1 /** @file
2 Implementation of various string and line routines
3
4 Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved. <BR>
5 SPDX-License-Identifier: BSD-2-Clause-Patent
6
7 **/
8
9 #include "HexEditor.h"
10
11 extern BOOLEAN HEditorMouseAction;
12
13 /**
14 Free a line and it's internal buffer.
15
16 @param[in] Src The line to be freed.
17 **/
18 VOID
HLineFree(IN HEFI_EDITOR_LINE * Src)19 HLineFree (
20 IN HEFI_EDITOR_LINE *Src
21 )
22 {
23 if (Src == NULL) {
24 return ;
25 }
26
27 SHELL_FREE_NON_NULL (Src);
28
29 }
30
31 /**
32 Advance to the next Count lines.
33
34 @param[in] Count The line number to advance.
35
36 @retval NULL An error occurred.
37 @return A pointer to the line after advance.
38 **/
39 HEFI_EDITOR_LINE *
HLineAdvance(IN UINTN Count)40 HLineAdvance (
41 IN UINTN Count
42 )
43 {
44 UINTN Index;
45 HEFI_EDITOR_LINE *Line;
46
47 Line = HMainEditor.BufferImage->CurrentLine;
48 if (Line == NULL) {
49 return NULL;
50 }
51
52 for (Index = 0; Index < Count; Index++) {
53 //
54 // if already last line
55 //
56 if (Line->Link.ForwardLink == HMainEditor.BufferImage->ListHead) {
57 return NULL;
58 }
59
60 Line = CR (Line->Link.ForwardLink, HEFI_EDITOR_LINE, Link, EFI_EDITOR_LINE_LIST);
61 }
62
63 return Line;
64 }
65
66 /**
67 Retreat to the previous Count lines.
68
69 @param[in] Count The line number to retreat.
70
71 @retval NULL An error occurred.
72 @return A pointer to the line after retreat.
73 **/
74 HEFI_EDITOR_LINE *
HLineRetreat(IN UINTN Count)75 HLineRetreat (
76 IN UINTN Count
77 )
78 {
79 UINTN Index;
80 HEFI_EDITOR_LINE *Line;
81
82 Line = HMainEditor.BufferImage->CurrentLine;
83 if (Line == NULL) {
84 return NULL;
85 }
86
87 for (Index = 0; Index < Count; Index++) {
88 //
89 // already the first line
90 //
91 if (Line->Link.BackLink == HMainEditor.BufferImage->ListHead) {
92 return NULL;
93 }
94
95 Line = CR (Line->Link.BackLink, HEFI_EDITOR_LINE, Link, EFI_EDITOR_LINE_LIST);
96 }
97
98 return Line;
99 }
100
101 /**
102 Advance/Retreat lines.
103
104 @param[in] Count The line number to advance/retreat.
105 >0 : advance
106 <0: retreat
107
108 @retval NULL An error occurred.
109 @return A pointer to the line after move.
110 **/
111 HEFI_EDITOR_LINE *
HMoveLine(IN INTN Count)112 HMoveLine (
113 IN INTN Count
114 )
115 {
116 HEFI_EDITOR_LINE *Line;
117 UINTN AbsCount;
118
119 //
120 // difference with MoveCurrentLine
121 // just return Line
122 // do not set currentline to Line
123 //
124 if (Count <= 0) {
125 AbsCount = (UINTN)ABS(Count);
126 Line = HLineRetreat (AbsCount);
127 } else {
128 Line = HLineAdvance ((UINTN)Count);
129 }
130
131 return Line;
132 }
133
134 /**
135 Advance/Retreat lines and set CurrentLine in BufferImage to it.
136
137 @param[in] Count The line number to advance/retreat.
138 >0 : advance
139 <0: retreat
140
141 @retval NULL An error occurred.
142 @return A pointer to the line after move.
143 **/
144 HEFI_EDITOR_LINE *
HMoveCurrentLine(IN INTN Count)145 HMoveCurrentLine (
146 IN INTN Count
147 )
148 {
149 HEFI_EDITOR_LINE *Line;
150 UINTN AbsCount;
151
152 //
153 // <0: retreat
154 // >0: advance
155 //
156 if (Count <= 0) {
157 AbsCount = (UINTN)ABS(Count);
158 Line = HLineRetreat (AbsCount);
159 } else {
160 Line = HLineAdvance ((UINTN)Count);
161 }
162
163 if (Line == NULL) {
164 return NULL;
165 }
166
167 HMainEditor.BufferImage->CurrentLine = Line;
168
169 return Line;
170 }
171
172
173 /**
174 Free all the lines in HBufferImage.
175 Fields affected:
176 Lines
177 CurrentLine
178 NumLines
179 ListHead
180
181 @param[in] ListHead The list head.
182 @param[in] Lines The lines.
183
184 @retval EFI_SUCCESS The operation was successful.
185 **/
186 EFI_STATUS
HFreeLines(IN LIST_ENTRY * ListHead,IN HEFI_EDITOR_LINE * Lines)187 HFreeLines (
188 IN LIST_ENTRY *ListHead,
189 IN HEFI_EDITOR_LINE *Lines
190 )
191 {
192 LIST_ENTRY *Link;
193 HEFI_EDITOR_LINE *Line;
194
195 //
196 // release all the lines
197 //
198 if (Lines != NULL) {
199
200 Line = Lines;
201 Link = &(Line->Link);
202 do {
203 Line = CR (Link, HEFI_EDITOR_LINE, Link, EFI_EDITOR_LINE_LIST);
204 Link = Link->ForwardLink;
205 HLineFree (Line);
206 } while (Link != ListHead);
207 }
208
209 ListHead->ForwardLink = ListHead;
210 ListHead->BackLink = ListHead;
211
212 return EFI_SUCCESS;
213 }
214
215 /**
216 Get the X information for the mouse.
217
218 @param[in] GuidX The change.
219
220 @return the new information.
221 **/
222 INT32
HGetTextX(IN INT32 GuidX)223 HGetTextX (
224 IN INT32 GuidX
225 )
226 {
227 INT32 Gap;
228
229 HMainEditor.MouseAccumulatorX += GuidX;
230 Gap = (HMainEditor.MouseAccumulatorX * (INT32) HMainEditor.ScreenSize.Column) / (INT32) (50 * (INT32) HMainEditor.MouseInterface->Mode->ResolutionX);
231 HMainEditor.MouseAccumulatorX = (HMainEditor.MouseAccumulatorX * (INT32) HMainEditor.ScreenSize.Column) % (INT32) (50 * (INT32) HMainEditor.MouseInterface->Mode->ResolutionX);
232 HMainEditor.MouseAccumulatorX = HMainEditor.MouseAccumulatorX / (INT32) HMainEditor.ScreenSize.Column;
233 return Gap;
234 }
235
236 /**
237 Get the Y information for the mouse.
238
239 @param[in] GuidY The change.
240
241 @return the new information.
242 **/
243 INT32
HGetTextY(IN INT32 GuidY)244 HGetTextY (
245 IN INT32 GuidY
246 )
247 {
248 INT32 Gap;
249
250 HMainEditor.MouseAccumulatorY += GuidY;
251 Gap = (HMainEditor.MouseAccumulatorY * (INT32) HMainEditor.ScreenSize.Row) / (INT32) (50 * (INT32) HMainEditor.MouseInterface->Mode->ResolutionY);
252 HMainEditor.MouseAccumulatorY = (HMainEditor.MouseAccumulatorY * (INT32) HMainEditor.ScreenSize.Row) % (INT32) (50 * (INT32) HMainEditor.MouseInterface->Mode->ResolutionY);
253 HMainEditor.MouseAccumulatorY = HMainEditor.MouseAccumulatorY / (INT32) HMainEditor.ScreenSize.Row;
254
255 return Gap;
256 }
257