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2017-08-28Add a global font loader in XFA testsDan Sinclair
This CL creates a global font loader for use in XFA tests. This is needed because the CFGAS_FontMangaer takes a linearly increasing amount of time to load fonts each time it's loaded. This can get excessively slow for test suites which run a lot of tests. Change-Id: Ie389844b56598ce414f4f761654fa4ed465955fd Reviewed-on: https://pdfium-review.googlesource.com/12090 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-28Remove code which does nothingDan Sinclair
This code will just add 0 to x and subtract 0 from y. Doing nothing. Remove. Change-Id: I6e0aa91d088acd49cb83d4bded29908b544b692b Reviewed-on: https://pdfium-review.googlesource.com/12110 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2017-08-23Reduce FM2JS parser depth limit to avoid memory exhaustionRyan Harrison
The current limit of 2000 is still causing occassional ASAN issues, reducing to 1250. BUG=chromium:757711 Change-Id: Idb07f97b01230afabcceaa23b29495432193ec64 Reviewed-on: https://pdfium-review.googlesource.com/11750 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2017-08-23Remove OnPageLoad and OnPageUnload from CFWL_EditDan Sinclair
This CL updates the text edit engine to load and unload the page directly instead of calling through the edit widget. Change-Id: I636c8e8b0e635968222430098d3d268c75224b42 Reviewed-on: https://pdfium-review.googlesource.com/11590 Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-23Cleanup GetPre* methods in CFDE_TextEdtEngineDan Sinclair
This CL cleans up the GetPre* methods in CFDE_TextEdtEngine. In particular: * GetPreDeleteText was inlined as it was very simple * GetPreReplaceText was removed as unused * GetPreInsertText was renamed to InsertIntoTextCopy to make clear that this was doing the insert into a copy of the text. Change-Id: Icde0126b6ddb0ec9d4956238ebff53c9fe51c051 Reviewed-on: https://pdfium-review.googlesource.com/11531 Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-23Move m_pTextBreak to be a member of CFDE_TxtEdtEngineDan Sinclair
Previously text break was a unique_ptr inside the CFDE_TxtEdtEngine. This CL converts it to be a member instead of a unique_ptr. We never replace the pointer after it's created. Change-Id: I89ab73e81c63c24abfacd38a1141db6473d77640 Reviewed-on: https://pdfium-review.googlesource.com/11530 Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-23Convert string Find methods to return an OptionalRyan Harrison
The Find and ReverseFind methods for WideString, WideStringC, ByteString, and ByteStringC have been converted from returning a raw FX_STRSIZE, to returning Optional<FX_STRSIZE>, so that success/failure can be indicated without using FX_STRNPOS. This allows for removing FX_STRNPOS and by association makes the conversion of FX_STRSIZE to size_t easier, since it forces checking the return value of Find to be explictly done as well as taking the error value out of the range of FX_STRSIZE. New Contains methods have been added for cases where the success or failure is all the call site to Find cared about, and the actual position was ignored. BUG=pdfium:828 Change-Id: Id827e508c8660affa68cc08a13d96121369364b7 Reviewed-on: https://pdfium-review.googlesource.com/11350 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2017-08-23Convert the CFDE_TxtEdtEngine::Insert results into an enum classDan Sinclair
This CL converts the return value to be an enum class and updates the usages to use the names instead of values. Change-Id: I8b6927551679ac4103775a04187daad2e0d6c569 Reviewed-on: https://pdfium-review.googlesource.com/11512 Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-22Converted CFX_Matrix::TransformRect() to take in constsJane Liu
Currently, all three of CFX_Matrix::TransformRect() take in rect values and modify them in place. This CL converts them to take in constant values and return the transformed values instead, and fixes all the call sites. Bug=pdfium:874 Change-Id: I9c274df3b14e9d88c100ba0530068e06e8fec32b Reviewed-on: https://pdfium-review.googlesource.com/11550 Reviewed-by: dsinclair <dsinclair@chromium.org> Commit-Queue: Jane Liu <janeliulwq@google.com>
2017-08-21Convert FDE_TXTEDIT_LINEEND to a private enum classDan Sinclair
This CL converts the enum to an enum class and updates the usage as needed. Change-Id: I7ba883e7d1debee00d3d9baafe941620109df8b8 Reviewed-on: https://pdfium-review.googlesource.com/11511 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-21Cleanup CFDE_TxtEdtBuf and simplify some logic.Dan Sinclair
This CL cleans up nits in CFDE_TxtEdtBuf and simplifies some of the methods. Change-Id: I2092da8e27281a577752fc331fec0612a349dfd6 Reviewed-on: https://pdfium-review.googlesource.com/11335 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
2017-08-21Converted CFDE_TxtEdt{Buf|Engine}::Insert() to take CFX_WideStringJane Liu
Converted CFDE_TxtEdtBuf::Insert(), CFDE_TxtEdtEngine::Insert(), and CFDE_TxtEdtEngine::Inner_Insert() to take in CFX_WideString instead of a wchar_t* and length. Bug=pdfium:757 Change-Id: I6097e9b0d4e584b920b2117b4c5489eedef37767 Reviewed-on: https://pdfium-review.googlesource.com/11411 Commit-Queue: Jane Liu <janeliulwq@google.com> Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2017-08-21Cleanup CFDE_TextOutDan Sinclair
This CL cleans up formatting and simplifies logic in CFDE_TextOut. Change-Id: Ib675a35da79df77854f51e86bf24e5dc90b33b06 Reviewed-on: https://pdfium-review.googlesource.com/11334 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-21Fixing crash on delete or backspace in XFA text edit box.Henrique Nakashima
Bug: pdfium:872 Change-Id: Ib7f0e3708cea2d16d7536ae26777ddc48d7e2c1d Reviewed-on: https://pdfium-review.googlesource.com/11370 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2017-08-17Change XFA DrawWidget() code to take its CFX_Matrix by const-ref.chromium/3192chromium/3191chromium/3190chromium/3189Lei Zhang
Change-Id: Idc9dfcafe6727c1689443ce8f9568567e55d51c8 Reviewed-on: https://pdfium-review.googlesource.com/11114 Commit-Queue: Lei Zhang <thestig@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2017-08-17Change CXFA_FFWidget::RenderWidget() to take a const CFX_Matrix&.Lei Zhang
Change some related code to take a const CFX_Matrix* since it is not immediately obvious if the matrix can be made into a const-ref. Change-Id: I15c840222b575cc479b1f6f0b6d3b3c0e50d5515 Reviewed-on: https://pdfium-review.googlesource.com/11113 Commit-Queue: Lei Zhang <thestig@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2017-08-17Remove default parameters from CXFA_FFWidget methods.Lei Zhang
Also remove an unused method and move a bunch of internal methods into an anonymous namespace. Change-Id: Ic7b4a975852cc2a7384bf3f681b953a5bf7e7d29 Reviewed-on: https://pdfium-review.googlesource.com/11112 Commit-Queue: Lei Zhang <thestig@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2017-08-17Remove default parameters in CXFA_Graphics methods.Lei Zhang
Constify parameters as well. Change-Id: I7e87b11cc73b133b04d49ceed1c46f5afcb89d1a Reviewed-on: https://pdfium-review.googlesource.com/11111 Commit-Queue: Lei Zhang <thestig@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2017-08-17Remove default argument for CXFA_Graphics::SetLineWidth().Lei Zhang
Change-Id: I6ea062bf5def0bc5fea7c52323198209dcf4c3e9 Reviewed-on: https://pdfium-review.googlesource.com/11110 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2017-08-17Remove redundant members in CFDE_TxtEdtEngineDan Sinclair
This CL removes a bunch of redundant members from the text edit engine. The change information tracking was removed as most of it was unused or was used inconsistently. Change-Id: I92460594e46accff0b78e1183c8574fc83ce728a Reviewed-on: https://pdfium-review.googlesource.com/11275 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-17Turn caret movement into an enum classDan Sinclair
This CL changes caret movement into an enum class and removes the MoveNone flag. Change-Id: I8a01b057942d45ceae9a6c3b95cfe3b8dc9ce9a5 Reviewed-on: https://pdfium-review.googlesource.com/11274 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-17Cleanup CFDE_TxtEdtEngine Insert and Delete methodsDan Sinclair
This CL cleans up CFDE_TxtEdtEngine::{Insert|Delete} to cleanup return values, input params and other unused bits. Change-Id: I53c4475ce3dc6518058bc130e9710842df841032 Reviewed-on: https://pdfium-review.googlesource.com/11273 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-17Unify GetTextLength and GetTextBufLength in CFDE_TxtEdtEngineDan Sinclair
The GetTextLength method just proxies to GetTextBufLength. This CL removes GetTextBufLength and puts the functionality into GetTextLength. Change-Id: If324fbeddd05cd63570b6942dc613e273a1fbce7 Reviewed-on: https://pdfium-review.googlesource.com/11272 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-17Cleanup visibilty and unused methods in xfa/fdeDan Sinclair
This CL fixes the visibility of some methods in xfa/fde along with removing unused methods. Unused params are also removed. Change-Id: Ic6e6d2ac8d07dc4bdabb3e0121831e4bf3fbb8ec Reviewed-on: https://pdfium-review.googlesource.com/11271 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-16Tidy CXFA_Color class and argument passing.Tom Sepez
Remove friendship. De-virtualize. Nest enum inside class. Make copy-assignable and pass by const ref. Make pack better on 64-bits. Change-Id: I1ae3b6d03756fa5780e9023795db6648e8b8299a Reviewed-on: https://pdfium-review.googlesource.com/11290 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2017-08-16Move some CFDE_TxtEdt* methods to the headerschromium/3188Dan Sinclair
This CL moves several methods from the CFDE_TxtEdt* classes from the .cpp to .h files. As well, the GetCaretRect method is updated to return the rect instead of using an out param. Change-Id: I1288701f47d9ac1c413fbf06627f20b295b18b86 Reviewed-on: https://pdfium-review.googlesource.com/11270 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
2017-08-16Simplify CFDE_TxtEdtEngine layout codeDan Sinclair
The three CFDE_TxtEdtEngine layout methods are always called in sequence. Update to only have a single Layout() method. Simplify the layout code to use existing helpers. Change-Id: I0f4d9714f231ca3cebf43579d215d97bd2fe525a Reviewed-on: https://pdfium-review.googlesource.com/11231 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
2017-08-16Remove friendship from TxtEdtEngine and TxtEdtPageDan Sinclair
This CL removes the remaining friendship in CFDE_TxtEdtEngine but adding public methods for CFDE_TxtEdtPage to access. Change-Id: I9e6420921bc4567a499c8e688c6db51029659ae8 Reviewed-on: https://pdfium-review.googlesource.com/11230 Reviewed-by: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-16Add parse depth limit to FormCalc parserRyan Harrison
Due to the recursive nature of the FormCalc parser, deeply nested expressions can lead to memory being exhausted. This check is being added to have the parser exit early instead of running out of memory. This should reduce the number of false positives about addressing issues being found by fuzzers. BUG=chromium:752433 Change-Id: I511ecfb07e32073555e1fd1658f3b8b47f1a5a91 Reviewed-on: https://pdfium-review.googlesource.com/11170 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2017-08-16Remove CFWL_WidgetMgrDelegateDan Sinclair
This class is actually an accidentally renamed interface. There is only one concrete class so fold the interface back into the concrete class. Change-Id: If921a34595fad85750389f071ffdc9a5eae09f8e Reviewed-on: https://pdfium-review.googlesource.com/11150 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-15Make GetChar & Clone const for IFX_CharIterRyan Harrison
BUG=pdfium:864 Change-Id: Iab03e1977c859f150452825650afed3520024cca Reviewed-on: https://pdfium-review.googlesource.com/11030 Reviewed-by: dsinclair <dsinclair@chromium.org> Commit-Queue: Ryan Harrison <rharrison@chromium.org>
2017-08-15Hide the undo/redo record classes inside the engineDan Sinclair
This CL moves the implementation of the records which handle undo/redo in the text edit engine into an anonymous namespace in the engine. Change-Id: I299b9738b72e3eccbbec972fd3ea956c491859fa Reviewed-on: https://pdfium-review.googlesource.com/11010 Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-15Add checks on length of string before accessing elements of stringRyan Harrison
BUG=chromium:754982 Change-Id: I41da6828c714d3ed12fe796ae7e228d87b168962 Reviewed-on: https://pdfium-review.googlesource.com/10890 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2017-08-15Remove GetAt from string classesRyan Harrison
This method duplicates the behaviour of the const [] operator and doesn't offer any additional safety. Folding them into one implementation. SetAt is retained, since implementing the non-const [] operator to replace SetAt has potential performance concerns. Specifically many non-obvious cases of reading an element using [] will cause a realloc & copy. BUG=pdfium:860 Change-Id: I3ef5e5e5a15376f040256b646eb0d90636e24b67 Reviewed-on: https://pdfium-review.googlesource.com/10870 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2017-08-15Remove default params from xfa/fde code.Dan Sinclair
This CL removes the default params from methods in xfa/fde. Change-Id: Ide93a51430c62753656b9e9c0bcd842d8179aa3c Reviewed-on: https://pdfium-review.googlesource.com/10952 Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-15Remove CFDE_RenderDeviceDan Sinclair
This CL removes CFDE_RenderDevice. For most of the proxy'd calls we call the CFX_RenderDevice directly now. To set the clip rect an overload was added to accept a CFX_RectF and handle the casting to FX_RECT. The one needed method, DrawString, is move to a static on CFDE_TextOut. Change-Id: I95ea7e1fa1fd4702074b797c06423c9c9cb51db9 Reviewed-on: https://pdfium-review.googlesource.com/10951 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-14Merge CFDE_RenderContext into CFWL_EditDan Sinclair
This CL removes CFDE_RenderContext and moves the ::Render method to be ::RenderText on the CFWL_Edit class which was the only caller. Change-Id: Ic940a3f0d10cfce169f5e491de90803fc8a7940d Reviewed-on: https://pdfium-review.googlesource.com/10950 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-14Cleaning up the visual set iteratorDan Sinclair
This CL starts cleaning up the visual set iterator code. Change-Id: I643dc9edeeb0c7ff06ccd34a1977f811675413d8 Reviewed-on: https://pdfium-review.googlesource.com/10615 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-14Remove FDE_VISUALOBJ_CanvasDan Sinclair
No code sets the visual object type of Canvas. Remove. Change-Id: I213bf7bb93adbb08e949807f53a9e94579d59c1d Reviewed-on: https://pdfium-review.googlesource.com/10614 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
2017-08-14Cleanup more fde definesDan Sinclair
This CL cleans up more defines and shuffles some fde code around to better locations. Change-Id: I6af0e991d9fa489ca45d1d0f9d041657beef3b7e Reviewed-on: https://pdfium-review.googlesource.com/10613 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2017-08-14Cleanup CFDE_TextOut methodsDan Sinclair
This CL removes unused CFDE_TextOut methods and merges some single use methods. Change-Id: Ie625ad737aeb1dc163b03f15f4774744062a9491 Reviewed-on: https://pdfium-review.googlesource.com/10570 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
2017-08-14Cleanup FDE_TTO{STYLE|ALIGNMENT} defines.Dan Sinclair
This CL replaceds FDE_TTOSTYLE defines with a FDE_TextStyle struct which is used to set the needed flags. The FDE_TTOALIGNMENT defines are replaced with an enum class and unused members have been removed. Change-Id: Ib0e2818a82e7f1961de57f8d15703477f8235a03 Reviewed-on: https://pdfium-review.googlesource.com/10530 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-11Add checks of index operations on string classesRyan Harrison
Specifically the index parameter passed in to GetAt(), SetAt() and operator[] are now being tested to be in bounds. BUG=chromium:752480, pdfium:828 Change-Id: I9e94d58c98a8eaaaae53cd0e3ffe2123ea17d8c4 Reviewed-on: https://pdfium-review.googlesource.com/10651 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2017-08-10Remove unused FDE_TTOSTYLE_ flagsDan Sinclair
This CL removes the unused FDE_TTOSTYLE_ flags and their supporting code. Change-Id: Ib5ff1af77ceab5a526a845c1fc316a3742ab810a Reviewed-on: https://pdfium-review.googlesource.com/10455 Reviewed-by: Tom Sepez <tsepez@chromium.org> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-10Remove CFDE_PathDan Sinclair
This CL removes CFDE_Path. There is only one method, AddLine which is required, the rest can be removed. That method is moved to CFX_PathData which is what CFDE_Path is appending to anyway. Change-Id: If50af8cf856a9f7379791fe1999174db5fd13e38 Reviewed-on: https://pdfium-review.googlesource.com/10454 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-10Remove default params in CFDE_RenderDeviceDan Sinclair
This CL removes the two default nullptr values in CFDE_RenderDevice. Change-Id: I32e7cf5f45fcf1fbddd0c9070024647ac06203c5 Reviewed-on: https://pdfium-review.googlesource.com/10453 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-09Remove unused code from CFDE_RenderDevice.Dan Sinclair
Unused code, remove. Change-Id: Icbe53982f932eded350fc67e8022549178b92344 Reviewed-on: https://pdfium-review.googlesource.com/10452 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-09Remove CFDE_{Pen|Brush} classesDan Sinclair
These classes just hold a color value. Instead of creating the class to pass the color we just pass the colors. Change-Id: I7f65ca4100bfbdcb02171c1e7e46150508e338f4 Reviewed-on: https://pdfium-review.googlesource.com/10451 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-08Move CSS code to coreDan Sinclair
The xfa/fde/css code has no other links into xfa/. This CL moves the css code to core/fxcrt/css and sets to only build when pdf_enable_xfa is enabled. Change-Id: Iefd208e1f83a28b80b567c574e841e87bce310be Reviewed-on: https://pdfium-review.googlesource.com/9251 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2017-08-02Rewrite how string Insert() methods handle out of bound indicesRyan Harrison
The existing behaviour was to clamp the provided index to the valid bounds. This would lead to programming errors being hidden, since inserting would still do something even if the index calculation was wrong. The behaviour of these methods has been changed to instead early return when this occurs, returning the old length value. The caller can check if the call to Insert actually did anything by comparing the returned value to the length before calling insert. All of the existing calls to Insert have been tested by running all of the tests with asserts in the Insert method to check the index is in bounds. Additionally the call sites have been manually inspected. The majority of them are of the form Insert(0, foo) and the rest tend to be in a loop advancing from 0 to length. Convenience methods InsertAtFront/InsertAtBack have been added to handle calling Insert when the intent is for the character to be added to the beginning or end of the string. Existing call sites to Insert that do this have been converted. This work was originally being performed to check if there would be any issues in these methods with making FX_STRSIZE unsigned. BUG=pdfium:828 Change-Id: I60cee5ad45338aa8ed46569de7bcc78a76db18f7 Reviewed-on: https://pdfium-review.googlesource.com/9870 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
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