMLEditData->editLine -= LinesDisp - 1;
					}else {
						pMLEditData->editLine -= pMLEditData->StartlineDisp; 
						pMLEditData->EndlineDisp = LinesDisp -1;
						pMLEditData->StartlineDisp = 0;
					}
					edtGetCaretValid (hWnd, pMLEditData->editLine, olddispPos, newOff);
					// added by leon for scrollbars
					edtSetScrollInfo (hWnd, pMLEditData, TRUE);
	   	   		  	// added by leon for scrollbars
                    InvalidateRect (hWnd, NULL, FALSE);
					edtSetCaretPos (hWnd);
				}
				break;
				case SCANCODE_PAGEDOWN:
				{
					int olddispPos;
					int newOff;
					int LinesDisp = pMLEditData->MaxlinesDisp;
					
					olddispPos = pMLEditData->dx_chars[pMLEditData->vdispPos];
					newOff = pMLEditData->dx_chars[pMLEditData->veditPos];
					
					if (pMLEditData->EndlineDisp == pMLEditData->lines -1)
						return 0;
					if (pMLEditData->lines - pMLEditData->EndlineDisp > LinesDisp - 1) {
						pMLEditData->StartlineDisp = pMLEditData->EndlineDisp;
						pMLEditData->editLine += LinesDisp - 1;
						pMLEditData->EndlineDisp += LinesDisp -1;
					}else {
						pMLEditData->EndlineDisp = pMLEditData->lines - 1;
						pMLEditData->editLine += (pMLEditData->EndlineDisp - (LinesDisp - 1))
							   					- pMLEditData->StartlineDisp;
						pMLEditData->StartlineDisp = pMLEditData->EndlineDisp - (LinesDisp - 1);
					}
					edtGetCaretValid (hWnd, pMLEditData->editLine, olddispPos, newOff);
					// added by leon for scrollbars
					edtSetScrollInfo (hWnd, pMLEditData, TRUE);
	   	   		  	// added by leon for scrollbars
                    InvalidateRect (hWnd, NULL, FALSE);
					edtSetCaretPos (hWnd);
				}
				break;
				// added by leon for display
                default: